CN214093946U - Liquid level detection device for lubricating oil tank conveying pipeline - Google Patents

Abstract

The application relates to a liquid level detection device for on lubricating oil tank pipeline, include the oil pipeline with jar body coupling, the position department of keeping away from jar body on the oil pipeline has set firmly mass flow meter, be connected with the inside connecting pipe of intercommunication oil pipeline on the outer wall of oil pipeline, the connecting pipe is located between mass flow meter and the jar body, be provided with on the connecting pipe and be used for detecting the level sensor that has or not lubricating oil process in the oil pipeline, level sensor passes through coupling mechanism and can dismantle with the connecting pipe and be connected. The metering error of the lubricating oil in the oil pipeline can be reduced.

Description

Liquid level detection device for lubricating oil tank conveying pipeline

Technical Field

The application relates to a liquid level detection device for a conveying pipeline of a lubricating oil tank.

Background

The lubricating oil is a liquid or semisolid lubricating agent used on various types of automobiles and mechanical equipment to reduce friction and protect machines and workpieces, and mainly plays roles in lubrication, auxiliary cooling, rust prevention, cleaning, sealing, buffering and the like.

In the related technical scheme, the lubricating oil tank conveys the lubricating oil through an oil conveying pipeline, the lubricating oil in the oil conveying pipeline needs to be metered in the conveying process, a mass flowmeter is generally used for metering in the actual production,

the mass flow meter measures liquid and gas, the route of an oil conveying pipeline is usually long, when the oil conveying pump works, the oil conveying pump pumps lubricating oil at the front end into the oil conveying pipeline and conveys the lubricating oil, the lubricating oil pushes air in the oil conveying pipeline to flow in the same direction while flowing in the oil conveying pipeline, when the air passes through the mass flow meter, the mass flow meter starts counting, when the lubricating oil in the oil conveying pipeline passes through the position of the mass flow meter, the indication number of the mass flow meter records a period of time, and the quantity of the lubricating oil conveyed according to needs is controlled so as to control the start and stop of the oil conveying pump;

in the process, the difference between the end value recorded by the mass flow meter and the initial value recorded by the mass flow meter is the output quantity of the lubricating oil quantity, but a large error exists between the initial value measured by the mass flow meter and the initial value measured by the lubricating oil in the actual oil conveying pipeline through the mass flow meter for the first time, so that the metering of the lubricating oil quantity is inaccurate.

SUMMERY OF THE UTILITY MODEL

In order to reduce the metering error to lubricating oil in the oil pipeline, the application provides a liquid level detection device for on lubricating oil tank pipeline.

The application provides a liquid level detection device for on lubricating oil tank pipeline adopts following technical scheme:

the utility model provides a liquid level detection device for on lubricating oil tank pipeline, includes the oil pipeline with jar body coupling, the position department of keeping away from jar body on the oil pipeline has set firmly mass flow meter, be connected with the inside connecting pipe of intercommunication oil pipeline on oil pipeline's the outer wall, the connecting pipe is located between mass flow meter and the jar body, be provided with on the connecting pipe and be used for detecting the level sensor that has or not lubricating oil process in the oil pipeline, level sensor passes through coupling mechanism and can dismantle with the connecting pipe and be connected.

Through adopting above-mentioned technical scheme, when the pump during operation, the air that exists at first in the oil pipeline can be preferred to pass through mass flow meter, mass flow meter's registration can change this moment, but the staff does not record this registration, when level sensor detects the oil pipeline in there is the liquid level, show that lubricating oil passes through this moment, record mass flow meter's registration this moment, numerical value when using this record is the starting point, when the pump stop work, use final mass flow meter registration as the terminal point, the quantity that lubricating oil passes through is promptly to the difference between the numerical value of terminal point and the starting point numerical value under the record from this, use level sensor can assist the staff to judge when lubricating oil passes through in the oil pipeline, thereby the metering error to lubricating oil in the oil pipeline has been reduced.

The present application may be further configured in a preferred example to: the connecting mechanism comprises a first flange fixedly connected with the connecting pipe, a second flange fixedly connected with the liquid level sensor and a connecting assembly connected with the first flange and the second flange.

Through adopting above-mentioned technical scheme, adopt coupling assembling, couple together first ring flange and second ring flange, can realize with level sensor fixed mounting on the connecting pipe from this.

