CN115585382A - Injection valve - Google Patents

Abstract

The disclosure provides an injection valve, and belongs to the technical field of automatic lubrication systems. The injection valve comprises a valve body, a valve core structure and an injection structure, wherein a communication channel, an oil inlet channel, an air inlet channel, an oil injection channel and an air injection channel are arranged in the valve body, the first end of the oil inlet channel, the first end of the air inlet channel, the first end of the oil injection channel and the first end of the air injection channel are respectively communicated with the communication channel, the second end of the oil injection channel is used for ejecting lubricating grease, and the second end of the air injection channel is used for ejecting compressed air; the valve core structure is movably located in the communication channel, and the lubricating grease can be sprayed out by simultaneously introducing compressed air into the injection valve through the injection valve, so that the waste of the compressed air is avoided.

Description

Injection valve

Technical Field

The disclosure belongs to the technical field of automatic lubrication systems, and particularly relates to an injection valve.

Background

Rack and pinion lift systems typically require the installation of an automatic lubrication system to lubricate the drive gears. The automatic lubrication system is characterized in that lubricating grease is conveyed to an injection valve through a pipeline by a lubrication pump, then compressed air is introduced into the injection valve to be mixed with the lubricating grease, and the lubricating grease in the injection valve is injected onto the gear surface of a transmission gear to be lubricated by the pressure of the compressed air.

In the related art, a lubrication pump in an automatic lubrication system periodically delivers grease to each injection valve and then injects the grease to a gear surface to be lubricated.

Because the lubricating grease and the compressed air in the injection valve in the automatic lubricating system can not be interlocked, namely at the same time point, only one injection valve in the automatic lubricating system has lubricating grease output, and all the injection valves inject the compressed air, the waste of the compressed air is caused, the utilization rate is low, the insufficient pressure of the compressed air is easily caused, the lubricating grease can not be injected to the lubricating point, and the lubricating effect is poor.

Disclosure of Invention

The embodiment of the disclosure provides an injection valve, which can inject compressed air into the injection valve to spray out lubricating grease when the lubricating grease is introduced, so that the waste of the compressed air is avoided. The technical scheme is as follows:

the embodiment of the disclosure provides an injection valve, which comprises a valve body, a valve core structure and an injection structure, wherein a communication channel, an oil inlet channel, an air inlet channel, an oil injection channel and an air injection channel are arranged in the valve body, the first end of the oil inlet channel, the first end of the air inlet channel, the first end of the oil injection channel and the first end of the air injection channel are respectively communicated with the communication channel, the second end of the oil inlet channel is used for introducing lubricating grease into the valve body, the second end of the air inlet channel is used for introducing compressed air into the valve body, the second end of the oil injection channel is used for spraying lubricating grease, and the second end of the air injection channel is used for spraying compressed air; the valve core structure is movably positioned in the communication channel, the valve core structure has a first state and a second state, when the valve core structure is in the first state, the communication channel is communicated with the first end of the oil inlet channel and the first end of the oil injection channel and is communicated with the first end of the air inlet channel and the first end of the air injection channel, and when the valve core structure is in the second state, the valve core structure cuts off the oil inlet channel and the oil injection channel and cuts off the air inlet channel and the air injection channel; the injection structure is connected with the valve body and is connected with the second end of the oil injection channel and the second end of the air injection channel.

In another implementation manner of the present disclosure, the valve element structure includes a top rod and a check valve, the check valve is fixed in the communication channel, a first port of the check valve is communicated with a first end of the air intake channel, a second port of the check valve is communicated with a first end of the air injection channel, the top rod is movably located in the communication channel, and one end of the top rod abuts against a valve element of the check valve, the top rod is configured to push the valve element when a pressure in the oil intake channel is greater than a preset value, so that the first port and the second port of the check valve are connected, and the check valve is disconnected when the pressure in the oil intake channel is less than the preset value.

