KR101664251B1

KR101664251B1 - Oil injecting device

Info

Publication number: KR101664251B1
Application number: KR1020160084678A
Authority: KR
Inventors: 심우영
Original assignee: 심우영
Priority date: 2016-07-05
Filing date: 2016-07-05
Publication date: 2016-10-13

Abstract

An oil injection device is disclosed. According to an aspect of the present invention, there is provided an injection apparatus for injection molding, which comprises a nozzle body capable of moving up and down, a nozzle body having a nozzle tip at one end thereof, a nozzle tip having an inclined surface, And is inclined with respect to the longitudinal direction.

Description

OIL INJECTING DEVICE

The present invention relates to an oil injection apparatus for injecting oil into a workpiece.

The oil injection device is a device for injecting a predetermined amount of oil into the workpiece W. For example, an oil injection system injects a certain amount of oil into a shock absorber tube.

1 is a view showing a state in which oil is injected into an inner chamber 22 and an outer chamber 24 corresponding to the interior of tubes 18 and 20 of a shock absorber corresponding to a workpiece, to be.

The conventional oil injection apparatus 10 has a nozzle 12 through which oil is injected, and the nozzle 12 has a flat injection surface 14. The injection surface 14 has a diameter corresponding to the outer tube 20 and has a plurality of nozzle holes 16 corresponding to a passage through which oil is injected. In the conventional oil injecting apparatus 10, the oil is sprayed in a shower mode in a manner that the oil is simultaneously injected vertically downward through the plurality of nozzle holes 16. [

The conventional oil injection apparatus 10 has a problem in that the ratio of the amount of oil injected into the inner chamber 22 and the outer chamber 24 can not be adjusted because the oil is injected by the shower system. Further, since the conventional oil injecting apparatus 10 is injected in a manner that oil falls, there is a problem that a lot of bubbles are generated in the injected oil. In addition, since the conventional oil injection apparatus 10 needs to be replaced with a nozzle 12 suitable for the standard of the changed tube (the diameter of the nozzle) every time the specifications of the tubes 18 and 20 are changed, . In addition, the conventional oil injecting apparatus 10 has a problem that the oil remaining amount after the oil injection is buried around the nozzle 12 and flows down to contaminate the products and facilities.

The conventional oil injecting apparatus 10 has a problem that the operator is contaminated by the oil because the operator must periodically place the measuring cylinder in the nozzle in order to check whether the amount of oil to be injected corresponds to the set value.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide an oil injection device capable of coping with various types of workpieces.

Other objects of the present invention will become more apparent through the embodiments described below.

According to an aspect of the present invention, there is provided an injection apparatus for injection molding, which comprises a nozzle body capable of moving up and down, a nozzle body having a nozzle tip at one end thereof, a nozzle tip having an inclined surface, And is inclined with respect to the longitudinal direction.

The oil injection apparatus according to the present invention may have one or more of the following embodiments. For example, the nozzle tip may have a conical shape.

A valve provided so as to be able to move up and down within the nozzle body, and an elastic member for elastically pressing the valve in the nozzle tip direction to close the injection hole. The valve is raised by the gas pressure to open the injection hole can do

The nozzle body may have an internal space in which the valve is located and a valve gas injection flow path through which gas can be injected into the internal space.

The valve has a valve body and a valve flange formed around the valve body. The gas injected into the inner space through the valve gas injection path raises and lowers the valve flange, and the elastic member can press the valve flange downward.

And a shaft engaged with the other end of the nozzle body, wherein the elastic member can be supported at one end by a shaft.

A packing is provided in the interior of the nozzle body, and when the tip of the valve contacts the packing, the injection hole can be closed. A plurality of injection holes may be provided.

According to another aspect of the present invention, there is provided an oil injection apparatus including a nozzle body capable of moving up and down, a nozzle body having a nozzle tip at one end thereof, a nozzle tip having an inclined surface, A return flow path is formed at the center of the nozzle tip, and the oil discharged to the outside of the nozzle tip through the injection hole flows into the nozzle tip through the return flow path.

