CN202007936U - Sampling down-lead device and sampling port connecting device - Google Patents
Sampling down-lead device and sampling port connecting device Download PDFInfo
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- CN202007936U CN202007936U CN2011201019454U CN201120101945U CN202007936U CN 202007936 U CN202007936 U CN 202007936U CN 2011201019454 U CN2011201019454 U CN 2011201019454U CN 201120101945 U CN201120101945 U CN 201120101945U CN 202007936 U CN202007936 U CN 202007936U
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Abstract
The utility model provides a sampling down-lead device and a sampling port connecting device thereof. The sampling port connecting device comprises a valve core, a valve seat and a fastening nut, wherein a valve seat inner cavity capable of containing the valve core is arranged in the valve seat; a valve seat connecting part I connected with a sampling port is arranged at the front end of the valve seat; the valve core comprises a first valve core and a second valve core which are connected with each other through a thread; the first valve core comprises a top rod, a first valve core middle part and a first valve core connecting part I; a fluid channel is arranged between the outer wall of the first valve core and the wall of the valve seat inner cavity, a first valve core cavity and an oil guide hole are arranged on the first valve core, and the fluid channel is connected with the first valve core cavity through the oil guide hole; a second valve core cavity, a second valve core connecting part and a stop block are arranged on the second valve core; the fastening nut is sheathed on the second valve core and is connected with the end of the valve seat, and the stop block is arranged between the valve seat and the fastening nut. The sampling down-lead device comprises the sampling port connecting device, a connecting pipe and a sampling valve, wherein one end of the connecting pipe is communicated with the second valve core cavity, and the other end of the connecting pipe is connected with the sampling valve.
Description
Technical field
The utility model relates to a kind of sampling instrument, and particularly a kind of being used for drawn lower device and sample tap connection set thereof from the sampling that current transformer draws oil sample.
Background technique
In recent years, oil-immerged inversed current transformer is able to extensive use in electric power system, and especially 500 kilovoltage grading current mutual inductors have generally adopted inversed current transformer especially.According to statistics, surplus at present the inversed current transformer of Hangzhou Power Authority 110 kilovolts and above electric pressure in service just reaches 1700.In order to guarantee the normal operation of power station high-tension apparatus, need regular insulating oil to carry out sample analysis to high-tension apparatus, satisfy the operation requirement with the performance parameter that guarantees insulating oil.
But because the structural feature of inversed current transformer, the safe clear distance wretched insufficiency of sampling work all is unrealized at the charged work of drawing oil sample of inversed current transformer always, all needs to have a power failure before each oil chromatography analytical work regularly and draws oil sample.If the oil chromatography data exception also needs unusual equipment is carried out tracking sampling, will cause equipment frequently to have a power failure, influence the normal operation of electric substation.In addition, inversed current transformer is arranged on the higher position usually, need arrive oil production division by ladder when operator draw oil sample, and has not only increased the time of oil recovery sample, has also increased high-lift operation danger.Moreover, the current transformer of other types also exists and the similar structure characteristic of inversed current transformer, thereby causes with the work progress that draws oil sample of the electricity to current transformer slow.
At present, the pattern of the maintenance of current transformer just changes to the pattern of repair based on condition of component from the pattern of periodical repair, and the repair based on condition of component pattern is the direction of maintenance mode development, is a kind of overhaul of the equipments Security, the higher maintenance pattern of Economy.The repair based on condition of component pattern requires equipment is carried out strict quantity of state data analysis, thereby requirement will come the quantitative analysis of support equipment state with the monitoring of tools data of higher-strength, yet often owing to the reason of current transformer design, cause the safe distance of sampling operation not enough, can not carry out charged sampling, there is contradiction in the repair based on condition of component pattern of this and current transformer, causes difficulty for the equipment state comprehensive assessment.
Therefore, the charged oil sealed sampling device of development current transformer is realized charged sampling, grasps the current transformer equipment state, has far reaching significance to realizing repair based on condition of component truly, the maintenance principle of practicable " non-should repairing ".
Yet, because the prior art personnel are for the charged prejudice that possesses skills that draws oil sample of current transformer, think that charged the drawing oil sample of current transformer can increase the region of bypassed oil of current transformer, can cause gathering less than representational oil sample, perhaps will lose the equipment oil mass in a large number, thereby also not have so far to realize the charged research of drawing oil sample of current transformer.
