CN218459997U - Injection valve - Google Patents

Abstract

The utility model discloses an injection valve, which comprises an injection module, an air suction module and a surrounding baffle, wherein the injection module is provided with a jet orifice; the air suction module is connected with the injection module, an air suction cavity surrounding the injection port is formed between the air suction module and the injection module, a liquid outlet communicated with the air suction cavity and the outside is formed in the cavity wall of the air suction cavity, and the liquid outlet is positioned in the injection direction of the injection port so that liquid can be injected through the injection port and the liquid outlet; the air suction module is provided with an air suction channel communicated with the air suction cavity, and the air suction channel is used for being communicated with the negative pressure generating device; the enclosing baffle is arranged in the air suction cavity, the air suction cavity is internally divided into an air chamber and an annular air channel surrounding the air chamber, a plurality of air suction holes which are uniformly distributed are arranged along the circumferential direction of the enclosing baffle, the annular air channel is communicated with the air suction channel, and the jet orifice and the liquid outlet are communicated with the air chamber. The utility model discloses an injection valve, it not only can eliminate the satellite effectively and drip, still has good precision simultaneously.

Description

Injection valve

Technical Field

The utility model relates to a micro-droplet injection apparatus technical field especially relates to an injection valve.

Background

In the working process of the injection valve, after working liquid such as glue or solder paste is sprayed out of the injection valve, satellite drops can be generated besides main liquid drops, and the satellite drops can seriously influence the control precision of the injection valve on fluid, so that the product quality and the qualification rate of products are influenced. In the related art, the suction device is provided at the position of the ejection port of the ejection valve to remove the satellite droplets by suction under negative pressure, but the suction device can remove the satellite droplets but at the same time make the ejected main droplets biased to one side, so that the position of the ejected main droplets does not meet the precision requirement.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. To this end, the present invention provides an injection valve which not only can effectively eliminate satellite droplets, but also has good accuracy.

According to the embodiment of the utility model, the injection valve comprises an injection module, an air suction module and a baffle, wherein the injection module is provided with a jet orifice; the air suction module is connected with the injection module, an air suction cavity surrounding the injection port is formed between the air suction module and the injection module, a liquid outlet communicated with the air suction cavity and the outside is formed in the cavity wall of the air suction cavity, and the liquid outlet is positioned in the injection direction of the injection port so that liquid can be injected through the injection port and the liquid outlet; the air suction module is provided with an air suction channel communicated with the air suction cavity, and the air suction channel is communicated with the negative pressure generating device; the enclosing baffle is arranged in the air suction cavity, the air suction cavity is internally divided into an air chamber and an annular air channel surrounding the air chamber, a plurality of air suction holes which are uniformly distributed are arranged along the circumferential direction of the enclosing baffle, the annular air channel is communicated with the air suction channel, and the jet orifice and the liquid outlet are communicated with the air chamber.

According to the utility model discloses injection valve has following beneficial effect at least:

the injection valve of the embodiment is provided with the air suction module on the injection module to form an air suction cavity surrounding the injection port, and the air suction cavity can be communicated with the negative pressure generating device through the air suction channel, so that satellite drops generated by the injection port can be eliminated through negative pressure, and the satellite drops are prevented from influencing the control precision of the single liquid injection amount of the injection valve; meanwhile, the injection valve of the embodiment is characterized in that the enclosing baffle is arranged in the air suction cavity, the air suction cavity is divided into the air chamber and the annular air channel by the enclosing baffle, the annular air channel is communicated with the air chamber through a plurality of air suction holes uniformly distributed along the circumference of the enclosing baffle, the jet orifice and the liquid outlet are correspondingly communicated with the air chamber, and the annular air channel is correspondingly communicated with the air suction channel.

According to the utility model discloses a jet valve, be provided with bellied wind-guiding ring on the chamber wall in chamber of breathing in, the wind-guiding ring is located the plenum and sets up around the liquid outlet, and the protruding height of wind-guiding ring is less than or equal to the hole height to wind-guiding ring place chamber wall that induced drafts, and the medial surface of wind-guiding ring is close to the outside direction slope of hole one side to wind-guiding ring that induced drafts.