The present application may be further configured in a preferred example to: the connecting assembly comprises a connecting bolt and a connecting nut, and the connecting bolt penetrates through the first flange plate and the second flange plate and then is in threaded connection with the connecting nut.

Through adopting above-mentioned technical scheme, connecting bolt establishes ties first ring flange and second ring flange back and coupling nut threaded connection, and connecting bolt and coupling nut's cooperation mode practicality is high, and connecting bolt's intensity is high, life cycle is long.

The present application may be further configured in a preferred example to: the connecting mechanism comprises a plurality of hinged rods which are hinged to the connecting pipe and distributed along the circumferential direction of the connecting pipe, a locking rod which is hinged to the free end of the hinged rod, and a locking sleeve which is fixedly arranged on the liquid level sensor and sleeved on the connecting pipe, wherein the circumferential wall of the locking sleeve is circumferentially provided with a circle locking groove, the locking groove is matched with the locking rod, the locking rod is connected with the locking groove in a clamping mode, and the locking rod is adjacent to the locking groove and connected with the locking rod through a locking assembly.

Through adopting above-mentioned technical scheme, after the connecting pipe was established to the last locking cover sleeve of level sensor, the hinge bar rotated, made the hinge bar area locking pole rotate, with locking pole joint in the locking inslot of locking cover, owing to use the locking subassembly to connect between two adjacent locking poles for the card that a plurality of locking pole can be stable is in the locking inslot, realizes from this to be connected stably between locking cover and the connecting pipe.

The present application may be further configured in a preferred example to: one end of the locking rod is fixedly provided with an insertion rod, the other end of the locking rod is provided with an insertion groove, the insertion rod of the locking rod is inserted into the insertion groove of the adjacent locking rod, the insertion rod is provided with a containing groove, the locking assembly is arranged in the containing groove, the locking assembly comprises a locking block arranged in the containing groove in a sliding mode and a compression elastic piece arranged between the locking block and the bottom of the containing groove, a locking hole which is communicated with the insertion groove and matched with the locking block is formed in the locking rod, and the locking block is popped out to the locking hole.

Through adopting above-mentioned technical scheme, the locking piece is pressed manually, make the locking piece carry out the displacement toward the holding tank in, the locking piece can compress the compression elastic component in the holding tank when the displacement, the inserted bar that presses to the locking pole when the locking piece can peg graft in the inserting groove till, the inserted bar is whole pegs graft in the inserting groove back, the locking piece just in time is under the effect of compression elastic component, the locking piece moves out from the holding groove and pegs graft in the locking hole, through the cooperation in locking piece and locking hole, establish ties two adjacent locking poles, and the operation is simple, and the connected mode is firm.

The present application may be further configured in a preferred example to: the compression elastic piece comprises a compression spring, one end of the compression spring is connected with the groove bottom of the accommodating groove, and the other end of the compression spring is connected with the locking block.

Through adopting above-mentioned technical scheme, compression spring's simple structure, simple to operate.

The present application may be further configured in a preferred example to: one side of the locking block, which is far away from the compression elastic piece, is a plane end.

Through adopting above-mentioned technical scheme, the setting up of locking piece plane end is convenient for operating personnel to press the operation to the locking piece.

The present application may be further configured in a preferred example to: be provided with the direction subassembly in the holding tank, the locking piece has the guide way towards one side indent of the tank bottom of holding tank, the direction subassembly includes that the tank bottom fixed connection of one end and holding tank and the other end wear to locate the guide post in the guide way, locking piece and guide post sliding connection, compression spring cover is located on the guide post.

Through adopting above-mentioned technical scheme, because compression spring has elasticity, the locking piece is not high when the holding tank removes, uses the guide post of fixed setting for the guide post has stable guide effect to the locking piece.

The present application may be further configured in a preferred example to: the guide post is characterized in that a cavity is formed in the locking block, the cavity is communicated with the guide groove, a limiting ring is fixedly arranged at one end of the guide post in the cavity, and the cross section area of the limiting ring is larger than that of the notch of the guide groove.