Application number is that the Chinese patent of CN201010143949.9 discloses a kind of instrument that draws oil sample that is used for drawing oil sample on self-sealing current transformer, this instrument of drawing oil sample comprises retaining oilcan cover empty in, retaining oilcan cover front end is provided with the filler opening of the mouth of draining the oil that can hold current transformer, also be provided with oil outlet on the retaining oilcan cover, be provided with in the retaining oilcan cover with current transformer on the mouth of draining the oil in steel ball correspondingly get oily push rod, this front-end face of getting oily push rod be arranged to and the mouth of draining the oil in the inner sunken face that is complementary of steel ball profile.Instrument has improved the efficient that current transformer draws oil sample to a certain extent though this draws oil sample, and this instrument that draws oil sample also has following defective:
1, retaining oilcan cover does not have the linkage structure that links to each other with current transformer, when sampling, only be that filler opening is enclosed within on the mouth of draining the oil of current transformer, draw oil sample by the masthead that the draws oil sample mouth of firmly draining the oil again, can't guarantee the airtight performance in the process of drawing oil sample, may cause oil sample to reveal befouling environment, in addition, owing to do not have the linkage structure that links to each other with current transformer, when drawing oil sample, all need to reinstall this instrument that draws oil sample at every turn, increased the working strength that draws oil sample;
2, this instrument of drawing oil sample draws oil sample to correct position under oil sample can not being drawn, the staff need arrive this instrument that draws oil sample is installed on the current transformer, in the process of drawing oil sample, the staff also needs to keep filler opening to be enclosed within on the mouth of draining the oil of current transformer, and the masthead that keeps the drawing oil sample mouth of firmly draining the oil, not only increase the working strength of the work of drawing oil sample, but also had high-lift operation danger.
3, oil sample can not drawn the following suitable sample position of arriving because this instrument that draws oil sample does not have the linkage structure that links to each other with current transformer, in the process of drawing oil sample, have safe clear distance defect of insufficient, can not realize the charged function that draws oil sample of current transformer.
The model utility content
The technical problems to be solved in the utility model provides and a kind ofly is used for drawing lower device and being used in this sampling from the charged sampling of drawing oil sample of current transformer drawing sample tap connection set on the lower device, it not only can realize the charged sampling of current transformer, avoid in the operation of sampling process high and medium, guarantee staff's safety, the oil sample of current transformer is directly entered in the sampling container, improved the accuracy and the reliability of test.
In order to realize above-mentioned technical purpose, of the present utility model at first proposed a kind of being used for from the charged sample tap connection set that draws oil sample of current transformer, this sample tap connection set comprises spool, valve seat and tightening nut, wherein: be provided with the valve base cavity of hollow that can ccontaining spool in the described valve seat, the valve seat front end is provided with the valve seat joint one that is connected with sample tap.Described spool comprises first spool and second spool that connects by the screw thread coupling; First spool comprises push rod, first spool middle part that can be passed by the valve base cavity front end and the first spool joint one that is connected with second spool successively; Be provided with the fluid passage that flows into for sampling oil between described first spool outer wall and the valve base cavity wall, also be provided with first spool chamber that communicates with the spool chamber of second spool on first spool, and first spool middle part is provided with the oil guiding hole that connects the fluid passage and first spool chamber.Second spool is provided with second spool chamber of the hollow that communicates with first spool chamber, second spool joint and the block that is connected with the first spool joint one.Tightening nut is sleeved on second spool and with valve seat is terminal and links to each other, and the second spool afterbody passes from fastening nut; Block is between valve seat and tightening nut.
Adopt the sample tap connection set of this structure, because spool comprises first spool and second spool that is threaded, can change the length of spool by the length that adjusting is threaded, and then the adjusting push rod passes the distance of valve seat ante-chamber, even the sample tap at current transformer exists under the situation of machining error, also can draw oil sample by the opening device that distance realizes that push rod backs down sample tap that ejects of regulating push rod.
Existing sample tap connection set often adopts the fuel-displaced mode of bypass to carry out the work of drawing oil sample of current transformer, the oil outlet that is the sample tap connection set is arranged on the sidewall of valve seat, when valve seat is connected with sample tap, error during owing to be threaded, cause being positioned at oil outlet on the valve seat sidewall towards can not determine, behind the external connecting tube, because the deadweights of connecting tube etc. can produce moment of torsion with respect to sample tap, can cause for a long time being connected looseningly between sample tap connection set and the sample tap, reliability reduces.And sample tap connection set of the present utility model adopts radially fuel-displaced mode to carry out the work of drawing oil sample of current transformer, the oil outlet that is the sample tap connection set is positioned at the spool afterbody, the fluid passage that oil sample is flowed through between valve seat outer wall and the spool interior walls enters oil guiding hole, and then by being arranged on first spool chamber in the spool and the second spool chamber water conservancy diversion in external connecting tube, not only can realize the function that draws oil sample, and the switching performance of sample tap and sample tap connection set is more reliable, and the sample tap connection set can be connected on the sample tap of current transformer for a long time.