In another implementation manner of the present disclosure, the ejector rod includes a first end rod, an intermediate rod, and a second end rod, which are connected in sequence, an outer diameter of the first end rod and an outer diameter of the second end rod are both smaller than an outer diameter of the intermediate rod, the intermediate rod is in sealing fit with an inner wall of the communication channel, and the second end rod abuts against the valve core; the first end of the oil inlet channel is located at one end, close to the first end rod, of the middle rod, when the valve core structure is in the first state, the first end of the oil injection channel is located at one end, close to the first end rod, of the middle rod, and when the valve core structure is in the second state, the first end of the oil injection channel is blocked by the side wall of the middle rod.

In another implementation manner of the present disclosure, the valve body includes a valve block and a plug, the oil inlet channel, the air inlet channel, the oil injection channel, the air injection channel, and the communication channel are respectively located inside the valve block, the plug is located at one end of the communication channel, and when the valve core structure is in the first state, the plug contacts with the first end rod.

In yet another implementation of the present disclosure, the check valve includes a valve sleeve, an elastic member, and the valve core; the valve sleeve is inserted in the communicating channel, the first valve port is positioned on the side wall of the valve sleeve, and the second valve port is positioned at one end of the valve sleeve close to the plug; the elastic piece and the valve core are positioned in the valve sleeve, the elastic piece is positioned at one end of the valve core far away from the plug, and two ends of the elastic piece are respectively abutted against the valve core and the valve sleeve.

In another implementation manner of the present disclosure, the valve sleeve includes a threaded sleeve and a limiting post, the limiting post is inserted into the threaded sleeve and is in threaded connection with the threaded sleeve, the elastic member is sleeved on the limiting post, and the elastic member abuts against the limiting post.

In another implementation manner of the present disclosure, a side of the inner wall of the valve sleeve facing the valve core has a first conical surface, and an outer wall of the valve core facing the ejector rod has a second conical surface; when the valve core structure is in a second state, the first conical surface and the second conical surface are in sealing fit together.

In yet another implementation of the present disclosure, the jetting structure includes a jetting seat and a nozzle; the nozzle is connected with the injection seat; the injection seat is connected with the valve body, a first injection channel and a second injection channel are arranged in the injection seat, two ends of the first injection channel are communicated with the oil injection channel and the nozzle respectively, and two ends of the second injection channel are communicated with the air injection channel and the nozzle respectively.

In yet another implementation of the present disclosure, the second injection channel is plural, and the plural second injection channels are arranged around the first injection channel.

In still another implementation of the present disclosure, the first injection passage includes a first sub-passage and a second sub-passage communicating with each other, an inner diameter of the first sub-passage is larger than an inner diameter of the second sub-passage, the first sub-passage communicates with the oil injection passage, and the second sub-passage communicates with an interior of the nozzle.

The technical scheme provided by the embodiment of the disclosure has the following beneficial effects:

when the injection valve provided by the embodiment of the disclosure is applied to lubricating gears in a gear rack lifting system, as the valve body of the injection valve is internally provided with the oil inlet channel, the air inlet channel, the oil injection channel, the air injection channel and the communication channel, lubricating grease can be introduced into the valve body through the oil inlet channel, and meanwhile, compressed air is introduced into the valve body through the air inlet channel. And because the valve core structure is movably positioned in the valve body and has a first state and a second state, when the valve core structure is in the first state, the oil inlet channel is communicated with the oil injection channel through the communication channel, and the air inlet channel is communicated with the air injection channel through the communication channel, so that lubricating grease can be sprayed out of the injection structure under the action of compressed air to lubricate the gear. And when the valve core structure is in the second state, the valve core structure separates the oil inlet channel from the oil injection channel, the communicating channel separates the air inlet channel from the air injection channel, and at the moment, lubricating grease and compressed air can not be sprayed out from the injection structure.

That is to say, among the above injection valve, can come the position of nimble control case structure in the valve body according to whether grease gets into the oil feed passageway, and then whether realize that grease is outside the blowout valve body under compressed air's effect. When lubricating grease is input into the oil inlet channel, the valve core structure can be controlled to be in the first state, so that the lubricating grease can be smoothly sprayed out. When no lubricating grease is input into the oil inlet channel, the valve core structure can be controlled to be in the second state, so that the lubricating grease cannot be sprayed out, compressed air can be saved from being sprayed out from the oil injection channel, waste of the compressed air is finally avoided, the utilization rate of the compressed air is improved, and the problem that the lubricating grease cannot be sprayed out to a lubricating point due to insufficient pressure of the compressed air is avoided.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an injection valve provided by an embodiment of the present disclosure;