According to some embodiments of the present invention, the injection module is provided with a nozzle portion protruding toward one side of the air guide ring, the nozzle portion is formed in a conical shape or a truncated cone shape, and the injection port is formed in the nozzle portion.

According to the utility model discloses an injection valve, the module of breathing in is provided with the mounting hole including the connecting block on the connecting block, and the injection module is installed in the mounting hole, and the part pore wall of mounting hole with enclose and form annular air duct between the fender, the passageway of breathing in sets up in the connecting block, and one end extends to the pore wall of mounting hole.

According to the utility model discloses an injection valve, the module of breathing in is still including the air guide pad, and the inner wall that the mounting hole is close to the one end of enclosing the fender sets up annular butt platform, and air guide ring and liquid outlet set up in the air guide pad, the relative both sides at the edge of air guide pad respectively with enclose fender and annular butt platform butt.

According to the utility model discloses an injection valve of some embodiments, still including drive module, wherein drive module is including the valve body, actuating lever and driving piece, spray the module including injection pipe and impact member, the injection pipe is installed in the mounting hole, and the jet sets up in the one end of injection pipe towards the liquid outlet, wear to locate the injection pipe impact member slidable, connecting block detachably connects in the valve body, the actuating lever slidable sets up in the valve body, and one end extend to in the mounting hole and with the impact member butt, the driving piece sets up in the valve body and is used for driving the actuating lever slip.

According to the utility model discloses an injection valve of some embodiments is provided with the sealing washer between the week side of injection pipe and the inner wall of mounting hole.

According to the utility model discloses an injection valve of some embodiments, the module of breathing in is including the filter, and the filter sets up in the passageway of breathing in.

According to the utility model discloses an injection valve of some embodiments, the suction channel is including first passageway, filter chamber and second passageway, first passageway one end intercommunication annular duct, and other end intercommunication filter chamber, second passageway one end intercommunication filter chamber, the other end are used for communicateing negative pressure generating device, and filter detachably sets up in the filter chamber.

According to the utility model discloses an injection valve of some embodiments, filter threaded connection is in the filter chamber, and the filter is close to the open-ended one end of filter chamber and is provided with twist groove or handle.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic cross-sectional structural view of an injection valve according to an embodiment of the present invention;

FIG. 2 is a sectional view of a coupling structure of the suction module and the spray module shown in FIG. 1;

FIG. 3 is a schematic cross-sectional view of the connecting block shown in FIG. 2;

FIG. 4 is a cross-sectional structural schematic of the jetting module shown in FIG. 2;

FIG. 5 is an enlarged view of a portion of the area A in FIG. 2;

FIG. 6 is a schematic cross-sectional view of the drive module shown in FIG. 1

FIG. 7 is a plot of the airflow trace for the injection valve of FIG. 1 in the suction cavity position under simulation.

Reference numerals are as follows:

an injection module 100; an injection pipe 110; a nozzle portion 111; an injection port 112; a liquid inlet 113; an elastic member 120; a fence 130; an air suction hole 131; an impact member 140; a seal ring 150; a suction module 200; a suction passage 210; a filter chamber 211; a first channel 212; a second channel 213; an aspiration lumen 220; an air chamber 221; an annular air duct 222; a filter 230; a torsion groove 231; an air guide pad 240; a wind guide ring 241; a liquid outlet 242; a connecting block 250; a mounting hole 251; an annular abutment land 252; a feed channel 253; a feed channel 254; a driving module 300; a valve body 310; a drive rod 320; a drive member 330; a liquid storage module 400; a reservoir 410; an infusion tube 420; a spiral feed module 500; a motor 510; a screw feed mechanism 520.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to, for example, the upper, lower, left, right, front, rear, etc., is the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of 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, should not be construed as limiting the present invention.

In the description of the present invention, if there are first and second descriptions for distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the precedence of the indicated technical features.

In the description of the present invention, unless there is an explicit limitation, the terms such as setting, installing, connecting, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meaning of the terms in the present invention by combining the specific contents of the technical solution.

An injection valve according to an embodiment of the present invention will be described below with reference to fig. 1 to 6.