Further, the outer wall of described first spool or second spool is provided with radial seal structure at least between valve base cavity, by sealing configuration is set, not only can effectively prevent leakage of oil, avoid befouling environment, and can also reduce the region of bypassed oil in the sample tap connection set, the region of bypassed oil that is about to the sample tap connection set is limited in the sealing configuration valve base cavity before.
Further, described valve base cavity wall is provided with valve seat joint two, the first spools middle part and is provided with the first spool joint two that is used for linking to each other with valve seat joint two.When the sample tap connection set is installed, need at first valve seat to be connected with sample tap, then spool is inserted in the valve base cavity, continuous regulating spool length, the distance that push rod is ejected can be backed down the opening device of sample tap and internal structure that can not the break current mutual inductor.The sample tap connection set that adopts this structure when mounted, after at first being installed to valve seat on the sample tap, again spool is inserted valve base cavity, it is motionless to hold second spool, rotate first spool, since between first spool and second spool and the valve seat all by being threaded, can directly regulate the distance that push rod ejects the valve seat ante-chamber, and keep the relative position between second spool and the valve seat constant, when eject distance adjustment suitable after, at last whole connection set is fixed on the sample tap, has simplified installation workload, and improved the installation precision and the installation efficiency of sample tap connection set.
Further, can be provided with first stop nut that is sleeved on first spool, can realize the section of being threaded location fast and effectively prevent to be threaded loosening by first stop nut is set in the threaded connection place of first spool and valve seat joint two; Can be provided with second stop nut that is sleeved on first spool in the threaded connection place of first spool and second spool, by being set, second stop nut can realize the spool length setting fast, and the stability of energy strengthened thread linkage structure, prevent that the screw connection structure between first spool and second spool is loosening.
Preferably, be provided with radial seal structure at least together between described first spool and second spool, in the time of can preventing that oil sample in the connecting tube from refluxing from seepage between first spool and second spool, befouling environment.
Preferably, described first spool middle part has at least one and is flat or slightly is flat side, oil guiding hole is opened in described flat or slightly be on the flat side, adopt the valve core structure of this structure, can form the circulation passage that enough circulates between spool outer wall and the valve base cavity wall for sampling oil, and the energy simplified structure, be convenient to processing.
The utility model has also proposed a kind of sampling and has drawn lower device, comprises aforesaid sample tap connection set, connecting tube and sampling cock, and an end of described connecting tube links to each other with the second spool afterbody and communicates with second spool chamber, and the other end links to each other with sampling cock.
Adopt the sampling of this structure to draw lower device, oil sample can be drained into suitable position by connecting tube draws oil sample, can prevent staff's high-lift operation, and enough safe clear distances have been guaranteed during work in sampling, can realize the charged sampling work of current transformer, current transformer need not to have a power failure again during sampling, has guaranteed the normal operation of electric substation and has improved the sampling working efficiency.
Preferably, the outlet port of described sampling cock is provided with plug, and described sampling cock is provided with dust-proof cover outward, sampling cock places this dust-proof cover, adopt the sampling cock of this structure not only can prevent leakage of oil, guarantee stability, and can also prevent to enter the quality of the oil sample of air dust influence taking-up from sampling cock.
Preferably, described connecting tube internal diameter is no more than 5mm, Environmental Conditions according to current transformer, when the length of connecting tube is two meters, be enough to satisfy oil sample is drawn to descend to draw oil sample to correct position, guaranteeing under the condition that oil sealed sampling device can be fuel-displaced, the region of bypassed oil of oil sealed sampling device in connecting tube of adopting this connecting tube be less than 40ml, can overcome tradition and think that charged the drawing oil sample of current transformer can cause the region of bypassed oil excessive or cause charged the drawing oil sample of current transformer to lose the technology prejudice of equipment oil mass in a large number.