FIG. 2 isbase:Sub>A corresponding cross-sectional view taken along A-A of FIG. 1 inbase:Sub>A first state;

FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1;

FIG. 4 isbase:Sub>A corresponding cross-sectional view taken along A-A of FIG. 1 inbase:Sub>A second state;

FIG. 5 is a schematic structural diagram of a valve block provided in an embodiment of the present disclosure;

FIG. 6 is a cross-sectional view taken along the line C-C in FIG. 5;

FIG. 7 is a cross-sectional view taken along line D-D of FIG. 5;

FIG. 8 is a diagram illustrating a usage scenario of an injection valve provided in an embodiment of the present disclosure;

FIG. 9 is a top view of FIG. 8;

fig. 10 is a sectional view taken along the direction E-E in fig. 9.

The symbols in the drawings represent the following meanings:

1. a valve body; 11. a valve block; 12. plugging by screwing;

2. a valve core structure; 21. a top rod; 211. a first end bar; 212. an intermediate lever; 213. a second end bar; 22. a one-way valve; 221. a valve core; 2211. a second tapered surface; 222. a valve housing; 2221. a threaded sleeve; 2222. a limiting column; 2223. a first conical surface; 223. an elastic member;

3. a spray structure; 31. an ejection seat; 311. a first injection channel; 3111. a first sub-channel; 3112. a second sub-channel; 312. a second injection channel; 32. a nozzle;

101. an oil inlet channel; 102. an air intake passage; 103. an oil injection channel; 104. an air injection passage; 105. a communication channel;

100. a truss; 200. a lifting motor; 300. a rack.

Detailed Description

To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

The disclosed embodiment provides an injection valve, as shown in fig. 1, the injection valve comprises a valve body 1, a valve core structure 2 and an injection structure 3.

Fig. 2 isbase:Sub>A sectional view corresponding tobase:Sub>A first state alongbase:Sub>A directionbase:Sub>A-base:Sub>A in fig. 1, fig. 3 isbase:Sub>A sectional view alongbase:Sub>A direction B-B in fig. 1, and fig. 4 isbase:Sub>A sectional view corresponding tobase:Sub>A second state alongbase:Sub>A directionbase:Sub>A-base:Sub>A in fig. 1 (in whichbase:Sub>A directionbase:Sub>A-A, B-B in fig. 1 isbase:Sub>A corresponding sectional view cut along different thicknesses of the valve body 1), in conjunction with fig. 2-4, the valve body 1 has an oil inlet passage 101, an air inlet passage 102, an oil injection passage 103, an air injection passage 104, andbase:Sub>A communication passage 105 inside. The first end of the oil inlet channel 101, the first end of the air inlet channel 102, the first end of the oil injection channel 103 and the first end of the air injection channel 104 are respectively communicated with the communication channel 105, the second end of the oil inlet channel 101 is used for introducing lubricating grease into the valve body 1, the second end of the air inlet channel 102 is used for introducing compressed air into the valve body 1, the second end of the oil injection channel 103 is used for spraying lubricating grease, and the second end of the air injection channel 104 is used for spraying compressed air.

The spool structure 2 is movably located in the communication passage 105, and the spool structure 2 has a first state (see fig. 2) and a second state (see fig. 4). When the valve core structure 2 is in the first state, the communication channel 105 communicates the first end of the oil inlet channel 101 with the first end of the oil injection channel 103 and communicates the first end of the air inlet channel 102 with the first end of the air injection channel 104, and when the valve core structure 2 is in the second state, the valve core structure 2 separates the oil inlet channel 101 from the oil injection channel 103 and separates the air inlet channel 102 from the air injection channel 104.

The injection structure 3 is connected to the valve body 1 and to a second end of the oil injection channel 103 and a second end of the gas injection channel 104.