Through adopting above-mentioned technical scheme, when the locking piece was toward the outer displacement of holding tank, the locking piece was to the direction displacement of keeping away from the guide post, and when the lateral wall looks butt of the notch department of locking piece displacement to spacing ring and guide way, the removal of locking piece received and blockked, and the locking piece can not continue to remove from this, has further guaranteed the installation stability of locking piece.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when the pump works, firstly, air existing in the oil conveying pipeline can preferentially pass through the mass flow meter, the indication number of the mass flow meter can be changed at the moment, but a worker does not record the indication number, when the liquid level sensor detects that liquid level exists in the oil conveying pipeline, the indication number indicates that lubricating oil passes through at the moment, the indication number of the mass flow meter is recorded at the moment, the numerical value recorded at the moment is taken as a starting point, when the pump stops working, the final indication number of the mass flow meter is taken as a terminal point, therefore, the difference value between the numerical value at the terminal point and the numerical value at the starting point recorded is the amount of the lubricating oil passing through, the liquid level sensor can be used for assisting the worker in judging when the lubricating oil passes through the oil conveying pipeline, and therefore;

2. after the connecting pipe is established to the last locking cover sleeve of level sensor, rotate the hinge bar, make the hinge bar area locking pole rotate, with locking pole joint in the locking inslot of locking cover, because use the locking subassembly to connect between two adjacent locking poles for the card that a plurality of locking pole can be stable is in the locking inslot, realizes being connected stably between locking cover and the connecting pipe from this.

Drawings

Fig. 1 is a schematic structural diagram of a liquid level detection device for a delivery line of a lubricating oil tank according to a first embodiment of the present application;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is a schematic structural diagram of a liquid level detection device for a delivery line of a lubricating oil tank according to a second embodiment of the present application;

FIG. 4 is an exploded view of the second embodiment of the present application showing the connection tube, the locking lever and the locking sleeve on the tuning fork level switch;

FIG. 5 is a schematic cross-sectional view of a locking sleeve according to a second embodiment of the present application;

FIG. 6 is an enlarged view of portion B of FIG. 3;

FIG. 7 is an exploded view of the second embodiment of the present application showing two locking rods in position relative to each other;

fig. 8 is an enlarged view of the portion C3 in fig. 5.

In the figure, 11, oil pipelines; 111. a connecting pipe; 1111. a first hinge mount; 11111. a first hinge hole; 12. a mass flow meter; 13. a tuning fork liquid level switch; 21. a first flange plate; 22. a second flange plate; 23. a connecting assembly; 231. a connecting bolt; 232. a connecting nut; 31. a sleeving connection ring; 32. a hinged lever; 321. a first movable bar; 322. a second movable bar; 33. a lock lever; 331. a second hinge mount; 332. a plug rod; 3321. accommodating grooves; 333. inserting grooves; 334. a locking hole; 34. a locking sleeve; 341. a socket cavity; 342. a locking groove; 351. a locking block; 3511. a guide groove; 3512. a cavity; 352. a compression spring; 4. a first hinge shaft; 5. a second hinge shaft; 6. a third hinge shaft; 7. a guide post; 71. a limit ring.

Detailed Description

The present application is described in further detail below with reference to the attached drawings.

The embodiment of the application discloses a liquid level detection device for lubricating oil tank pipeline, refer to fig. 1 and 2, and include oil pipeline 11 connected with the jar body, set firmly mass flow meter 12 in the position department of keeping away from the jar body on oil pipeline 11, mass flow meter 12 is used for measuring the lubricating oil that passes through in the oil pipeline 11. The outer wall of oil pipeline 11 is communicated with a connecting pipe 111, connecting pipe 111 is located between mass flow meter 12 and the tank body and is close to the position of mass flow meter 12, a liquid level sensor is arranged on connecting pipe 111, tuning fork liquid level switch 13 is selected for use by the liquid level sensor, and tuning fork liquid level switch 13 is used for detecting whether lubricating oil passes through oil pipeline 11.

Demountable installation is carried out through coupling mechanism between tuning fork liquid level switch 13 and the connecting pipe 111, and coupling mechanism includes first ring flange 21, second ring flange 22 and coupling assembling 23, first ring flange 21 and the 22 looks adaptations of second ring flange, and first ring flange 21 fixed connection is on the tip that oil pipeline 11 was kept away from to connecting pipe 111, and four first connecting holes have been seted up to circumference equidistance on the first ring flange 21.