In a word, sampling of the present utility model is drawn lower device and is had following beneficial effect:
1, adopt the sampling of said structure to draw lower device, because oil sample is drawn down to suitable sample position by circulation passage, oil guiding hole, first spool chamber, second spool chamber and connecting tube, therefore enough safe clear distances when sampling work, have been guaranteed, can realize the charged work of drawing oil sample of current transformer, current transformer need not to have a power failure again during sampling, has guaranteed the normal operation of electric substation and has improved the sampling working efficiency;
2, the utility model is taken a sample to suitable position under oil sample is drawn, can avoid the high-lift operation in sampling process, guarantee staff's safety, sampling container directly links to each other with sampling cock during sampling, the oil sample of current transformer is directly entered in the sampling container, improved accuracy, the reliability of test;
3, spool middle part is provided with and is flat or slightly is flat side, and oil guiding hole is opened in that this is flat or slightly be flat side.It is few to adopt the sample tap connection set of this structure to have process step, the advantage that processing cost is low;
4, by selecting suitable connecting tube internal diameter and reduce region of bypassed oil in the sample tap connection set, can the fuel consumption when drawing oil sample be controlled in the allowed band, the fuel consumption when promptly taking a sample is no more than 50ml.
Description of drawings
Fig. 1 draws the first example structure schematic representation of lower device for the utility model sampling;
Fig. 2 is first embodiment's a sample tap connection set structural representation;
Fig. 3 is the A-A sectional view of Fig. 2;
Fig. 4 is first embodiment's a valve seat construction schematic representation;
Fig. 5 is first embodiment's a valve core structure schematic representation;
Fig. 6 draws the second example structure schematic representation of lower device for the utility model sampling;
Fig. 7 is second embodiment's a sample tap connection set structural representation;
Fig. 8 is the A-A sectional view of Fig. 7;
Fig. 9 is second embodiment's a valve seat construction schematic representation;
Figure 10 is second embodiment's a valve core structure schematic representation.
Description of reference numerals:
1-sample tap connection set; The 2-connecting tube; The 3-sampling cock; The 10-valve seat; 11-valve seat joint one; The 12-valve base cavity; 12a-valve seat ante-chamber; 12b-valve seat back cavity; 13-valve seat end; 14-valve seat joint two; 15-valve seat joint three; The 20-spool; 20a-first spool; 20b-second spool; The 21-second spool front portion; The 22-block; The 23-second spool afterbody; The 24-second spool joint; The 25-seal groove; The 26-push rod; 27-first spool middle part; The 28-first spool joint one; The 29-side; The 30-first spool joint two; The 31-projection; The 40-tightening nut; 50-second stop nut; The 51-seal ring; The 52-seal ring; The 53-seal ring; The 54-dust-proof cover; The 55-plug; 56-first stop nut; The 57-seal ring; The 58-seal ring; The 60-fluid passage; The 61-oil guiding hole; 62-first spool chamber; 63-second spool chamber.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is elaborated.
First embodiment
Extremely shown in Figure 5 as Fig. 1, the first example structure schematic representation that draws lower device for the utility model sampling, the sampling of present embodiment is drawn lower device and is comprised sample tap connection set 1, connecting tube 2 and sampling cock 3, connecting tube 2 one ends link to each other with the second spool afterbody 23 of sample tap connection set 1, and the other end is connected on the sampling cock 3.Preferably, the sampling cock outlet is provided with plug 55, also is provided with dust-proof cover 54 outside sampling cock 3, dust-proof cover 54 covers on the sampling cock 3, by plug 55 and dust-proof cover 54 are set, can prevent the leakage of oil of sampling cock place, and can also prevent that koniology from entering in the sampling cock 3, the quality of oil sample is taken out in influence.In addition, the internal diameter of connecting tube 2 is no more than 5mm, and connecting tube can satisfy the fuel-displaced requirement of when sampling, according to the Environmental Conditions of current transformer, when the length of connecting tube is 2 meters, enough oil sample is drained into the requirement of drawing oil sample in the appropriate location.When the internal diameter of connecting tube is 5mm, when length was 2m, the volume in connecting tube this moment was 39.25ml as can be known.
As shown in Figure 2, be first embodiment's sample tap connection set structural representation, the sample tap connection set of present embodiment comprises valve seat 10, spool 20 and tightening nut 40.
