Oil-gas interlocking injection valve

Abstract

The oil-gas interlocking injection valve comprises a valve body, a valve element, a one-way valve set and a nozzle assembly, the valve body is provided with an oil inlet channel and an air inlet channel, the nozzle assembly comprises a spray head, the spray head is installed on the valve body, and the oil inlet channel and the air inlet channel are connected to the spray head; the valve element is installed on the valve body and can be driven to slide so as to control connection or disconnection of the oil inlet channel and the nozzle and connection or disconnection of the air inlet channel and the nozzle at the same time. The one-way valve set is installed on the valve body in a driven single-degree-of-freedom sliding mode and used for controlling opening and closing of the oil inlet channel. According to the oil-gas interlocking injection valve, the one-way valve set is additionally arranged at the position of the oil inlet channel, the valve element is arranged in the valve body, oil inlet controls opening and closing of the air inlet channel, air inlet controls opening and closing of the oil inlet channel, oil-gas interlocking is achieved, and the lubrication requirements of equipment under various environment conditions are met; the problems that the gas consumption is large due to the fact that a gas inlet channel of the injection valve is normally opened, and oil flows after shutdown due to the fact that an oil inlet channel is normally opened are effectively solved.

Description

Technical Field

[0001] The invention belongs to the technical field of building construction and relates to an oil-gas interlocking injection valve. Background Art

[0002] Nowadays, gears, racks and chains are often lubricated with injection valves to deliver lubricating oil to the lubrication points. Existing injection valves mainly use oil-gas mixed injection, that is, compressed air and lubricating oil are mixed through the injection valve and then sprayed to the lubrication point through the nozzle. However, the existing injection valves have the following problems during use:

[0003] (1) The existing injection valve air inlet and outlet channels are always connected. When there are a large number of lubrication points, most of the compressed air is ejected through the near-end injection valve. The far-end injection valve will not be able to spray the lubricating oil to the lubrication point due to insufficient air volume, affecting the lubrication effect.

[0004] (2) After the existing injection valve is powered off and shut down, a small amount of lubricating oil still flows out of the injection valve nozzle due to the back pressure of the lubrication system, polluting the environment.

[0005] To solve the above problems, the structure of the injection valve needs to be improved so that the oil circuit and air channel of the injection valve can be controlled synchronously to solve the problem of high gas consumption caused by the injection valve intake channel being normally open, and oil leakage after shutdown caused by the oil intake channel being normally open. Summary of the invention

[0006] In view of this, the present invention provides an oil-gas interlocking injection valve, which increases a one-way valve group at the position of the oil inlet channel and arranges a valve core in the valve body. When working, the one-way valve group is pushed open by the lubricating oil pressure and the valve core is pushed to slide so that the oil inlet channel and the air inlet channel are simultaneously opened and connected to the nozzle. When shutting down, the lubricating oil pressure is reduced to make the one-way valve group return to its original position, and at the same time, the valve core returns to its original position under the action of the air pressure in the air inlet channel, so that the oil inlet channel and the air inlet channel are simultaneously closed, disconnecting the nozzle, allowing the oil inlet to control the opening and closing of the air inlet channel, and the air inlet to control the opening and closing of the oil inlet channel, thereby realizing oil-gas interlocking and meeting the lubrication requirements of the equipment under various environmental conditions. It effectively solves the problems of high gas consumption caused by the injection valve inlet channel being normally open, and oil leakage after shutdown caused by the oil inlet channel being normally open.

[0007] The present invention discloses an oil-gas interlock injection valve, comprising a valve body, a valve core, a one-way valve group and a nozzle assembly, wherein the valve body is provided with an oil inlet passage and an air inlet passage, the nozzle assembly comprises a nozzle, the nozzle is mounted on the valve body, the oil inlet passage and the air inlet passage are respectively connected to the nozzle, the valve core is mounted on the valve body, and the valve core can be driven to slide to simultaneously control the connection or disconnection between the oil inlet passage and the nozzle, and between the air inlet passage and the nozzle;

[0008] The one-way valve group is integrally mounted on the valve body in a driven single-degree-of-freedom sliding manner to control the on-off of the oil inlet channel.