The second flange plate 22 is fixedly connected to the tuning fork liquid level switch 13, four second connecting holes are formed in the second flange plate 22 at equal intervals in the circumferential direction, the second flange plate 22 and the first flange plate 21 are attached to each other, and the second connecting holes in the second flange plate 22 correspond to the first connecting holes in the first flange plate 21 in a one-to-one mode. Coupling assembling 23 sets up to four groups, and four groups of coupling assembling 23 and four first connecting holes one-to-one, coupling assembling 23 include connecting bolt 231 and coupling nut 232, and the one end of connecting bolt 231 is worn to locate behind first connecting hole and the second connecting hole with coupling nut 232 threaded connection, and coupling nut 232's external diameter is greater than the aperture of first connecting hole and second connecting hole.

The implementation principle of the first embodiment is as follows: when the oil delivery pump works, firstly, air existing in the oil delivery pipeline 11 can preferentially pass through the mass flow meter 12, and the mass flow meter 12 responds to the air, so that the indication number of the mass flow meter 12 can be changed at the moment, but a worker does not record the indication number, when the tuning fork liquid level switch 13 detects that the liquid level exists in the oil delivery pipeline 11, the situation that lubricating oil passes through the oil delivery pipeline 11 at the moment is indicated, the worker records the indication number of the mass flow meter 12 at the moment, the recorded numerical value at the moment is taken as a starting point numerical value, when the oil delivery pump stops working, the finally displayed indication number of the mass flow meter 12 is taken as an end point numerical value, and therefore the quantity of the lubricating oil passing through the oil delivery pipeline 11 can be known according to the difference value between the end point numerical value and the recorded starting point numerical value;

the connection nut 232 is screwed, so that the connection nut 232 is rotated and separated from the connection bolt 231, after the connection nut 232 is separated, the connection bolt 231 is pulled out from the first flange plate 21 and the second flange plate 22, and at the moment, the tuning fork liquid level switch 13 can be separated from the connection pipe 111, so that the tuning fork liquid level switch 13 is detached.

Example two

The difference between the second embodiment and the first embodiment is only that: referring to fig. 3 and 4, the connection mechanism comprises a sleeve ring 31, a hinge rod 32, a locking rod 33 and a locking sleeve 34, wherein the locking sleeve 34 is fixedly connected to the tuning fork liquid level switch 13, and the locking sleeve 34 is a circular disc.

Referring to fig. 4 and 5, a socket cavity 341 is opened on one side of the locking sleeve 34 facing the connecting pipe 111, and the socket cavity 341 is adapted to the socket ring 31. The coaxial line of the sleeve ring 31 and the connecting pipe 111 is arranged, the inner peripheral wall of the sleeve ring 31 is attached to the outer peripheral wall of the connecting pipe 111, the sleeve ring 31 is fixedly connected with the connecting pipe 111, the detection end of the tuning fork liquid level switch 13 is inserted into the oil pipeline 11 from the position of the connecting pipe 111, and the sleeve ring 31 is sleeved in the sleeve cavity 341 of the locking sleeve 34.

Referring to fig. 4, fig. 6, the hinge rod 32 is provided with two, two hinge rods 32 are provided with the axis of the connecting pipe 111 as the central symmetry, the hinge rod 32 includes the first movable rod 321 and the second movable rod 322, the first hinge seat 1111 of fixedly connected to the outer wall of the connecting pipe 111, the first hinge seat 1111 is vertically provided, the first hinge hole 11111 has been provided on the first hinge seat 1111, the axis direction of the first hinge hole 11111 is perpendicular to the axis direction of the connecting pipe 111, the one end of the first movable rod 321 is hinged to the first hinge seat 1111 through the first hinge shaft 4, the one end of the first hinge shaft 4 is fixedly connected to the end of the first movable rod 321, the other end of the first hinge shaft 4 is penetrated into the first hinge hole 11111 of the first hinge seat 1111, and the first hinge shaft 4 is hinged to the first hinge seat 1111. The other end of the first movable rod 321 is hinged to one end of the second movable rod 322 through a second hinge shaft 5, and the second hinge shaft 5 is parallel to the axis direction of the first hinge shaft 4.

Round locking groove 342 has been seted up to locking cover 34's periphery wall circumference, locking pole 33 sets up to two, two locking poles 33 are corresponding with two sets of articulated poles 32, locking pole 33 sets up to the arc and with locking groove 342 looks adaptation, the centre of a circle of locking pole 33 coincides with the centre of a circle of locking cover 34 mutually, locking pole 33 joint in locking groove 342 and the bottom of the interior curved surface laminating in locking groove 342 of locking pole 33, two locking poles 33 are end to end in proper order and form a closed loop, the outer curved surface of locking pole 33 flushes the setting with the periphery wall of locking cover 34 mutually.