When the injection valve provided by the embodiment of the disclosure is applied to lubricating gears in a rack-and-pinion lifting system, when the valve core structure 2 is in the first state, the oil inlet channel 101 is communicated with the oil injection channel 103 through the communication channel 105, and the air inlet channel 102 is communicated with the air injection channel 104 through the communication channel 105, so that grease can be sprayed out of the injection structure 3 under the action of compressed air to lubricate the gears. When the valve core structure 2 is in the second state, the valve core structure 2 separates the oil inlet passage 101 from the oil injection passage 103, and simultaneously separates the air inlet passage 102 from the air injection passage 104, and at this time, neither the grease nor the compressed air can be ejected from the injection structure 3.

That is to say, in the above injection valve, can come the position of nimble control case structure 2 in valve body 1 according to whether grease gets into oil feed passageway 101, and then realize whether grease spouts outside valve body 1 under compressed air's effect. That is, when grease is introduced into the oil inlet passage 101, the valve element structure 2 is controlled to be in the first state, so that the grease can be smoothly sprayed out. When no lubricating grease is input into the oil inlet channel 101, the valve core structure 2 can be controlled to be in the second state, so that the lubricating grease cannot be sprayed out, compressed air can be saved, waste of the compressed air is avoided, the utilization rate of the compressed air is improved, and the problem that the lubricating grease cannot be sprayed out to a lubricating point due to insufficient pressure of the compressed air is solved.

Illustratively, the communication passage 105 is a straight passage, and extends through the valve body 1. The oil inlet passage 101 and the air inlet passage 102 are located on a first side of the communication passage 105, and the oil ejecting passage 103 and the air ejecting passage 104 are located on a second side of the communication passage 105. The first side and the second side of the communication passage 105 are opposite sides of the communication passage 105 in the length direction, respectively.

The arrangement mode of the above oil passages can simplify the arrangement of the oil inlet passage 101, the air inlet passage 102, the oil injection passage 103, the air injection passage 104 and the communication passage 105.

With continued reference to fig. 2 or 4, optionally, the poppet structure 2 includes a poppet 21 and a check valve 22. The check valve 22 is fixed in the communication passage 105, a first port of the check valve 22 communicates with the first end of the intake passage 102, and a second port of the check valve 22 communicates with the first end of the jet passage 104. The push rod 21 is movably located in the communication channel 105, one end of the push rod 21 abuts against a valve core 221 of the one-way valve, the push rod 21 is used for pushing the valve core 221 to enable the first valve port and the second valve port of the one-way valve 22 to be communicated when the pressure in the oil inlet channel 101 is larger than a preset value, and the one-way valve 22 is stopped when the pressure in the oil inlet channel 101 is smaller than the preset value.

In the implementation manner, when the pressure in the oil inlet channel 101 is greater than the preset value, the push rod 21 moves toward the valve element 221 of the check valve 22 and pushes the valve element 221 even under the action of the oil pressure, so that the first valve port and the second valve port of the check valve 22 are communicated, the oil inlet channel 101 is communicated with the oil injection channel 103, the air inlet channel 102 is communicated with the air injection channel 104, and when the pressure in the oil inlet channel 101 is less than the preset value, the check valve 22 is closed, so that the oil inlet channel 101 is not communicated with the oil injection channel 103, and the air inlet channel 102 is not communicated with the air injection channel 104.

For example, in actual use, when grease is input into the second end of the oil inlet channel 101, the pressure of the grease in the oil inlet channel 101 increases, and accordingly the grease enters the communication channel 105, the grease pushes the plunger 21 to move toward the valve element 221, so that a gap is formed between the first end of the plunger 21 and the inner wall of the valve body 1, and the grease can enter the oil injection channel 103 along the gap (see fig. 4). Meanwhile, when the plunger 21 moves, the valve element 221 moves, after the valve element 221 moves, the first valve port and the second valve port of the check valve 22 are communicated, compressed air enters the communication channel 105 from the second end of the air inlet channel 102, then enters the air injection channel 104 from the communication channel 105 through the first valve port and the second valve port of the check valve 22, and grease is smoothly sprayed out of the valve body 1 from the injection structure 3 under the action of the compressed air to lubricate the gear.