[0009] Furthermore, the valve body is also provided with an adjusting channel and an oil storage tank, the oil inlet channel, the oil storage tank, the adjusting channel and the nozzle are connected in sequence, and the air inlet channel, the adjusting channel and the nozzle are connected in sequence;

[0010] The one-way valve group is integrally arranged on the oil storage tank to control the connection and disconnection between the oil inlet channel and the oil storage tank;

[0011] The valve core is slidably arranged in the regulating passage to simultaneously control the connection or disconnection between the oil inlet passage and the nozzle and between the air inlet passage and the nozzle.

[0012] Furthermore, it also includes a limit joint, the valve body is also provided with an adjusting air chamber, the adjusting air chamber is coaxially arranged with the adjusting channel and communicated with each other, the limit joint is installed on the adjusting air chamber, a limit column is provided at one axial end of the valve core, and the limit column is slidably plugged into the limit joint;

[0013] The limiting column sleeve is provided with an elastic member I, and the two ends of the elastic member I are respectively and correspondingly pressed against the end surface of the limiting joint and the end surface of the valve core.

[0014] Furthermore, the valve body is also provided with an intake bypass, and the intake bypass connects the intake passage and the regulating air chamber.

[0015] Furthermore, the one-way valve group includes a guide column and a limit sleeve, the limit sleeve is fixedly installed on the oil storage tank, the guide column is inserted into the limit sleeve, the axial end of the guide column is provided with a locking plug, the locking plug extends along the center axis toward the direction of the oil inlet channel to form a locking protrusion, the guide column is arranged in such a way that the locking plug faces the oil inlet channel, the guide column can be driven to slide with a single degree of freedom, and the locking protrusion is inserted into or pulled out of the oil inlet channel as the guide column slides so that the oil inlet channel is opened or closed.

[0016] Furthermore, the one-way valve assembly further comprises an elastic member II, wherein the elastic member II is sleeved on the guide column, and the two axial ends of the elastic member II are respectively and correspondingly abutted against the locking plug and the limiting sleeve.

[0017] Furthermore, the valve body is also provided with an air outlet channel, which connects the air inlet channel with the nozzle, the regulating channel is cross-arranged with the air outlet channel and divides the air outlet channel into an exhaust front section and an exhaust rear section, and the valve core is provided with a connecting ring groove, and the valve core can be driven to slide so that the connecting ring groove is aligned with the exhaust front section and the exhaust rear section, thereby connecting the air outlet channel.

[0018] Furthermore, the valve body is also provided with an oil outlet channel, and the oil outlet channel connects the oil storage chamber and the nozzle.

[0019] Furthermore, the nozzle assembly also includes a spray cover and a locking nut, and the spray cover is installed on the spray head through the locking nut.

[0020] Beneficial effects of the present invention:

[0021] The present invention discloses an oil-gas interlocking injection valve; a one-way valve group is added at the position of an oil inlet channel, a valve core is arranged in a valve body, during operation, the one-way valve group is pushed open by lubricating oil pressure and the valve core is pushed to slide so that the oil inlet channel and the air inlet channel are simultaneously opened and connected to a nozzle; when the machine is shut down, the lubricating oil pressure is reduced so that the one-way valve group returns, and at the same time the valve core returns under the action of the air pressure in the air inlet channel, so that the oil inlet channel and the air inlet channel are simultaneously closed, the connection with the nozzle is disconnected, the oil inlet controls the opening and closing of the air inlet channel, and the air inlet controls the opening and closing of the oil inlet channel, thereby achieving oil-gas interlocking and meeting the lubrication requirements of the equipment under various environmental conditions, effectively solving the problems of high gas consumption caused by the injection valve air inlet channel being normally open, and oil leakage after shutdown caused by the oil inlet channel being normally open.