The outer curved surface fixedly connected with second articulated seat 331 of locking pole 33, the outer curved surface of second articulated seat 331 perpendicular to locking pole 33 has seted up the articulated hole of second on the articulated seat 331 of second, and the axis direction of the articulated hole of second is unanimous with the axis direction of first articulated hole 11111. One end of the second movable rod 322, which is far away from the first movable rod 321, is hinged to the second hinge seat 331 through the third hinge shaft 6, one end of the third hinge shaft 6 is fixedly connected to the end of the second movable rod 322, the other end of the third hinge shaft 6 penetrates through the second hinge hole of the second hinge seat 331 and is hinged to the second hinge seat 331, and the axial direction of the third hinge shaft 6 is consistent with the axial direction of the second hinge shaft 5.

Referring to fig. 7 and 8, the connecting mechanism further includes a locking assembly, the locking assembly fixedly connects the two locking levers 33, one end of each locking lever 33 is fixedly provided with a plug-in lever 332, the other end of each locking lever 33 is provided with a plug-in groove 333, the plug-in lever 332 is adapted to the plug-in groove 333, and the plug-in lever 332 of the locking lever 33 is plugged into the plug-in groove 333 of the other locking lever 33.

Referring to fig. 4 and 8, the insertion rod 332 is provided with an accommodating groove 3321 inwardly facing one side of the notch of the locking groove 342, the locking assembly is installed in the accommodating groove 3321 and comprises a locking block 351 and a compression elastic member, the locking block 351 is slidably arranged in the accommodating groove 3321 and is matched with the accommodating groove 3321, the locking block 351 slides along the depth direction of the accommodating groove 3321, and one side of the locking block 351 facing the notch of the accommodating groove 3321 is arranged to be a plane. The compression elastic element comprises a compression spring 352, the compression spring 352 is located between the locking block 351 and the groove bottom of the accommodating groove 3321, one end of the compression spring 352 is fixedly connected with the groove bottom of the accommodating groove 3321, the other end of the compression spring 352 is fixedly connected with one side of the locking block 351 facing the groove bottom of the accommodating groove 3321, and when the compression spring 352 is in a normal state, the plane end of the locking block 351 is located outside the accommodating groove 3321.

Referring to fig. 7 and 8, the outer curved surface of the locking rod 33 is provided with a locking hole 334 communicated with the insertion groove 333, the locking hole 334 is matched with the locking block 351, and the locking block 351 pops out of the locking hole 334.

Be provided with the direction subassembly in the holding tank 3321, the direction subassembly includes guide post 7, and the axis direction of guide post 7 is unanimous with the degree of depth direction of holding tank 3321, and the one end of guide post 7 and the tank bottom fixed connection of holding tank 3321. Locking piece 351 has guide way 3511 towards the one side indent of holding tank 3321 tank bottom, guide way 3511 and guide post 7 looks adaptation, and on guide post 7 was located to the guide way 3511 cover of locking piece 351, locking piece 351 and guide post 7 sliding connection, locking piece 351 slided along the axis direction of guide post 7. The cavity 3512 has been seted up to the inside of locking piece 351, and cavity 3512 and guide way 3511 intercommunication each other set up, and the guide post 7 is located the one end of cavity 3512 and has set firmly spacing ring 71, and spacing ring 71 and cavity 3512 looks adaptation, the cross sectional area of spacing ring 71 is greater than the cross sectional area of guide way 3511 notch.

The second embodiment is implemented according to the following principle: when the tuning fork liquid level switch 13 is installed, the locking sleeve 34 on the tuning fork liquid level switch 13 is sleeved on the sleeving ring 31 on the connecting pipe 111, the tuning fork liquid level switch 13 and the connecting pipe 111 are connected together preliminarily, the first movable rod 321 and the second movable rod 322 are rotated, the position of the locking rod 33 is swung, the locking rod 33 can be clamped in the locking groove 342, the locking block 351 on the other locking rod 33 is pressed, the locking block 351 is moved into the accommodating groove 3321, after the locking block 351 is completely pressed into the accommodating groove 3321, the insertion rod 332 on the locking rod 33 is inserted into the insertion groove 333 on the other locking rod 33, the locking block 351 is continuously pressed through the side wall of the insertion groove 333 until the insertion rod 332 is completely inserted into the insertion groove 333, at the moment, the locking block 351 corresponds to the position of the locking hole 334 on the locking rod 33, the compression spring 352 in the accommodating groove 3321 ejects the locking block 351, the locking block 351 is ejected and inserted into the locking hole 334, and at this time, the two locking rods 33 are sequentially connected in a tail-end manner and clamped in the locking groove 342, so that the tuning fork liquid level switch 13 can be fixedly connected to the connecting pipe 111.