In contrast, when no grease is input or the grease pressure is low (lower than the preset value) at the second end of the oil inlet passage 101 (see fig. 2 again), the grease pressure in the oil inlet passage 101 is low, accordingly, the grease is not input into the communication passage 105, the grease does not push the plunger 21 to move toward the valve element 221, and the communication passage 105 cuts off the communication between the oil inlet passage 101 and the oil injection passage 103. Meanwhile, the first valve port and the second valve port in the check valve 22 are not communicated, the check valve 22 is closed, the check valve 22 cuts off the communication between the air inlet channel 102 and the air injection channel 104, compressed air cannot be sprayed out of the communication channel 105, namely the problem that the compressed air is still sprayed out of the valve body 1 when no lubricating grease is sprayed out is avoided, and the use of the compressed air is saved.

Optionally, the top rod 21 includes a first end rod 211, a middle rod 212, and a second end rod 213 connected in sequence, an outer diameter of the first end rod 211 and an outer diameter of the second end rod 213 are both smaller than an outer diameter of the middle rod 212, the middle rod 212 is in sealing fit with an inner wall of the communication channel 105, and the second end rod 213 abuts against the valve core 221.

The first end of the oil inlet channel 101 is located at one end, close to the first end rod 211, of the middle rod 212, when the valve core structure 2 is in the first state, the first end of the oil injection channel 103 is located at one end, close to the first end rod 211, of the middle rod 212, and when the valve core structure 2 is in the second state, the first end of the oil injection channel 103 is blocked by the side wall of the middle rod 212.

In the above implementation manner, the top rod 21 is provided with the first end rod 211, the middle rod 212 and the second end rod 213, so that a step surface can be formed by the difference in outer diameter between the first end rod 211 and the middle rod 212, and further, when grease enters the valve body 1 from the oil inlet passage 101 and enters the communication passage 105, the grease can rapidly act on the step surface to push the top rod 21 to move. Meanwhile, the outer diameter of the second end rod 213 is smaller than that of the middle rod 212, so that the gap between the top rod 21 and the communication channel 105 is larger, and compressed air can flow rapidly.

That is, the above structure of the plunger 21 enables the grease to quickly push the plunger 21 to move toward the valve element 221, while facilitating the flow of the compressed air in the communication passage 105.

Fig. 5 is a schematic structural view of a valve block provided in an embodiment of the present disclosure, fig. 6 is a sectional view taken along a direction C-C in fig. 5, and fig. 7 is a sectional view taken along a direction D-D in fig. 5, in combination with fig. 5-7. The valve block 11 is a cuboid block structure, and the oil inlet channel 101, the air inlet channel 102, the oil injection channel 103, the air injection channel 104 and the communication channel 105 are respectively located inside the valve block 11.

The plug 12 is located at one end of the communication channel 105, and when the valve core structure 2 is in the first state, the plug 12 is in contact with the first end rod 211.

In the above implementation manner, the valve body 1 is provided with the valve block 11 and the plug 12, so that the valve block 11 can provide an installation basis for the oil inlet passage 101, the air inlet passage 102, the oil injection passage 103, the air injection passage 104, the communication passage 105 and other components, and meanwhile, one end of the communication passage 105 can be plugged by the plug 12.

Referring again to fig. 2-4, optionally, the check valve 22 includes a valve sleeve 222, a resilient member 223, and a valve core 221. A valve housing 222 is inserted in the communication passage 105, and a first port is located on a side wall of the valve housing 222 and a second port is located at an end of the valve housing 222 near the plug 12. The elastic member 223 and the valve core 221 are located in the valve sleeve 222, and the elastic member 223 is located at one end of the valve core 221 away from the plug 12, and two ends of the elastic member respectively abut against the valve core 221 and the valve sleeve 222.

In the above implementation, the valve sleeve 222 is used to provide an installation basis for the valve core 221 and the elastic member 223, and can be matched with the valve core 221, so that the communication channel 105 can communicate the air inlet channel 102 with the air injection channel 104 when the valve core structure 2 is in the first state, and the communication channel 105 can separate the air inlet channel 102 from the air injection channel 104 when the valve core structure 2 is in the second state.

The elastic member 223 is used to reset the valve core 221, that is, when the valve core 221 is not pushed by the plunger 21, the valve core 221 can be reset, so that the first valve port and the second valve port of the valve sleeve 222 are not communicated.