The oil inflow device according to another aspect of the present invention may include at least one of the following embodiments. For example, the oil discharged to the outside through the injection hole can be moved in the direction of the recovery flow path by gravity on the inclined surface.

The nozzle body has an inner space, and the inner space is provided with a hollow collecting member, and the collecting passage can communicate with the collecting member.

The nozzle body has an exhaust gas injection path and can discharge the residual oil to the outside by using the gas injected through the exhaust gas injection path.

The present invention can provide an oil injection device capable of coping with various kinds of workpieces.

In addition, the present invention can provide an oil injecting apparatus capable of treating residual oil to prevent contamination due to oil.

1 is a view showing a state in which a conventional oil injecting apparatus injects oil into a workpiece.
2 is a cross-sectional view illustrating an oil injection apparatus according to an embodiment of the present invention.
3 is a cross-sectional view illustrating a nozzle body of the oil injecting apparatus illustrated in Fig.
4 is a cross-sectional view illustrating a valve of the oil injecting apparatus illustrated in Fig.
5 is a diagram illustrating a state in which a predetermined amount of oil is injected into an inner tube and an outer tube of a workpiece, respectively, according to an embodiment of the present invention.
6 is a view illustrating a state in which an oil injection apparatus according to an embodiment of the present invention is adapted to inject oil corresponding to various kinds of workpieces.
7 is a diagram illustrating an oil injection apparatus and an oil amount measuring apparatus according to an embodiment of the present invention.
8 is a cross-sectional view illustrating an oil injection apparatus according to another embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated in the drawings and will be described in detail in the detailed description. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout the specification and claims. The description will be omitted.

2 is a cross-sectional view illustrating an oil injection apparatus 100 according to an embodiment of the present invention. 3 and 4 are cross-sectional views illustrating the nozzle body 110 and the valve 160 of the oil injection apparatus 100 illustrated in FIG. 2, respectively.

2, the inlet of the injection hole 142 of the oil injecting apparatus 100 is closed by the valve 160 so that the oil can not be injected.

2 to 4, the oil injection apparatus 100 according to the present embodiment injects a predetermined amount of oil into a workpiece W such as a shock absorber, The oil injected at a constant pressure flows on the inner wall of the workpiece W, so that the generation of bubbles in the injected oil can be reduced.

The oil injecting apparatus 100 according to the present embodiment is entirely raised and lowered to adjust the height at which the oil is injected and also to adjust the pressure at which the oil is injected into the inner chamber 22 and the outer chamber 24 It is characterized by the ability to adjust the amount of oil and the ability to inject oil on a wide variety of workpieces.

The oil injecting apparatus 100 according to the present embodiment includes a nozzle body 110, a valve 160, an elastic member 180, a shaft 190, and a collecting member 200.

The nozzle body 110 corresponds to a portion of the oil injecting apparatus 100 that injects the oil close to the workpiece W. [ The nozzle body 110 includes a first body 112 and a second body 130 which are connected to each other in a mutually different diameter.

The first body 112 has a larger inner diameter and an outer diameter than the second body 130 and has one end coupled to the shaft 190 and the other end connected to the second body 130.

The first body 112 has a first inner space 114 corresponding to one of the inner spaces. The first inner space 114 communicates with the second inner space 132 provided in the second body 130 to form an inner space of the nozzle body 110. The first inner space 114 is separated from the second inner space 132 by the step 116. The first internal space 114 is located at one end of the shaft 190, the coupling head 162 of the resilient member 180 and the valve 160 and the valve flange 166.

A valve gas injection port 120 is provided on the outer surface of the first body 112 and the valve gas injection port 120 communicates with the first internal space 114 through the valve gas injection path 118. Therefore, the gas (for example, compressed air) injected through the valve gas injection port 120 can be introduced into the first internal space 114 through the valve gas injection path 118.