Referring to fig. 1, 2 and 5, an injection valve according to an embodiment of the present invention includes an injection module 100, an air suction module 200 and a baffle 130, wherein the injection module 100 is provided with an injection port 112; the air suction module 200 is connected with the injection module 100, an air suction cavity 220 surrounding the injection port 112 is formed between the air suction module 200 and the injection module 100, a liquid outlet 242 communicating the air suction cavity 220 with the outside is arranged on the cavity wall of the air suction cavity 220, and the liquid outlet 242 is positioned in the injection direction of the injection port 112, so that liquid can be injected through the injection port 112 and the liquid outlet 242; the air suction module 200 is provided with an air suction channel 210 communicated with an air suction cavity 220, and the air suction channel 210 is used for being communicated with a negative pressure generating device; the enclosure 130 is disposed in the air suction cavity 220, and the air suction cavity 220 is separated into an air chamber 221 and an annular air duct 222 surrounding the air chamber 221, the enclosure 130 is circumferentially provided with a plurality of air suction holes 131 uniformly distributed, the annular air duct 222 is communicated with the air suction channel 210, and the injection port 112 and the liquid outlet 242 are communicated with the air chamber 221.

It can be understood that, in the operation of the injection valve of the present embodiment, the suction channel 210 is communicated with the negative pressure generating device, so that the suction cavity 220 communicated with the suction channel 210 can generate negative pressure, and the satellite droplets generated by the ejection port 112 can be eliminated by means of the negative pressure, thereby preventing the satellite droplets from affecting the control precision of the single liquid injection amount of the injection valve; meanwhile, referring to fig. 7, since the enclosure 130 is disposed in the air intake cavity 220, and the air intake cavity 220 is partitioned by the enclosure 130 to form the air chamber 221 and the annular air duct 222, and the annular air duct 222 and the air chamber 221 are communicated through the plurality of air suction holes 131 uniformly distributed along the circumferential direction of the enclosure 130, and the injection port 112 and the liquid outlet 242 are both correspondingly communicated with the air chamber 221, and the annular air duct 222 is correspondingly communicated with the air suction channel 210, when the injection valve operates, air in the air chamber 221 can simultaneously flow to the annular air duct 222 and the air suction channel 210 through the plurality of air suction holes 131, that is, the air field in the air chamber 221 is more uniformly distributed in the circumferential direction, so that the problem of position deviation caused by the influence of a negative pressure air field when the main liquid drops are ejected is remarkably reduced, and the position accuracy of the liquid sprayed by the injection valve can be effectively improved.

It can be understood that, in order to prevent the working fluid from entering the negative pressure generating device and damaging the negative pressure generating device, referring to fig. 2 and 3, in one embodiment of the present invention, the suction module 200 includes a filter 230, and the filter 230 is disposed in the suction channel 210, so that the working fluid sucked into the suction channel 210 can be filtered by the filter 230.

Referring to fig. 3, in particular, the suction passage 210 includes a filter chamber 211 for mounting the filter 230, and the filter 230 is detachably disposed in the filter chamber 211 to facilitate replacement or cleaning of the filter device; specifically, in order to communicate the filter cavity 211 with the annular air passage, the air suction passage 210 further includes a first passage 212, one end of the first passage 212 communicates with the annular air duct 222, and the other end communicates with the filter cavity 211; meanwhile, in order to communicate the filter cavity 211 with the negative pressure generating device, the air suction channel 210 further comprises a second channel 213, one end of the second channel 213 is communicated with the filter cavity 211, and the other end is used for communicating with the negative pressure generating device.

It will be appreciated that, referring to fig. 2, in the present embodiment, the filter 230 is screw-coupled to the filter chamber 211, and a twist groove 231 is provided at an end of the filter 230 near the opening of the filter chamber 211 to facilitate the filter 230 to be unscrewed from the filter chamber 211 by a tool such as a screwdriver.

It should be understood that in other embodiments, a handle may be optionally provided at the end of filter 230 adjacent the opening of filter cavity 211, such that the handle may be grasped to manually rotate filter 230 out of filter cavity 211.

It is understood that, in the present embodiment, in order to facilitate the connection of the negative pressure generating means through the vacuum pipe, the suction module 200 is connected with a vacuum pipe joint, and one end of the second passage 213 communicates with the vacuum pipe joint.