[0022] The injection valve of the present application can effectively ensure that the oil circuit and the air channel are closed in the shutdown state, and can ensure that the lubrication requirements can still be met under working conditions of low gas volume and a large number of lubrication points. The overall structure is compact, the pressure resistance is high, and the sealing and reliability are good. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the present invention;

[0024] Figure 2 It is a structural schematic diagram of the limit joint of the present invention;

[0025] Figure 3 It is a structural schematic diagram of the nozzle assembly of the present invention;

[0026] Figure 4 It is a structural schematic diagram of the one-way valve group of the present invention;

[0027] Figure 5 for Figure 1 A partial enlarged view of the middle A;

[0028] Figure 6 It is a schematic diagram of the state of the present invention when it starts working;

[0029] Figure 7 It is a schematic diagram of the state of the present invention during the working process;

[0030] Figure 8It is a schematic diagram of the state of the present invention after shutdown. DETAILED DESCRIPTION

[0031] It should be noted that, in the description of this specification, the terms "upper", "lower", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. Unless otherwise specified, the front and back in this embodiment are all based on the front and back of the medium flow, and the side where the medium flows first is the front, which is understandable to those skilled in the art and will not be elaborated here.

[0032] The present invention discloses an oil-gas interlock injection valve, comprising a valve body 3, a valve core 7, a one-way valve group 9 and a nozzle assembly 8, wherein the valve body 3 is provided with an oil inlet channel 1 and an air inlet channel 2, the nozzle assembly 8 comprises a nozzle 802, the oil inlet channel 1 and the air inlet channel 2 are respectively connected to the nozzle 802, the valve core 7 is installed on the valve body 3, the valve core 7 can be driven to slide to simultaneously control the connection or disconnection of the oil inlet channel 1 and the nozzle 802 and the air inlet channel 2 and the nozzle 802; the one-way valve group 9 is installed on the valve body 3 as a whole in a driven single-degree-of-freedom sliding manner to control the connection or disconnection of the oil inlet channel 1. As shown in the figure, in this embodiment, a valve core 7 and a one-way valve group 9 are arranged in the valve body 3 to control the synchronous connection or disconnection of the oil inlet channel 1 and the air inlet channel 2 with the nozzle 802. During operation, the one-way valve group 9 is pushed open by the lubricating oil pressure, and then the valve core 7 is pushed to slide by the lubricating oil pressure so that the oil inlet channel 1 and the air inlet channel 2 are opened at the same time and connected with the nozzle 802, so that the oil-gas mixture can be sprayed out; when the machine is shut down, the lubricating oil pressure is reduced so that the one-way valve group 9 returns to its position first, cutting off the oil inlet channel 1, and then the valve core 7 returns to its position under the action of the air pressure of the air inlet channel 2, so that the oil inlet channel 1 and the air inlet channel 2 are disconnected from the nozzle 802 at the same time. The present invention realizes the opening of the air inlet channel 2 controlled by oil intake and the closing of the oil inlet channel 1 controlled by air intake through the synergistic effect of the change in oil pressure and the pressure difference between air pressure and oil pressure, thereby realizing the mutual locking between the oil circuit and the air channel, meeting the lubrication requirements of the equipment under various environmental conditions, and effectively solving the problems of high gas consumption caused by the normal opening of the air inlet channel 2 of the injection valve and oil leakage after shutdown caused by the normal opening of the oil inlet channel 1.

[0033] In this embodiment, the valve body 3 is also provided with an adjusting channel and an oil storage tank, the oil inlet channel 1, the oil storage tank, the adjusting channel and the nozzle 802 are connected in sequence, and the air intake channel 2, the adjusting channel and the nozzle 802 are connected in sequence; the one-way valve group 9 is integrally arranged in the oil storage tank for controlling the connection and disconnection of the oil inlet channel 1 and the oil storage tank; the valve core 7 is slidably arranged in the adjusting channel to simultaneously control the connection or disconnection of the oil inlet channel 1 and the nozzle 802 and the air intake channel 2 and the nozzle 802. As shown in the figure, in this embodiment, by connecting the oil inlet channel 1, the oil storage tank and the nozzle 802, and the air intake channel 2 and the nozzle 802 at the same time through the adjusting channel as the middle channel, and then setting the valve core 7 in the adjusting channel, it is possible to achieve that one valve core 7 controls the connection between two different passages and the nozzle 802 at the same time. At the same time, an oil storage chamber is set between the oil inlet channel 1 and the regulating channel, and the one-way valve group 9 is set in the oil storage chamber, so that the oil inlet channel 1 is closed in the shutdown state, and the closing of the oil inlet channel 1 is achieved by the pressure difference.