Illustratively, in order to improve the sealing performance between the valve sleeve 222 and the valve block 11, when the valve sleeve 222 is screwed to the valve block 11, two sealing rings are disposed along the axial direction of the valve sleeve 222, and the two sealing rings are respectively located on two opposite sides of the first valve port.

Optionally, valve housing 222 includes a threaded sleeve 2221 and a retention post 2222, with retention post 2222 being inserted within threaded sleeve 2221 and threadedly coupled to threaded sleeve 2221. The elastic member 223 is sleeved on the limiting column 2222, and the elastic member 223 is abutted against the limiting column 2222.

In the above implementation, by arranging the valve sleeve 222 as the threaded sleeve 2221 and the position-limiting post 2222, the elastic member 223 can be provided with an installation base through the position-limiting post 2222, so that the elastic member 223 can be firmly assembled, and at the same time, the valve core 221 is provided with an installation base through the threaded sleeve 2221, and is matched with the valve core 221, and the above valve core structure 2 has two states.

In addition, in order to improve the sealing property between the stopper post 2222 and the nut 2221, a seal ring is also provided between the stopper post 2222 and the nut 2221.

Illustratively, the position limiting post 2222 is threadedly inserted into the threaded sleeve 2221, which facilitates the disassembly and assembly of the position limiting post 2222 on the valve body 1.

Alternatively, the inner wall of the valve sleeve 222 has a first tapered surface 2223 on the side facing the valve element 221, and the outer wall of the valve element 221 on the side facing the plunger rod 21 has a second tapered surface 2211. When the valve core structure 2 is in the second state, the first tapered surface 2223 and the second tapered surface 2211 are in sealing fit together.

In the above implementation, the cooperation between the first conical surface 2223 and the second conical surface 2211 can effectively improve the sealing performance between the valve core 221 and the thread insert 2221, so that when the valve core structure 2 is in the second state, the communication channel 105 can effectively cut off the communication between the intake channel 102 and the injection channel 103.

Optionally, the limiting column 2222 is a rod-shaped structure with a circular truncated cone structure, the circular truncated cone structure of the limiting column 2222 is in threaded connection with the threaded sleeve 2221, the rod-shaped structure of the limiting column 2222 is located in the threaded sleeve 2221, and the elastic member 223 is sleeved on the rod-shaped structure of the limiting column 2222.

In the above implementation manner, the limiting column 2222 is set to have the above structure, so that the stepped surface of the circular truncated cone structure can be pre-positioned and clamped with the thread insert 2221, and meanwhile, the installation foundation can be improved for the elastic member 223 through the rod-shaped structure of the limiting column 2222.

Optionally, the spray structure 3 comprises a spray seat 31 and a nozzle 32. The nozzle 32 is connected to the spray seat 31. The injection seat 31 is connected with the valve body 1, the injection seat 31 is internally provided with a first injection channel 311 and a second injection channel 312, the two ends of the first injection channel 311 are respectively communicated with the oil injection channel 103 and the nozzle 32, and the two ends of the second injection channel 312 are respectively communicated with the air injection channel 104 and the nozzle 32.

In the above-described implementation, the injection structure 3 is provided with the injection seat 31 and the nozzle 32, so that the injection seat 31 can be connected with the valve body 1 to provide a mounting base for the nozzle 32, and meanwhile, the injection seat 32 can be communicated with the oil injection channel 103 to inject grease in the oil injection channel 103 from the interior of the valve body 1 to lubricate gears and the like. The first injection passage 311 serves to introduce grease from the oil injection passage 103 into the nozzle 32, and the second injection passage 312 serves to introduce compressed air from the air injection passage 104 into the nozzle 32.

Illustratively, the injector seat 31 is fixed to the valve body 1 by screws, so that the injector seat 31 and the valve body 1 can be conveniently integrated.

Alternatively, second injection passage 312 is plural, and plural second injection passages 312 are arranged around first injection passage 311.

In the above implementation, the plurality of second injection channels 312 are circumferentially arranged on the periphery of the first injection channel 311 with the first injection channel 311 as the center, so that the compressed air can be arranged around the grease when entering the nozzle 32, thereby facilitating the injection of the grease.