It can be understood that, referring to fig. 5, in an embodiment, a raised air guiding ring 241 is disposed on a cavity wall of the air suction cavity 220, the air guiding ring 241 is located in the air chamber 221 and disposed around the liquid outlet 242, a height of the raised air guiding ring 241 is less than or equal to a height from the air suction hole 131 to the cavity wall where the air guiding ring 241 is located, an inner side surface of the air guiding ring 241 inclines toward an outer side of the air guiding ring 241 near the side of the air suction hole 131, so that after external air enters the air chamber 221 through the liquid outlet 242, an air flow located at a lower layer of the air chamber 221 can smoothly flow to the air suction hole 131 along the inclined inner side surface of the air guiding ring 241, thereby reducing wind resistance to improve an effect of eliminating satellite droplets.

Further, referring to fig. 5, in this embodiment, specifically, the injection module 100 is provided with the nozzle portion 111 protruding toward the air guiding ring 241, the nozzle portion 111 is provided in a conical shape, and the injection port 112 is provided on the nozzle portion 111, so that the air on the upper layer of the air chamber 221 can flow toward the air suction hole 131 of the enclosure 130 along the inclined conical surface of the nozzle portion 111, thereby further reducing the wind resistance, increasing the air flow velocity in the air chamber 221, and further improving the effect of eliminating the satellite droplets. Also, in order to achieve a better satellite elimination effect and a better main droplet deviation prevention effect, in the present embodiment, specifically, the central axis of the nozzle portion 111 is disposed in line with the central axis of the enclosure 130, and the ejection port 112 is disposed at the center of the nozzle portion 111.

It should be understood that the nozzle portion 111 may be alternatively configured in a truncated cone shape in other examples, rather than in a conical shape.

It can be understood that, referring to fig. 2, 3 and 5, the air suction module 200 includes a connection block 250, and in order to connect the injection module 100, a mounting hole 251 is provided on the connection block 250, the injection module 100 is mounted in the mounting hole 251, and a suction cavity 220 is formed between part of the wall of the mounting hole 251 and the injection module 100, a circular air channel 222 is formed between part of the wall of the mounting hole 251 and the enclosure 130, and the suction channel 210 is provided on the connection block 250, and has one end extending to the wall of the mounting hole 251; with the above-described structure, the injection module 100 can be separated from the suction module 200 when the injection valve stops operating, thereby facilitating the cleaning of the working fluid adhered to the air path wall of the annular air path 222 and the inner wall of the air chamber 221.

Referring to fig. 2 to 5, in one embodiment of the present invention, the connection block 250 not only is used to form a structure for transmitting negative pressure such as the suction chamber 220 and the suction channel 210, but also forms a valve seat of the suction module 200, and the injection module 100 is integrally and detachably mounted in the mounting hole 251. And, specifically, the spray module 100 includes the spray pipe 110 and the impact member 140, the spray pipe 110 is installed in the installation hole 251, the spray port 112 is disposed at one end of the spray pipe 110 facing the liquid outlet 242, and the impact member 140 slidably penetrates through the spray pipe 110, so that the working liquid in the spray pipe 110 can be sprayed out of the spray port 112 by driving the impact member 140 to move in a direction close to the spray port 112. Meanwhile, in order to realize the automatic reset of the impact member 140, the injection module 100 further includes an elastic member 120, two ends of the elastic member 120 respectively abut against the inner walls of the impact member 140 and the injection pipe 110, and are used for driving the impact member 140 to slide and reset in a direction away from the injection port 112, and the elastic member 120 may selectively adopt a butterfly spring or a compression spring, etc. It should be understood that the impact member may be a plunger or a striker, depending on the nature of the working fluid, etc.

It can be understood that, referring to fig. 1 and fig. 6, in this embodiment, the injection valve further includes a driving module 300, where the driving module 300 includes a valve body 310, a driving rod 320, and a driving member 330, the connecting block 250 is detachably connected to the valve body 310, the driving rod 320 is slidably disposed on the valve body 310, and one end of the driving rod 320 extends into the mounting hole 251 and abuts against the impact member 140, and the driving member 330 is disposed on the valve body 310 and is used for driving the driving rod 320 to slide, so that the driving member 330 can drive the impact member 140 to slide in the injection pipe 110 by driving the driving rod 320 to slide. By providing the connection block 250 in a form detachably connected to the valve body 310, the driving module 300 can be separated from the suction module 200 and the injection module 100 when the injection valve stops operating, thereby further facilitating cleaning.