[0034] In this embodiment, a limit joint 4 is also included, and the valve body 3 is also provided with an adjusting air chamber, which is coaxially arranged with the adjusting passage and communicated with each other. The limit joint 4 is installed on the adjusting air chamber, and a limit column 701 is provided at one axial end of the valve core 7, and the limit column 701 is slidably plugged into the limit joint 4; the limit column 701 is sleeved with an elastic member I5, and the two ends of the elastic member I5 are respectively correspondingly supported on the end surface of the limit joint 4 and the end surface of the valve core 7. In this embodiment, the valve body 3 is also provided with an intake bypass 13, and the intake bypass 13 connects the intake passage and the adjusting air chamber. As shown in the figure, in this embodiment, the elastic member I5 is a spring. The purpose of setting the elastic member I5 is to ensure that the valve core 7 can be subjected to an axial elastic force. In this embodiment, an air intake bypass 13 is used to ensure that there is always a certain air pressure in the regulating air chamber. This ensures that during the oil pressure drop, the valve core 7 will gradually slide back under the elastic force of the elastic member I5 and the pressure difference between the regulating air chamber and the oil storage chamber, gradually cut off the connection between the oil inlet channel 1 and the air inlet channel 2 and the nozzle 802, until it is completely cut off and enters the shutdown state. As shown in the figure, in this embodiment, the limit joint 4 is also provided with a slot, and the limit column 701 is slidably inserted in the slot, firstly to avoid the valve core 7 to ensure that the valve core 7 can slide smoothly, secondly to limit the valve core 7 in the axial and radial directions, and thirdly to ensure that the elastic member I5 can provide an effective elastic force; as shown in the figure, in this embodiment, the end of the valve core 7 on the side where the limit column 701 is provided is always located in the regulating air chamber, which is also to ensure that the elastic member I5 can provide an effective elastic force. In this embodiment, a combined gasket 14 is also provided on the contact surface of the limit joint 4 and the valve body 3 to improve the sealing performance of the device. In this embodiment, in order to further improve the air tightness of the device, a shaft elastic retaining ring 6 as shown in the figure is provided on the bottom surface of the regulating air chamber corresponding to the end of the regulating channel.

[0035] In this embodiment, the one-way valve group 9 includes a guide column 901 and a limit sleeve 903, the limit sleeve 903 is fixedly installed on the oil storage tank, the guide column 901 is inserted into the limit sleeve 903, the axial end of the guide column 901 is provided with a locking plug 904, the locking plug 904 extends along the central axis toward the direction of the oil inlet channel 1 to form a locking protrusion 905, the guide column 901 is arranged in a manner that the locking plug 904 faces the oil inlet channel 1, the guide column 901 can be driven to slide with a single degree of freedom, and the locking protrusion 905 is inserted into or pulled out of the oil inlet channel 1 with the sliding of the guide column 901 so that the oil inlet channel 1 is opened or closed. In this embodiment, the one-way valve group 9 also includes an elastic member II 902, the elastic member II 902 is sleeved on the guide column 901, and the axial ends of the elastic member II 902 are respectively correspondingly abutted against the locking plug 904 and the limit sleeve 903. As shown in the figure, the limiting sleeve 903 in this embodiment mainly supports and radially limits the guide column 901 to ensure that the guide column 901 can slide smoothly in the oil storage chamber. The locking plug 904 in this embodiment is coaxially arranged with the guide column 901, and the diameter of the locking plug 904 is larger than that of the guide column 901. The two ends of the elastic member II 902 are respectively supported on the axial end faces of the locking plug 904 and the limiting sleeve 903 as shown in the figure. The elastic member II 902 is in a pre-tightened state (that is, in a compressed state), and the locking protrusion is arranged along the central axis of the locking plug 904, which is a conical structure; the oil inlet channel 1 in this embodiment is provided with an outlet channel as shown in the figure. The locking protrusion in the shutdown state is plugged into the outlet channel set by the oil inlet channel 1 under the action of the elastic member II 902, so that the oil circuit is completely cut off. When the machine is turned on, the oil pressure rises to push the guide column 901 away, and the oil inlet channel 1 is connected to the oil storage chamber.