Referring again to fig. 3 or 7, for example, to facilitate communication between the second injection passage 312 and the air injection passage 104, an annular groove is provided on an outer wall of the valve body 1, the annular groove is communicated with the air injection passage 104, and the second injection passages 312 are all communicated with the annular groove.

In addition, in order to improve the sealing property between the injection seat 31 and the valve body 1, a gasket is provided at a joint between the injection seat 31 and the valve body 1. A gasket is disposed within the annular groove.

Illustratively, the nozzle 32 is attached to the injector seat 31 by a lock nut and a washer. When the nozzle 32 and the injection seat 31 are installed, a washer is clamped between the nozzle 32 and the injection seat 31, and a locking nut is sleeved outside the nozzle 32 and the injection seat 31 in a threaded mode. This facilitates the detachable mounting of the nozzle 32 on the spray seat 31.

Referring again to fig. 2, alternatively, the first injection passage 311 includes a first sub-passage 3111 and a second sub-passage 3112 communicating with each other, the first sub-passage 3111 has an inner diameter larger than that of the second sub-passage 3112, the first sub-passage 3111 communicates with the oil injection passage 103, and the second sub-passage 3112 communicates with the interior of the nozzle 32.

In the above implementation, the first injection passage 311 is provided as the first sub-passage 3111 and the second sub-passage 3112, and the inner diameters of the first sub-passage 3111 and the second sub-passage 3112 may be different, so that when grease flows from the first sub-passage 3111 to the second sub-passage 3112, the flow rate of the grease is increased due to the reduction of the inner diameter, and the grease can be rapidly sprayed from the nozzle 32.

Fig. 8 is a usage scenario diagram of an injection valve provided in an embodiment of the present disclosure, which is used to lubricate a gear in a lifting system in conjunction with fig. 8. Wherein, the lifting system comprises a truss 100, a lifting motor 200, a rack 300 and the like.

Fig. 9 is a top view of fig. 8, and in conjunction with fig. 9, the truss 100 is a triangular truss having a pair of racks 300 attached at each apex. Each of the racks 300 of each pair is engaged with a gear of one of the lift motors 200.

Fig. 10 is a cross-sectional view taken along the direction E-E in fig. 9, and in conjunction with fig. 10, an injection valve provided in an embodiment of the present disclosure is connected to the truss 100, arranged in one-to-one correspondence with the lifting motors 200, and located at one side of the corresponding lifting motor 200, and the injection valve is used for lubricating gears of the lifting motors.

The above description is intended to be exemplary only and not to limit the present disclosure, and any modification, equivalent replacement, or improvement made without departing from the spirit and scope of the present disclosure is to be considered as the same as the present disclosure.

Claims (10)

1. Injection valve, characterized in that it comprises a valve body (1), a valve core structure (2) and an injection structure (3),

the valve body (1) is internally provided with a communication channel (105), an oil inlet channel (101), an air inlet channel (102), an oil spraying channel (103) and an air spraying channel (104), wherein the first end of the oil inlet channel (101), the first end of the air inlet channel (102), the first end of the oil spraying channel (103) and the first end of the air spraying channel (104) are respectively communicated with the communication channel (105), the second end of the oil inlet channel (101) is used for introducing lubricating grease into the valve body (1), the second end of the air inlet channel (102) is used for introducing compressed air into the valve body (1), the second end of the oil spraying channel (103) is used for spraying lubricating grease, and the second end of the air spraying channel (104) is used for spraying compressed air;

the valve core structure (2) is movably located in the communication channel (105), the valve core structure (2) has a first state and a second state, when the valve core structure (2) is in the first state, the communication channel (105) is communicated with the first end of the oil inlet channel (101) and the first end of the oil injection channel (103) and is communicated with the first end of the air inlet channel (102) and the first end of the air injection channel (104), and when the valve core structure (2) is in the second state, the valve core structure (2) cuts off the oil inlet channel (101) and the oil injection channel (103) and cuts off the air inlet channel (102) and the air injection channel (104);

the injection structure (3) is connected with the valve body (1) and is connected with the second end of the oil injection channel (103) and the second end of the air injection channel (104).