The second body 130 corresponds to a portion having a smaller outer diameter and an inner diameter than the first body 112 and has a second inner space 132 therein. The second inner space 132 corresponds to a part of the inner space formed continuously with the first inner space 114. The valve body 170 and the packing 185 are located in the second internal space 132. The second internal space 132 communicates directly with the injection hole 142, the recovery flow path 146, and the discharge gas introduction flow path 134.

An exhaust gas injection port 136 is formed on the circumference of the second body 130 and an exhaust gas injection port 136 is connected to the exhaust gas injection path 134. The gas injected through the exhaust gas inlet 136 passes through the gap between the outer circumferential surface of the valve body 170 and the inner circumferential surface of the second inner space 132 and then injected into the injection hole 142 So that the injection hole 142 and the oil remaining in the vicinity of the injection hole 142 can be discharged to the outside of the nozzle body 110 through the injection hole 142.

A nozzle tip 138 is formed at one end of the second body 130. The nozzle tip 138 corresponds to a portion capable of jetting oil and recovering the remaining oil. The nozzle tip 138 has a conical shape and corresponds to a portion where all or a part of the nozzle tip 138 can be inserted into the tubes 20 and 24 of the workpiece W. [

The nozzle tip 138 may have a shape such as a cone shape or the like in which the diameter or the cross-sectional area is reduced toward its end portion. Thus, the nozzle tip 138 may have an inclined surface 140 on its side. The slope 140 may correspond to a plane or a curved surface. If the nozzle tip 138 is conical, the slope 140 corresponds to a curved surface, and if the nozzle tip 138 is a polygonal pyramid (e.g., hexagonal or octagonal), the slope 140 may correspond to a plane .

The inclined surface 140 may be provided with a spray hole 142. A plurality of the ejection holes 142 may be arranged at regular intervals. The injection hole 142 corresponds to a passage through which the oil is injected to the outside of the nozzle body 110. The injection holes 142 are formed not to be parallel to the longitudinal direction of the nozzle body 110 but to be inclined. The forming angle of the ejection holes 142 with respect to the longitudinal direction of the nozzle body 110 may be greater than 0 degrees and less than or equal to 90 degrees.

The oil discharged through the inclined spray hole 142 can be sprayed to flow on the inner surface of the inner tube 18 or the outer tube 20 of the workpiece W without falling down vertically 5). This makes it possible to significantly reduce the occurrence of bubbles in the injected oil as compared with the conventional oil injecting apparatus which vertically falls by the shower system.

A recovery hole 144 is formed at the tip of the nozzle tip 138 and the recovery hole 144 communicates with the recovery flow path 146. The recovery flow path 146 is formed through the center of the nozzle tip 138 and communicates with the second internal space 132. The oil recovered through the recovery flow path 146 can be discharged to the outside through the recovery member 200.

A step 148 is formed on the inside of the nozzle tip 138 and one end of the recovering member 200 is inserted into a groove (not shown) formed by the step 148.

The valve 160 opens or closes the injection hole 142 while being positioned within the noble body 110 so as to be raised and lowered. That is, when the valve 160 is lowered as shown in FIG. 2, the injection hole 142 is closed, and when the valve 160 rises as shown in FIG. 5, the injection hole 142 is opened.

Valve 160 includes a coupling head 162, a valve flange 166 and a valve body 170.

The coupling head 162 is a portion corresponding to the upper end of the valve 160, and is protruded from the upper portion of the valve flange 166. A coupling head 192 of the shaft 190 is inserted into the coupling head 162. Since the O-ring 164 is inserted into the inner circumferential surface of the coupling head 162, the oil injected from the outside in the direction of the arrow (see FIG. 2) can be prevented from flowing out.