It can be understood that, referring to fig. 6, in the present embodiment, the driving member 330 is a piezoelectric ceramic rod, and one end of the piezoelectric ceramic rod abuts against the driving rod 320, so that the piezoelectric ceramic rod can drive the driving rod 320 to slide after being electrically expanded.

It should be understood that in other examples, the driving member 330 may be other types of driving devices such as an air cylinder, and the driving member 330 is not limited in particular.

It should be understood that the enclosure 130 may be provided as a separate component, or may be provided as an auxiliary structure of one of the components of the injection module 100 and the air suction module 200, and is not particularly limited as long as it can separate the air suction chamber 220 into two spaces, namely, the annular air duct 222 and the air chamber 221; referring to fig. 5, in the present embodiment, specifically, the enclosure 130 is disposed at an end of the injection pipe 110 facing the liquid outlet 242, and the enclosure 130 is disposed around the nozzle portion 111.

It can be understood that, in the present embodiment, specifically, a plurality of first connection holes are provided on the connection block 250, a plurality of second connection holes corresponding to the first connection holes one to one are provided on the valve body 310, and the connection block 250 is connected to the valve body 310 by bolts penetrating through the first connection holes and the second connection holes.

It should be understood that, in other embodiments, the connection block 250 may also be connected to the valve body 310 by other detachable connection methods such as a movable buckle, etc., as long as it is convenient to separate the driving module 300 from the connection block 250 during cleaning, and the detachable connection method of the connection block 250 and the valve body 310 is not particularly limited herein.

It can be understood that, in order to ensure the airtightness of the installation between the connection block 250 and the injection module 100, referring to fig. 2 and 5, in the present embodiment, specifically, a sealing ring 150 is disposed between the circumferential side surface of the injection pipe 110 and the inner wall of the installation hole 251, so as to prevent air from entering the annular air duct 222 through a gap between the injection pipe 110 and the inner wall of the installation hole 251, thereby preventing the satellite drop elimination effect from being affected.

It will be appreciated that, with reference to fig. 1-4, in the present embodiment, the injection valve further includes a reservoir module 400 and a screw feed module 500; the spiral feeding module 500 comprises a motor 510 and a spiral feeding mechanism 520, an output shaft of the motor 510 is connected with the spiral feeding mechanism 520, the motor 510 and the spiral feeding mechanism 520 are both connected to the connecting block 250, a liquid inlet 113 communicated with the interior of the injection pipe 110 is formed in the pipe wall of the injection pipe 110, a feeding channel 253 with one end communicated with a discharge port of the spiral feeder is formed in the connecting block 250, and the other end of the feeding channel 253 extends to the hole wall of the mounting hole 251 and is opposite to the liquid inlet 113 of the injection pipe 110; the liquid storage module 400 comprises a liquid storage cylinder 410 and a liquid conveying pipe 420, one end of the liquid conveying pipe 420 is connected with the liquid storage cylinder 410, the other end of the liquid conveying pipe 420 is connected to the connecting block 250 through a pipe joint, and a feeding channel 254 communicated with the pipe joint and the spiral feeding mechanism 520 is arranged on the connecting block 250; so that the working fluid in the reservoir 410 can enter the screw feeding mechanism 520 through the fluid pipe 420, the pipe joint and the feeding channel 254, and the screw feeding mechanism 520 can deliver the working fluid into the injection pipe 110 through the discharge port and the feeding channel 253 under the driving of the motor 510. It is to be understood that, since the screw feeding mechanism 520 is an existing component, detailed description about the screw feeding mechanism 520 will not be provided herein.