As shown in Figure 4, valve seat 10 has hollow cavity 12, and valve seat 10 front ends also are provided with the valve seat joint 1 that is connected with sample tap, and valve seat end 13 is provided with the valve seat joint 3 15 that is complementary with tightening nut 40.Preferably, the valve base cavity 12 of present embodiment is by forming near the valve seat ante-chamber 12a of valve seat front end and the valve seat back cavity 12b of close valve seat end 13, and the internal diameter of valve seat ante-chamber 12a is less than the internal diameter of valve seat back cavity 12b, accordingly, the stepped form that is complementary with valve base cavity 12 is arranged at first spool middle part 27, and the valve base cavity 12 that adopts this structure can effectively reduce region of bypassed oil in the sample tap connection set by the internal diameter that reduces valve seat ante-chamber 12a.
As shown in Figure 5, valve core structure schematic representation for present embodiment, spool 20 comprises the first spool 20a and the second spool 20b that is threaded, first spool middle part 27, the first spool joint 1 that is connected with second spool and first spool chamber 62 that is positioned at first spool that first spool comprises the push rod 26 that can be passed by the valve base cavity front end successively, is complementary with valve base cavity.The second spool front portion 21 that second spool is provided with second spool chamber 63 of the hollow that communicates with first spool chamber 62, the second spool joint 24 that is connected with the first spool joint 1, the block 22 that extends radially outwardly, the second spool afterbody 23 that can link to each other with connecting tube 2 and is complementary with valve base cavity.Tightening nut 40 is sleeved on second spool and with the valve seat joint 3 15 of valve seat end 13 and links to each other, the second spool afterbody 23 passes from fastening nut 40, block 22 is between valve seat 10 and tightening nut 40, it is outer with realization spool 20 installing and locating that block 22 is used for that the second spool afterbody 23 is blocked in valve seat, and spacing with tightening nut 40.
By first spool and second spool that spool 20 is set to be threaded, can be by regulating the length that is threaded between first spool and second spool, regulate push rod 26 and eject valve base cavity 12 to suitable distance, even the sample tap at current transformer exists under the situation of bigger machining error, also can back down the sample tap opening device and draw oil sample with this sample tap connection set 1, and can break current mutual inductor internal structure.In addition, also be provided with second stop nut 50 in the joint of first spool and second spool, by being set, second stop nut 50 can realize spool 20 length settings fast, and the stability of energy strengthened thread linkage structure, prevent that the screw connection structure between first spool and second spool is loosening.
As shown in Figure 2, present embodiment is provided with sealing configuration between second spool and valve base cavity 12, be specially at least one road sealing groove 25 and the seal ring 51 that are arranged on the second spool front portion 21, the seal groove 25 and the seal ring 51 of present embodiment all are provided with three roads, can realize sealing effect, prevent the oil leaking pollution environment.And the sealing by between second spool anterior 21 and the valve base cavity 12 also can reduce the region of bypassed oil in the sample tap connection set, the region of bypassed oil is limited in be arranged in sealing configuration valve base cavity 12 before.In addition, be respectively equipped with seal ring 52 and seal ring 53 between tightening nut 40 and the block and between valve seat joint 1 and the current transformer sample tap, the further sealing that can realize takes a sample draws lower device improves reliability.
As shown in Figure 3, being provided with between first spool middle part 27 outer walls and the valve base cavity wall can be for the fluid passage 60 of sampling oil circulation, first spool middle part 27 is provided with the oil guiding hole 61 that communicates with this fluid passage 60, and first spool, 20 inside are provided with first spool chamber 62 that communicates with oil guiding hole 61, first spool chamber 62 and second spool chamber 63 communicate, and second spool chamber 63 communicates with connecting tube 2.During sampling, sampling oil in first spool chamber 62, and flows into connecting tubes 2 via second spool chamber 63 through fluid passage 60, by oil guiding hole 61 water conservancy diversion, and that realizes the sample tap connection set radially goes out functional oil.Preferably, first spool middle part 27 has at least one and is flat or slightly is flat side 29, and oil guiding hole 61 is opened in described flat or slightly be on the flat side, and fluid passage 60 is the passage between this flat sides 29 and the valve base cavity 12.First spool of present embodiment middle part 27 be provided with in its both sides two symmetrical and be flat or slightly be flat side 29, oil guiding hole 61 runs through and is opened on these bi-side, adopt this structure can make the sectional area of fluid passage 60 bigger, the circulation of sampling oil is more unobstructed, in addition, cooperate between the both sides in addition at first spool middle part 27 and the valve base cavity 12, make the rigging position of spool 20 more firm, can effectively prevent push rod 26 deflections, make the service behaviour of sample tap connection set 1 more stable.