The valve flange 166 is formed around the upper portion of the valve body 170 and has an enlarged diameter as compared with the valve body 170. The outer circumferential surface of the valve flange 166 contacts the inner circumferential surface of the first inner space 114 and moves up and down. An O-ring 167 is inserted into the outer circumferential surface of the valve flange 166 to prevent the gas injected through the valve gas injection path 118 from flowing out to the upper portion of the valve flange 166.

The upper surface of the valve flange 166 is elastically pressed downward by the elastic member 180. 2, when the gas is not supplied through the valve gas injection path 134, the pressing inclined surface 174 corresponding to the tip of the valve 160 is pressed by the pressing force of the elastic member 180, 185). The pressurized inclined surface 174 presses down the packing 185 to close the inlet of the injection hole 142. [

The lower surface of the valve flange 166 is subjected to the upward pressure by the gas introduced through the valve gas inflow passage 118. When the upward pressing force acting on the valve flange 166 by the injected gas is larger than the downward pressing force by the elastic member 180, the valve 160 rises and the inlet of the injection hole 142 is opened.

A stopping step 168 is formed in the valve flange 166 to protrude therefrom. When the valve 160 is lifted, the stopping step 168 can be brought into contact with the coupling head 192 of the shaft 190, thereby limiting the lift of the valve 160 (see FIG. 5). When the engaging head 192 of the shaft 190 abuts against the stopping step 168, the valve 160 corresponds to the maximum raised state.

The valve body 170 corresponds to a hollow cylinder continuously formed at the lower portion of the valve flange 166, and both the upper end portion and the lower end portion thereof are open. The valve 160 has one internal space 172 formed to pass through the entire lengthwise direction. The return member 200 is located in the inner space 172 of the valve 160.

On the inner peripheral surface of the distal end portion of the valve body 170, a pressurized slant surface 174 inclined downward outward is formed. As illustrated in FIG. 2, the pressure ramp surface 174 can press the packing 185 downward, thereby closing the inlet of the spray hole 142.

The elastic member 180 is interposed between the shaft flange 194 of the shaft 190 and the valve flange 166 of the valve 160 to elastically press the valve 160 downward. Accordingly, when external force (upward pressure by gas injection) does not act on the valve 160, the valve 160 is lowered by the elastic member 180 as shown in FIG.

In the oil injection apparatus 100 according to the present embodiment, the elastic member 180 is illustrated as a coil spring. One end of the elastic member 180 corresponding to the coil spring is supported by the shaft flange 194 and the other end is supported by the valve flange 166.

The elevation height of the valve 160 can be adjusted by adjusting the pressure of the gas injected through the valve gas injection path 118 in consideration of the elastic modulus of the elastic member 180. [ By adjusting the elevation height of the valve 160, the degree of opening of the injection hole 142 can be adjusted. Further, the amount of oil injected through the injection hole 142 can be adjusted according to the degree of opening of the injection hole 142. [

In the oil injection apparatus 100 according to the present embodiment, the elastic member 180 is a coil spring, but the present invention is not limited by the type of the elastic member. Therefore, the oil injection device according to another embodiment of the present invention can use a leaf spring, an elastic rubber, or the like as an elastic member. In addition, although one end of the elastic member 180 is illustrated as being supported by the shaft flange 194, it may be supported by the nozzle body 110 as well.

The packing 185 has a ring shape and is located on the bottom surface of the second inner space 132. The packing 185 contacts the pressure ramp surface 174 of the valve 160 so that the oil flowing through the center of the valve 160 does not flow out through the injection hole 142. The packing 185 may be formed of a material having excellent elasticity as compared with a metal such as elastic rubber or the like.

The end of the recovering member 200 is inserted into the through hole (not shown) formed at the center of the packing 185.

The shaft 190 has one end coupled to the nozzle body 110 and the other end coupled to an external device (not shown). The oil injecting apparatus 100 can be moved up and down and left and right by an external device coupled to the shaft 190.

The shaft 190 has a coupling head 192 corresponding to its distal end. The coupling head 192 protrudes from the shaft flange 194 and corresponds to a portion that is relatively movably inserted into the coupling head 162 of the valve 160. As a result, the valve 160 can be guided and raised or lowered by the coupling head 192.