It can be understood that, referring to fig. 2 and fig. 5, in the present embodiment, the air suction module 200 includes an air guide pad 240, an annular abutting table 252 is disposed on an inner wall of one end of the mounting hole 251 close to the enclosure 130, an air guide ring 241 and the liquid outlet 242 are disposed on the air guide pad 240, and two opposite sides of an edge of the air guide pad 240 abut against the enclosure 130 and the annular abutting table 252, respectively. In the above structure, by providing the air guide ring 241 and the liquid outlet 242 on the air guide pad 240, when the injection valve stops operating and cleaning, the air guide pad 240 can be taken out from the mounting hole 251, thereby further facilitating cleaning of the working liquid attached to the liquid outlet 242 and the air guide ring 241; meanwhile, the air guide pad 240 may be made of a flexible material such as rubber or silica gel, so as to improve the air tightness of the annular air duct 222.

It should be understood that in other embodiments, the mounting hole 251 may alternatively be a blind hole, and the air guiding ring 241 and the liquid outlet 242 may be directly disposed at the bottom of the mounting hole 251.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. An injection valve, comprising:

an injection module provided with an injection port;

the air suction module is connected with the injection module, an air suction cavity surrounding the injection port is formed between the air suction module and the injection module, a liquid outlet communicating the air suction cavity with the outside is formed in the cavity wall of the air suction cavity, and the liquid outlet is positioned in the injection direction of the injection port so that liquid can be sprayed out through the injection port and the liquid outlet; the air suction module is provided with an air suction channel communicated with the air suction cavity, and the air suction channel is used for being communicated with a negative pressure generating device;

enclose and keep off, set up in the intracavity of breathing in, and be in the intracavity of breathing in separate the plenum and encircle the annular wind channel of plenum, enclose and keep off along a plurality of induced drafts holes that circumference set up evenly distributed, annular wind channel intercommunication the passageway of breathing in, the jet with the liquid outlet all with the plenum intercommunication.

2. The injection valve of claim 1, wherein a raised air guiding ring is disposed on a wall of the air suction chamber, the air guiding ring is located in the air chamber and surrounds the liquid outlet, a height of the raised air guiding ring is less than or equal to a height from the air suction hole to a wall of the air guiding ring, and an inner side surface of the air guiding ring, which is close to the air suction hole, is inclined toward an outer side of the air guiding ring.

3. The injection valve of claim 2, wherein the injection module is provided with a nozzle portion protruding toward one side of the air guide ring, the nozzle portion is provided in a conical shape or a truncated cone shape, and the injection port is provided in the nozzle portion.

4. The injection valve of claim 2, wherein the air suction module comprises a connecting block, a mounting hole is formed in the connecting block, the injection module is mounted in the mounting hole, the annular air duct is formed between part of the hole wall of the mounting hole and the enclosure, the air suction channel is arranged in the connecting block, and one end of the air suction channel extends to the hole wall of the mounting hole.

5. The injection valve of claim 4, wherein the air suction module further comprises an air guide pad, an annular abutting table is disposed on an inner wall of the mounting hole near one end of the enclosure, the air guide ring and the liquid outlet are disposed on the air guide pad, and two opposite sides of an edge of the air guide pad abut against the enclosure and the annular abutting table respectively.

6. The injection valve as claimed in claim 4, further comprising a driving module, wherein the driving module includes a valve body, a driving rod and a driving member, the injection module includes an injection pipe and an impact member, the injection pipe is mounted in the mounting hole, the injection port is disposed at an end of the injection pipe facing the liquid outlet, the impact member slidably penetrates the injection pipe, the connecting block is detachably connected to the valve body, the driving rod is slidably disposed in the valve body, and an end of the driving rod extends into the mounting hole and abuts against the impact member, and the driving member is disposed in the valve body and is used for driving the driving rod to slide.

7. The injection valve of claim 6 wherein a seal is disposed between the peripheral side surface of the injection pipe and the inner wall of the mounting hole.

8. An injection valve according to any one of claims 1 to 7 wherein the suction module includes a filter, the filter being located in the suction passage.

9. The injection valve of claim 8, wherein the air suction passage comprises a first passage, a filter chamber and a second passage, one end of the first passage is communicated with the annular air duct, the other end of the first passage is communicated with the filter chamber, one end of the second passage is communicated with the filter chamber, the other end of the second passage is communicated with a negative pressure generating device, and the filter is detachably arranged in the filter chamber.

10. An injection valve according to claim 9 wherein the filter is threaded into the filter chamber and the end of the filter adjacent the opening of the filter chamber is provided with a twist groove or handle.

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