Oil in the oil sealed sampling device region of bypassed oil must be drained when adopting the sampling of present embodiment to draw lower device to sample, to obtain representational oil sample at every turn.But we must recognize: the oil consumption of sampling is the volume that the emptying oil volume adds an oil sample, and must gather standby oil sample because of the success rate ageing and test that needs the consideration test as the sampling that has a power failure, the oil consumption of sampling that promptly has a power failure is the volume of two oil samples, and the volume of each oil sample is 50ml.If relatively as can be known the volume of charged oil sealed sampling device be not more than the volume (50m1) of an oil sample, then charged oil sealed sampling device just can not increase the sampling oil consumption significantly.The sampling of present embodiment is drawn region of bypassed oil in the sample tap connection set of lower device less than 10ml, and the maximum region of bypassed oil of connecting tube is 39.25ml, be whole sampling draw lower device the region of bypassed oil total measurement (volume) less than 50ml, the time can obviously not increase fuel consumption in sampling, can satisfy practical requirement.
Second embodiment:
As Fig. 6-shown in Figure 10, the second example structure schematic representation that draws lower device for the utility model sampling, the sampling of present embodiment is drawn lower device and is comprised sample tap connection set 1, connecting tube 2 and sampling cock 3, connecting tube 2 one ends link to each other with the second spool afterbody 23 of sample tap connection set 1, and the other end is connected on the sampling cock 3.Preferably, be provided with plug 55 in the sampling cock outlet, also be provided with dust-proof cover 54 outside sampling cock 3, dust-proof cover 54 covers on the sampling cock 3.By in the sampling cock outlet, plug 55 being set and dust-proof cover 54 is set outside sampling cock, can prevent that introduced contaminants from entering sampling and drawing lower device internal contamination oil sample, influence the analysis result of oil sample.In addition, guaranteeing that the internal diameter of connecting tube 2 is no more than 5mm under the condition that charged oil sealed sampling device can be fuel-displaced, Environmental Conditions according to current transformer, when the length of connecting tube is 2 meters, enough oil sample is drained into suitable sample position, the interior volume of connecting tube this moment is 39.25ml.
As shown in Figure 7, be the sample tap connection set structural representation of present embodiment, the sample tap connection set of present embodiment comprises valve seat 10, spool 20 and tightening nut 40.
As shown in Figure 9, valve seat 10 has hollow cavity 12, valve seat 10 front ends also be provided with sample tap between adopt the valve seat joint 1 be connected, valve seat end 13 is provided with the valve seat joint 3 15 that is complementary with tightening nut 40, is provided with valve seat joint 2 14 in its valve base cavity.Preferably, the valve base cavity 12 of present embodiment is by forming near the valve seat ante-chamber 12a of valve seat front end and the valve seat back cavity 12b of close valve seat end 13, and the internal diameter of valve seat ante-chamber 12a is less than the internal diameter of valve seat back cavity 12b, valve seat joint 2 14 is arranged on the end of valve seat back cavity, accordingly, the stepped form that is complementary with valve base cavity 12 is arranged at first spool middle part 27, and the valve base cavity 12 that adopts this structure can effectively reduce region of bypassed oil in the sample tap connection set by the internal diameter that reduces valve seat ante-chamber 12a.
As shown in figure 10, spool 20 comprises the first spool 20a and the second spool 20b that is threaded, and first spool middle part 27 that first spool comprises the push rod 26 that can be passed by the valve base cavity front end successively, be complementary with valve base cavity, is arranged on first spool middle part 27 and the first spool joint 2 30, first spool joint 1 that is connected with second spool that is complementary with valve seat joint 2 14 and first spool chamber 62 that is positioned at first spool.The second spool afterbody 23 that second spool is provided with second spool chamber 63 of the hollow that communicates with first spool chamber 62, the second spool joint 24 that is connected with the first spool joint 1, the block 22 that extends radially outwardly and can links to each other with connecting tube 2.Tightening nut 40 is sleeved on second spool and with the valve seat joint 3 15 of valve seat end 13 and links to each other, the second spool afterbody 23 passes from fastening nut 40, block 22 is between valve seat 10 and tightening nut 40, it is outer with realization spool 20 installing and locating that block 22 is used for that the second spool afterbody 23 is blocked in valve seat, and spacing with tightening nut 40.