The embodiments of the present invention are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (9)

1. A liquid level detection device for use on a lubricating oil tank transfer line, comprising an oil transfer pipe (11) connected to a tank body, characterized in that: keep away from the position department of the jar body on oil pipeline (11) and set firmly mass flow meter (12), be connected with connecting pipe (111) inside intercommunication oil pipeline (11) on the outer wall of oil pipeline (11), connecting pipe (111) are located between mass flow meter (12) and the jar body, be provided with on connecting pipe (111) and be used for detecting the level sensor that has or not lubricating oil process in oil pipeline (11), level sensor passes through coupling mechanism and can dismantle with connecting pipe (111) and be connected.

2. A level detection device for use on a transfer line of a lubricating oil tank, according to claim 1, wherein: the connecting mechanism comprises a first flange (21) fixedly connected with the connecting pipe (111), a second flange (22) fixedly connected with the liquid level sensor and a connecting assembly (23) connected to the first flange (21) and the second flange (22).

3. A level detection device for use on a transfer line of a lubricating oil tank according to claim 2, wherein: the connecting assembly (23) comprises a connecting bolt (231) and a connecting nut (232), and the connecting bolt (231) penetrates through the first flange plate (21) and the second flange plate (22) and then is in threaded connection with the connecting nut (232).

4. A level detection device for use on a transfer line of a lubricating oil tank, according to claim 1, wherein: coupling mechanism including articulated a plurality of articulated poles (32) that connect on connecting pipe (111) and distribute along connecting pipe (111) circumference, articulated connect in locking pole (33) on articulated pole (32) free end, set firmly locking cover (34) on level sensor and cover locate connecting pipe (111), round locking groove (342) have been seted up to locking cover (34) periphery wall circumference, locking groove (342) and locking pole (33) looks adaptation, locking pole (33) joint in locking groove (342), adjacent two connect through the locking subassembly between locking pole (33).

5. A level detection device for use on a transfer line of a lubricating oil tank, according to claim 4, wherein: one end of locking pole (33) sets firmly grafting pole (332), another tip has seted up inserting groove (333), inserting groove (333) is pegged graft in rather than inserting groove (333) of adjacent locking pole (33) in inserting pole (332) of locking pole (33), holding tank (3321) have been seted up on inserting pole (332), the locking subassembly sets up in holding tank (3321), the locking subassembly sets up locking piece (351) in holding tank (3321) and sets up the compression elastic component between the tank bottom of locking piece (351) and holding tank (3321) including sliding, set up locking hole (334) that are linked together and with locking piece (351) looks adaptation on locking pole (33), locking piece (351) pop out to locking hole (334) in.

6. A level detection device for use on a transfer line of a lubricating oil tank, according to claim 5, wherein: the compression elastic piece comprises a compression spring (352), one end of the compression spring (352) is connected with the groove bottom of the accommodating groove (3321), and the other end of the compression spring is connected with the locking block (351).

7. A level detection device for use on a transfer line of a lubricating oil tank, according to claim 5, wherein: the side of the locking block (351) departing from the compression elastic piece is a plane end.

8. The liquid level detection device for the delivery line of the lubricating oil tank as claimed in claim 6, wherein: be provided with the direction subassembly in holding tank (3321), locking piece (351) have guide way (3511) towards one side indent of the tank bottom of holding tank (3321), the direction subassembly includes that one end wears to locate guide post (7) in guide way (3511) with the tank bottom fixed connection and the other end of holding tank (3321), locking piece (351) and guide post (7) sliding connection, compression spring (352) cover is located on guide post (7).

9. A level detection device for use on a transfer line of a lubricating oil tank according to claim 8, wherein: cavity (3512) have been seted up to the inside of locking piece (351), cavity (3512) and guide way (3511) intercommunication setting each other, guide post (7) are located one end of cavity (3512) and have set firmly spacing ring (71), the cross sectional area of spacing ring (71) is greater than the cross sectional area of guide way (3511) notch.

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