The shaft flange 194 corresponds to the portion that engages the nozzle body 110. [ The outer diameter of the shaft flange 194 may be the same as the outer diameter of the first body 112. A through hole 196 may be formed in the shaft flange 194. The air in the space formed between the valve flange 166 and the shaft flange 194 through the through hole 196 (i.e., the space where the elastic member 180 is located) So that it can be discharged.

The shaft 190 has an internal space 198 formed therethrough at its center through its entire length in the longitudinal direction. And one end of the shaft 190 is opened as illustrated in Fig. The recovered member 200 inserted in the inner space 198 communicates with the inlet of the recovery flow path 146 provided in the nozzle tip 138 after passing through the shaft 190 and the valve 160.

The inner space 198 of the shaft 190 and the inner space 172 of the valve 160 communicate with each other to form an oil injection path. The oil injection passage communicates with the injection hole 142 when the valve 160 rises. Further, the recovery member 200 is located inside the oil injection path.

The recovering member 200 has a hollow tube shape and is located inside the oil injecting apparatus 100 to provide a passage through which the recovered oil is discharged to the outside. At the center of the collecting member (200), a collecting hole (202) is formed. One end of the recovery member 200 communicates with the recovery flow path 146 through the packing 185 and the other end of the recovery member 200 is provided with a recovery device (not shown) capable of forcibly introducing the recovered oil Not shown).

Hereinafter, the operation of the oil injection apparatus 100 according to an embodiment of the present invention will be described with reference to FIGS. 5 to 7. FIG.

5 is a diagram illustrating a state in which the oil injecting apparatus 100 according to the embodiment of the present invention injects a predetermined amount of oil into the inner tube 18 and the outer tube 20 of the workpiece W, respectively. 6 is a view illustrating a state in which the oil injecting apparatus 100 according to the embodiment of the present invention injects oil corresponding to various kinds of workpieces W1 and W2. 7 is a diagram illustrating an oil injection apparatus 100 and an oil amount measurement apparatus 210 according to an embodiment of the present invention.

5 to 7 illustrate the shock absorber including the inner tube 18 and the outer tube 20 as the workpiece W, the present invention is not limited by the type and size of the workpiece.

5, when a high-pressure gas (for example, compressed air) is injected through the valve gas inlet 120, the valve 160 rises in spite of the downward pressing force of the elastic member 180 . As a result, the elastic member 180 elastically contracts and the injection hole 142 is opened while the contact between the pressure inclined surface 174 of the valve 160 and the packing 185 is released.

When the injection hole 142 is opened, the oil injected through the internal space 198 of the shaft 190 and the internal space 172 of the valve 160 passes through the injection hole 142 to the outside of the nozzle tip 138 Can be discharged. The oil discharged to the outside through the injection hole 142 is injected at an inclination angle with respect to the longitudinal direction of the nozzle body 110 without falling in a vertical direction (that is, the longitudinal direction of the nozzle body 110). As a result, the oil is injected into the inner tube 18 of the workpiece W or the inner wall of the outer tube 20.

The oil injected into the inner tube 18 and the inner wall of the outer tube 20 flows into the inner chamber 22 or the outer chamber 24 as it flows along the inner wall. In this way, the oil injecting apparatus 100 according to the present embodiment injects oil so as to have an inclination angle without vertically injecting the oil so that the oil flows along the inner wall of the tubes 18 and 20, Can be reduced.

Referring to FIG. 5A, the oil injection device 100 is lowered so that the nozzle tip 138 can be partially inserted into the inlet of the inner tube 18. In this state, the oil injected through the injection hole 142 is injected only into the inner chamber 22 of the inner tube 18 without being injected into the outer chamber 24.