By first spool and second spool that spool 20 is set to be threaded, and also be threaded between first spool and the valve seat by the first spool joint 2 30 and valve seat joint 2 14, when the sample tap connection set of present embodiment is installed, after at first being installed to valve seat 10 on the sample tap, again spool 20 is inserted valve base cavity 12, hold spool afterbody 33, rotate first spool, can regulate the length that is connected between first spool and second spool and first spool and the valve seat simultaneously, and then adjusting push rod 26 ejects the distance of valve base cavity 12, and can keep the relative position between second spool and the valve seat 10 constant, when push rod 26 eject distance adjustment suitable after, at last whole connection set is fixed on the sample tap.Adopt the sample tap connection set of this structure to reduce installation workload, and improved the installation precision and the installation efficiency of sample tap connection set.
Preferably, be respectively equipped with first stop nut 56 and second stop nut 50 between first spool and the valve seat joint two and between the joint of first spool and second spool, can realizing the section of being threaded location fast and effectively prevent to be threaded loosening by first stop nut 56 and second stop nut are set.Between the first spool joint one and the first spool joint two, establish projection 31 in addition, can be convenient to turn first spool.
As shown in Figure 2, present embodiment is provided with sealing configuration between first spool middle part 27 and valve base cavity 12, be specially at least one road sealing groove 25 and the seal ring 51 that are arranged on first spool middle part 27, the seal groove 25 and the seal ring 51 of present embodiment all are provided with three roads, can realize sealing effect, prevent the oil leaking pollution environment.And the sealing by between first spool middle part 27 and the valve base cavity 12 also can reduce the region of bypassed oil in the sample tap connection set, the region of bypassed oil is limited in be arranged in sealing configuration valve base cavity 12 before.In addition, first spool and the second spool joint also are provided with seal ring 58, go in the tightening nut in order to prevent the oil immersion in the connecting tube 2, further, between tightening nut 40 and the block, between tightening nut 40 and the valve seat 10 and be respectively equipped with seal ring 52, seal ring 57 and seal ring 53 between valve seat joint 1 and the current transformer sample tap, the further sealing that can realize takes a sample draws lower device improves reliability.
As shown in Figure 3, being provided with between middle part 27 outer walls of first spool before the sealing configuration and valve base cavity wall can be for the fluid passage 60 of sampling oil circulation, first spool middle part 27 is provided with the oil guiding hole 61 that communicates with this fluid passage 60, and first spool, 20 inside are provided with first spool chamber 62 that communicates with oil guiding hole 61, first spool chamber 62 and second spool chamber 63 communicate, and second spool chamber 63 communicates with connecting tube 2.During sampling, sampling oil in first spool chamber 62, and flows into connecting tubes 2 via second spool chamber 63 through fluid passage 60, by oil guiding hole 61 water conservancy diversion, and that realizes the sample tap connection set radially goes out functional oil.Preferably, being positioned at first spool middle part 27 before the sealing configuration has at least one and is flat or slightly is flat side 29, oil guiding hole 61 is opened in described flat or slightly be on the flat side, and fluid passage 60 is the passage between this flat sides 29 and the valve base cavity 12.First spool of present embodiment middle part 27 be provided with in its both sides two symmetrical and be flat or slightly be flat side 29, oil guiding hole 61 runs through and is opened on these bi-side, adopt this structure can make the sectional area of fluid passage 60 bigger, the circulation of sampling oil is more unobstructed, in addition, cooperate between the both sides in addition at first spool middle part 27 and the valve base cavity 12, make the rigging position of spool 20 more firm, can effectively prevent push rod 26 deflections, make the service behaviour of sample tap connection set 1 more stable.
The sampling of present embodiment is drawn region of bypassed oil in the sample tap connection set of lower device less than 10ml, and the maximum region of bypassed oil of connecting tube is 39.25ml, be whole sampling draw lower device the region of bypassed oil total measurement (volume) less than 50ml, the time can obviously not increase fuel consumption in sampling, can satisfy practical requirement.
Introduce to use sampling of the present utility model to draw the lower device step that draws oil sample below:
The first step, sample tap connection set 1 is installed on the sample tap of current transformer, make push rod 26 back down the opening device of the sample tap of current transformer, oil sample is drained into sampling cock 3 by fluid passage 60, oil guiding hole 61, first spool chamber 62, second spool chamber 63 and connecting tube 2 respectively;
Second step, open sampling cock dust-proof cover 54, take off the plug 55 in sampling cock 3 outlet ports, the container that will draw oil sample links to each other with sampling cock 3 oil outlets, slowly open sampling cock 3, an amount of oil sample is slowly flowed in the container that draws oil sample, and throttle down is trapped in the oil that draws region of bypassed oil in the lower device of taking a sample this moment and all discharges;
The 3rd step is with the oil sample rinse container that draws oil sample of taking-up;
In the 4th step, the container that draws oil sample that rinse is finished links to each other with sampling cock 3 outlets once more, opens valve, makes an amount of oil sample slowly flow into sampling container, throttle down;
The 5th step installed back plug the sampling cock outlet again, and dust-proof cover is covered on outside the sampling cock.