[0036] In this embodiment, the valve body 3 is further provided with an air outlet channel 11, and the air outlet channel 11 connects the air inlet channel 2 with the nozzle 802. The regulating channel is cross-arranged with the air outlet channel 11 and divides the air outlet channel 11 into an exhaust front section and an exhaust rear section. The valve core 7 is provided with a connecting annular groove 702, and the valve core 7 can be driven to slide so that the connecting annular groove 702 is aligned with the exhaust front section and the exhaust rear section, thereby connecting the air outlet channel 11. In this embodiment, the valve body 3 is further provided with an oil outlet channel 12, and the oil outlet channel 12 connects the oil storage chamber with the nozzle 802. In this embodiment, the nozzle assembly 8 also includes a spray cover 803 and a locking nut 804, and the spray cover 803 is installed on the nozzle 802 through the locking nut 804. As shown in the figure, the nozzle 802 in this embodiment has an oil injection channel 806 and an air injection channel 805. In this embodiment, one end of the air outlet channel 11 is connected to the air inlet channel 2, and the other end is connected to the jet channel 805, and the air outlet channel 11 is separated by the regulating channel, so that the air outlet channel 11 and the regulating channel form a channel with a structure of interconnected and cross-intersecting. A connecting annular groove 702 is provided on the valve core 7. When the valve core 7 is pushed to align the connecting annular groove 702 with the exhaust front section and the exhaust rear section, the exhaust channel is connected, and the high-pressure gas can be sprayed out through the nozzle 802. One end of the oil outlet channel 12 in this embodiment is connected to the lower part of the regulating channel, and the other end is connected to the oil injection channel 806. When the oil pressure rises, the valve core 7 will be pushed so that the valve core 7 no longer forms a blockage on the oil outlet channel 12. The oil outlet channel 12 connects the lower part of the regulating channel with the oil injection channel 806. After the oil passes through the oil storage chamber, the regulating channel and the oil outlet channel 12 in sequence, it is sprayed out through the oil injection channel 806 of the nozzle 802. As shown in the figure, in this embodiment, a spray cover 803 is sleeved on the outlet end of the nozzle 802, and the spray cover 803 is installed on the nozzle 802 through a locking nut 804. The nozzle 802 is installed on the valve body 3, and a copper gasket 801 shown in the figure is installed at the joint surface of the nozzle 802 and the valve body 3.

[0037] As shown in the figure, each channel in the present embodiment is formed by machining the outer surface of the valve body 3 inwardly, the regulating channel is vertically arranged, and the installation positions of the oil inlet channel 1, the air inlet channel 2, the oil storage chamber and the nozzle 802 are all horizontally arranged. The regulating air chamber is located at the axial upper end of the regulating channel, and the oil storage chamber is located at the axial lower end of the regulating channel. At the same time, in order to ensure the air tightness of the entire valve body 3, plugs 10 are also provided at multiple locations on the valve body 3 as shown in the figure.