After completing the oil injection to the inner tube 18, the oil injecting apparatus 100 ascends to the state shown in FIG. 5 (b). At this time, the nozzle tip 138 is not inserted into the inner tube 18, and the injection hole 142 is also located outside the inner tube 18 and the outer tube 20. The oil injected in the state of FIG. 5 (b) is sprayed only in the direction of the inner wall of the outer tube 20 without being sprayed toward the inner wall of the inner tube 18, A desired amount of oil can be injected.

As described above, the oil injection apparatus 100 according to the present embodiment adjusts the position of the nozzle tip 138 with respect to the workpiece W, thereby making it possible to adjust the oil injection amount and the oil injection amount .

The valve 160 is lowered by the resilient restoring force of the elastic member 180 and the pressure gradient slope of the pressure gradient slope surface of the inner chamber 22 and the outer chamber 24 174 press down the packing 185 (see FIG. 2). As a result, the injection hole 142 is closed and the oil can not be injected.

Even after the injection hole 142 is closed, unspuned oil may remain in the injection hole 142 and around the packing 185. This residual oil can flow down and cause problems to contaminate the product and equipment. The oil injection apparatus 100 according to the present embodiment is characterized in that the oil remaining in the injection hole 142 and the like can be recovered through the recovery flow path 146. [

A gas (for example, air) is injected through an exhaust gas inlet 136 provided on the side surface of the nozzle body 110 to recover the oil. The injected gas flows in the direction of the injection hole 142 through a gap formed between the inner circumferential surface of the second inner space 132 and the outer circumferential surface of the valve body 170 through the exhaust gas injection path 134. The inflow gas causes the oil remaining in the vicinity of the injection hole 142 and the packing 185 to be discharged to the outside through the injection hole 142. The oil discharged to the outside through the injection hole 142 flows on the inclined surface 140 of the nozzle tip 138 and is concentrated in the direction of the recovery hole 144 and then flows through the recovery flow path 146 and the recovery hole 202 .

Since the other end of the recovering member 200 is provided with a device capable of sucking the recovered oil such as a vacuum device (not shown) or the like, all of the residual oil concentrated in the recovering hole 144 is returned to the recovery channel 146 Can be inhaled.

As described above, the oil injecting apparatus 100 according to the present embodiment can solve the problem that the residual oil is contaminated by residual oil as in the conventional case by sucking and treating the remaining oil.

Referring to FIG. 6, the oil injection apparatus 100 according to the present embodiment is characterized in that oil can be injected into various kinds of workpieces W. FIG. 6A, oil can be injected even when the diameter of the workpiece W1 is 35 and the diameter of the workpiece W2 is 25 in FIG. 6B. That is, the oil can be injected in accordance with the workpiece having various sizes by adjusting the height of the nozzle tip 138 by raising and lowering the oil injection device 100.

As described above, since the oil injection apparatus 100 according to the present embodiment can inject oil to various types and sizes of workpieces, when the workpiece is changed as in the prior art, It is possible to reduce the excessive time and cost incurred due to the need to replace the backlight unit.

6 (b), when the diameter of the workpiece W2 is small, the nozzle tip 138 is inserted into the inlet of the inner tube 18 so that the upper end of the inner tube 18 of the inclined surface 140 . This allows the inner tube 18 to be inserted vertically in the process of inserting the nozzle tip 138 into the inlet of the inner tube 18 even though the inner tube 18 inserted into the outer tube 20 is not vertically positioned. You can build it.

Referring to FIG. 7, the oil amount measuring apparatus 210 may be provided to determine whether the amount of oil injected from the oil injecting apparatus 100 is correct. The oil amount measuring device 210 is located in a different place from the workpiece W. [ The oil amount measuring apparatus 210 is provided with an apparatus (for example, a measuring cylinder or the like) for measuring the amount of oil injected from the oil injecting apparatus 100, valves and pipes for automatically discharging the injected oil None).

Since the oil injection apparatus 100 according to the present embodiment can move not only in the vertical direction but also in the horizontal direction, the oil injection apparatus 100 according to the present embodiment can inject oil at the position where the workpiece W is located, It is possible to periodically judge whether the amount of oil injected horizontally is correct or not.