When drawing oil sample once more, repeat second and went on foot for the 5th step.
In conjunction with the accompanying drawings mode of execution of the present utility model has been done detailed description above, but the utility model is not limited to above-mentioned mode of execution, in the ken that affiliated technical field those of ordinary skill is possessed, can also under the prerequisite that does not break away from the utility model aim, make various variations.
Claims (10)
1. a sample tap connection set is characterized in that, comprises spool, valve seat and tightening nut, and wherein: be provided with the valve base cavity of hollow that can ccontaining spool in the described valve seat, the valve seat front end is provided with the valve seat joint one that is connected with sample tap;
Described spool comprises first spool and second spool that connects by the screw thread coupling; First spool comprises push rod, first spool middle part that can be passed by the valve base cavity front end and the first spool joint one that is connected with second spool successively; Be provided with the fluid passage that flows into for sampling oil between described first spool outer wall and the valve base cavity wall, also be provided with first spool chamber that communicates with the spool chamber of second spool on first spool, and first spool middle part is provided with the oil guiding hole that connects the fluid passage and first spool chamber;
Second spool is provided with second spool chamber of the hollow that communicates with first spool chamber, second spool joint and the block that is connected with the first spool joint one;
Tightening nut is sleeved on second spool and with valve seat is terminal and links to each other, and the second spool afterbody passes from fastening nut; Block is between valve seat and tightening nut.
2. the described sample tap connection set of claim 1 is characterized in that, the outer wall of described first spool or second spool is provided with radial seal structure at least between valve base cavity.
3. the described sample tap connection set of claim 2 is characterized in that, described valve base cavity wall is provided with valve seat joint two, the first spools middle part and is provided with the first spool joint two that is used for linking to each other with valve seat joint two.
4. the described sample tap connection set of claim 3 is characterized in that, is provided with first stop nut that is sleeved on first spool in the threaded connection place of first spool and valve seat joint two.
5. the described sample tap connection set of claim 2 is characterized in that, is provided with radial seal structure at least together between described first spool and second spool.
6. each described sample tap connection set of claim 1-5 is characterized in that, is provided with second stop nut that is sleeved on first spool in the threaded connection place of first spool and second spool.
7. each described sample tap connection set of claim 1-5 is characterized in that, described first spool middle part has at least one and is flat or slightly is flat side, and oil guiding hole is opened in described flat or slightly be on the flat side.
8. lower device is drawn in a sampling, it is characterized in that, comprises the described sample tap connection set of claim 1-7, connecting tube and sampling cock, and an end of described connecting tube links to each other with the second spool afterbody and communicates with second spool chamber, and the other end links to each other with sampling cock.
9. lower device is drawn in sampling as claimed in claim 8, it is characterized in that, the outlet port of described sampling cock is provided with plug, and described sampling cock is provided with dust-proof cover outward, and sampling cock places this dust-proof cover.
10. lower device is drawn in each described sampling as claim 8-9, it is characterized in that, described connecting tube internal diameter is no more than 5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201019454U CN202007936U (en) | 2011-04-08 | 2011-04-08 | Sampling down-lead device and sampling port connecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201019454U CN202007936U (en) | 2011-04-08 | 2011-04-08 | Sampling down-lead device and sampling port connecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202007936U true CN202007936U (en) | 2011-10-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201019454U Expired - Fee Related CN202007936U (en) | 2011-04-08 | 2011-04-08 | Sampling down-lead device and sampling port connecting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202007936U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102230853A (en) * | 2011-04-08 | 2011-11-02 | 杭州市电力局 | Pull-down device for live-line sampling of mutual inductor and connecting device of sample tap |
-
2011
- 2011-04-08 CN CN2011201019454U patent/CN202007936U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102230853A (en) * | 2011-04-08 | 2011-11-02 | 杭州市电力局 | Pull-down device for live-line sampling of mutual inductor and connecting device of sample tap |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111012 Termination date: 20180408 |