[0038] In actual use, when the oil pressure rises, the guide column 901 of the one-way valve group 9 is pushed open, and the oil inlet channel 1 is connected to the oil storage chamber. Figure 6As shown, the valve core 7 is pushed synchronously with the increase of oil pressure, the air outlet channel 11 is connected, the regulating channel and the bottom and the oil outlet channel 12 are also connected, and the oil and high-pressure air are sprayed out synchronously; when the machine is stopped, the oil pressure drops, and the guide column 901 of the one-way valve group 9 returns to its position first, closing the oil inlet channel 1 and cutting off the oil inlet. The valve core 7 gradually slides back to its position as the oil pressure drops, as shown in FIG. Figure 7 As shown; when the valve core 7 is fully returned, the residual oil in the oil storage chamber is also emptied, and the oil and gas are completely cut off and the injection is stopped at the same time, as shown in FIG. Figure 8 The injection valve of the present application can effectively ensure that the oil circuit and the air channel are closed in the shutdown state, and can ensure that the lubrication requirements can still be met under the working conditions of low gas volume and a large number of lubrication points, and the overall structure is compact, high pressure resistance, and good sealing and reliability.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. An oil-gas interlock injection valve, characterized in that: It comprises a valve body, a valve core, a one-way valve group and a nozzle assembly, wherein the valve body is provided with an oil inlet passage and an air inlet passage, the nozzle assembly comprises a nozzle, the nozzle is mounted on the valve body, the oil inlet passage and the air inlet passage are respectively connected to the nozzle, the valve core is mounted on the valve body, and the valve core can be driven to slide to simultaneously control the connection or disconnection between the oil inlet passage and the nozzle, and between the air inlet passage and the nozzle; The one-way valve group is installed on the valve body in a driven single-degree-of-freedom sliding manner to control the on-off of the oil inlet channel.

2. The oil-gas interlock injection valve according to claim 1, characterized in that: The valve body is also provided with an adjusting channel and an oil storage tank, the oil inlet channel, the oil storage tank, the adjusting channel and the nozzle are connected in sequence, and the air inlet channel, the adjusting channel and the nozzle are connected in sequence; The one-way valve group is integrally arranged on the oil storage tank to control the connection and disconnection between the oil inlet channel and the oil storage tank; The valve core is slidably arranged in the regulating passage to simultaneously control the connection or disconnection between the oil inlet passage and the nozzle and between the air inlet passage and the nozzle.

3. The oil-gas interlock injection valve according to claim 2, characterized in that: It also includes a limit joint, the valve body is also provided with an adjusting air chamber, the adjusting air chamber is coaxially arranged with the adjusting channel and communicated with each other, the limit joint is installed on the adjusting air chamber, a limit column is provided at one axial end of the valve core, and the limit column is slidably plugged into the limit joint; The limiting column sleeve is provided with an elastic member I, and the two ends of the elastic member I are respectively and correspondingly pressed against the end surface of the limiting joint and the end surface of the valve core.

4. The oil-gas interlock injection valve according to claim 3, characterized in that: The valve body is further provided with an intake bypass, which connects the intake passage and the regulating air chamber.

5. The oil-gas interlock injection valve according to claim 2, characterized in that: The one-way valve group includes a guide column and a limit sleeve, the limit sleeve is fixedly installed on the oil storage tank, the guide column is inserted into the limit sleeve, the axial end of the guide column is provided with a locking plug, the locking plug extends along the central axis toward the direction of the oil inlet channel to form a locking protrusion, the guide column is arranged in such a way that the locking plug faces the oil inlet channel, the guide column can be driven to slide with a single degree of freedom, and the locking protrusion is inserted into or pulled out of the oil inlet channel as the guide column slides so that the oil inlet channel is opened or closed.

6. The oil-gas interlock injection valve according to claim 5, characterized in that: The one-way valve assembly further comprises an elastic member II, which is sleeved on the guide column, and the two axial ends of the elastic member II are respectively and correspondingly supported against the locking plug and the limiting sleeve.

7. The oil-gas interlock injection valve according to claim 2, characterized in that: The valve body is also provided with an air outlet channel, which connects the air inlet channel with the nozzle, the regulating channel is cross-arranged with the air outlet channel and divides the air outlet channel into an exhaust front section and an exhaust rear section, and the valve core is provided with a connecting ring groove, and the valve core can be driven to slide so that the connecting ring groove is aligned with the exhaust front section and the exhaust rear section, thereby connecting the air outlet channel.

8. The oil-gas interlock injection valve according to claim 2, characterized in that: The valve body is also provided with an oil outlet channel, and the oil outlet channel connects the oil storage chamber and the nozzle.

9. The oil-gas interlock injection valve according to claim 1, characterized in that: The nozzle assembly also includes a spray cover and a locking nut, and the spray cover is installed on the spray head through the locking nut.

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