As described above, the oil amount measuring apparatus 210 is located at a different location from the workpiece W, and the oil injecting apparatus 100 reciprocates the two positions of the workpiece W and the oil amount measuring apparatus 210 The oil injection and the oil amount measurement are performed, so that the operator can be prevented from being contaminated by the oil.

Hereinafter, an oil injecting apparatus 300 according to another embodiment of the present invention will be described with reference to FIG.

FIG. 8 is a cross-sectional view illustrating an oil injection apparatus 300 according to another embodiment of the present invention, in which the injection hole 342 is closed by a valve 360. FIG.

The oil injecting apparatus 300 according to the present embodiment has the same or similar structure and operation as the oil injecting apparatus 100 according to the above-described embodiment, but has a difference in the driving force for raising the valve 360. [ That is, the oil injection apparatus 300 according to the present embodiment is characterized not by using high-pressure gas but by using the oil to be injected to raise the valve 360.

The oil injecting apparatus 300 according to the present embodiment includes a nozzle body 310, a valve 360, an elastic member 180, a packing 185, a shaft 190, and a collecting member 200. The elastic member 180, the packing 185, the shaft 190 and the collecting member 200 of the oil injecting apparatus 300 according to the present embodiment are the same as those of the oil injecting apparatus 100 according to the above- They are the same as those described above, so a detailed description will be omitted.

The nozzle body 310 in the oil injection apparatus 300 according to the present embodiment is the same as the nozzle body 110 according to the embodiment described above except that a valve gas injection path 118 and a valve gas injection port 120 are not formed. This is because the oil injecting apparatus 300 according to the present embodiment raises the valve 360 using the pressure of the oil to be injected, rather than raising the valve 360 using the high-pressure gas.

The nozzle body 310 according to the present embodiment also has the nozzle tip 338 having the inclined surface 340 and the inclined surface 340 has the injection hole 342 Is formed. In addition, an exhaust gas injection path 334 and an exhaust gas injection port 336 for discharging the remaining oil to the outside are formed on the side surface of the nozzle body 310, and a detailed description thereof will be omitted.

The valve 360 is the same as the valve 160 according to the above-described embodiment, except that an oil outlet hole 362 is formed on the circumferential surface thereof. Some of the oil (see arrows) injected through the upper portion of the shaft 190 may press the lower surface 368 of the valve flange 366 of the valve 360 upward after passing through the oil outlet hole 362 . As described above, the oil injection apparatus 300 according to the present embodiment is characterized in that the valve 360 is raised by the pressure of the oil to be injected. While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. It will be understood that the invention may be varied and varied without departing from the scope of the invention.

100, 300: oil injection device
110, 310: nozzle body
138, 338: nozzle tip
140, 340:
142, 342: injection hole
144: Recovery hole
160, 360: valve
180: elastic member
185: Packing
190: shaft
200: recovery member
210: Oil amount measuring device

Claims

Comprising a nozzle body,
Wherein the nozzle body has a nozzle tip at one end thereof, the nozzle tip has an inclined surface, an injection hole is formed in the inclined surface,
The nozzle tip is provided with a return flow passage,
And the oil discharged to the outside of the nozzle tip through the injection hole flows into the nozzle tip through the return passage.

The method according to claim 1,
And the oil discharged to the outside through the injection hole moves in the direction of the recovery flow passage on the inclined surface by gravity.

The method according to claim 1,
Wherein the nozzle body has an inner space, and the inner space is provided with a hollow collecting member, and the collecting passage communicates with the collecting member.

The method according to claim 1,
Wherein the nozzle body includes an exhaust gas injection path and discharges the residual oil to the outside using gas injected through the exhaust gas injection path.

The method according to claim 1,
Wherein the nozzle tip has a conical shape, and the return flow path is formed at the tip end of the nozzle tip.

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