2. The injection valve according to claim 1, wherein the valve core structure (2) comprises a push rod (21) and a check valve (22), the check valve (22) is fixed in the communication channel (105), a first port of the check valve (22) is communicated with a first end of the intake channel (102), a second port of the check valve is communicated with a first end of the air injection channel (104), the push rod (21) is movably located in the communication channel (105), and one end of the push rod is abutted against a valve core (221) of the check valve (22), the push rod (21) is used for pushing the valve core (221) when the pressure in the oil inlet channel (101) is greater than a preset value, so that the first port and the second port of the check valve (22) are communicated, and the check valve (22) is stopped when the pressure in the oil inlet channel (101) is less than the preset value.

3. Injection valve according to claim 2, characterized in that the ejector pin (21) comprises a first end rod (211), an intermediate rod (212) and a second end rod (213) connected in sequence,

the outer diameter of the first end rod (211) and the outer diameter of the second end rod (213) are both smaller than the outer diameter of the middle rod (212), the middle rod (212) is in sealing fit with the inner wall of the communication channel (105), and the second end rod (213) abuts against the valve core (221);

the first end of the oil inlet channel (101) is located at one end, close to the first end rod (211), of the middle rod (212), when the valve core structure (2) is in the first state, the first end of the oil injection channel (103) is located at one end, close to the first end rod (211), of the middle rod (212), and when the valve core structure (2) is in the second state, the first end of the oil injection channel (103) is blocked by the side wall of the middle rod (212).

4. An injection valve according to claim 3, characterized in that the valve body (1) comprises a valve block (11) and a plug (12), the oil inlet passage (101), the air inlet passage (102), the oil injection passage (103), the air injection passage (104) and the communication passage (105) being located inside the valve block (11), respectively,

the plug (12) is located at one end of the communication channel (105), and when the valve core structure (2) is in the first state, the plug (12) is in contact with the first end rod (211).

5. The injection valve as recited in claim 4, characterized in that the check valve (22) comprises a valve sleeve (222), an elastic member (223) and the valve spool (221);

the valve sleeve (222) is inserted in the communication channel (105), the first valve port is positioned on the side wall of the valve sleeve (222), and the second valve port is positioned at one end of the valve sleeve (222) close to the plug (12);

the elastic piece (223) and the valve core (221) are positioned in the valve sleeve (222), the elastic piece (223) is positioned at one end, far away from the plug (12), of the valve core (221), and two ends of the elastic piece are respectively abutted against the valve core (221) and the valve sleeve (222).

6. The injection valve of claim 5 wherein said valve housing (222) includes a threaded sleeve (2221) and a retaining post (2222),

the limiting column (2222) is inserted into the threaded sleeve (2221) and is in threaded connection with the threaded sleeve (2221), the elastic piece (223) is sleeved on the limiting column (2222), and the elastic piece (223) abuts against the limiting column (2222).

7. The injection valve according to claim 6, wherein the side of the inner wall of the valve sleeve (222) facing the spool (221) has a first tapered surface (2223), and the side of the outer wall of the spool (221) facing the plunger rod (21) has a second tapered surface (2211);

when the valve core structure (2) is in the second state, the first conical surface (2223) and the second conical surface (2211) are in sealing fit together.

8. An injection valve according to any one of claims 1-7, characterized in that the injection structure (3) comprises an injection seat (31) and a nozzle (32);

the nozzle (32) is connected with the spray seat (31);

the injection seat (31) is connected with the valve body (1), a first injection channel (311) and a second injection channel (312) are arranged inside the injection seat (31), two ends of the first injection channel (311) are communicated with the oil injection channel (103) and the nozzle (32) respectively, and two ends of the second injection channel (312) are communicated with the air injection channel (104) and the nozzle (32) respectively.

9. The injection valve according to claim 8, characterized in that the second injection channel (312) is plural, and plural second injection channels (312) are arranged around the first injection channel (311).

10. The injection valve according to claim 8, characterized in that the first injection passage (311) comprises a first sub-passage (3111) and a second sub-passage (3112) communicating with each other, the first sub-passage (3111) having an inner diameter larger than the inner diameter of the second sub-passage (3112), the first sub-passage (3111) communicating with the injection passage (103), the second sub-passage (3112) communicating with the interior of the nozzle (32).

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