Hot melt adhesive screw valve structure with leakage stopping function

Abstract

The invention relates to the technical field of gluing, in particular to a hot melt adhesive screw valve structure with a leakage stoppage function, which comprises a runner module, a rotor component, a leakage stoppage component and an adjusting component, an adhesive injection stator is mounted in a conveying channel in the runner module, the rotor component comprises a rotor screw and a rotary power part, the rotor screw is rotatably mounted in the adhesive injection stator, and the rotary power part is mounted in the runner module. The rotating shaft of the rotating power piece is fixedly connected with one end of the rotor screw rod, the leakage stopping assembly comprises a leakage stopping plate, the leakage stopping plate is used for sealing the glue outlet end, and the adjusting assembly comprises a transmission shaft, a centrifugal sleeve piece and a movable arc cover. When the rotary power piece stops rotating, the rotor screw is in a static state at the moment, and the glue outlet end of the conveying channel is sealed through the leakage stopping plate, so that the common glue leakage and seepage phenomena caused by the fact that a channel of an existing screw valve is not closed tightly are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of glue coating, in particular to a hot melt adhesive screw valve structure with a leak-proof function. Background Art

[0002] Hot melt adhesive is a plastic adhesive. Within a certain temperature range, its physical state will change with the change of temperature, but the chemical properties remain unchanged. The hot melt adhesive currently used is usually solid at room temperature and will become a flowable viscous liquid after heating. At present, hot melt adhesive is often required to use a screw valve for dispensing or filling operations during industrial processing.

[0003] The screw valve mainly controls the flow and speed of hot melt adhesive by rotating the screw to achieve precise glue amount control. When the motor drives the screw to rotate, the screw pushes the hot melt adhesive to move along its spiral groove, thereby achieving the delivery of hot melt adhesive. By controlling the speed and rotation direction of the motor, the flow and speed of the hot melt adhesive can be precisely controlled.

[0004] At present, the sealing performance of screw valves is greatly affected by the processing accuracy of the screw or stator. Long-term wear of the stator or the use of low-viscosity hot melt adhesive dispensing operations often leads to loose closure of the screw valve channel, widespread glue leakage and seepage, resulting in waste of hot melt adhesive.

[0005] The existing traditional screw valve leakage prevention method often needs to rely on improving the screw valve stator processing technology, or regularly checking and replacing components to prevent hot melt adhesive dripping, which cannot fundamentally solve the problem of hot melt adhesive dripping. Summary of the invention

[0006] The purpose of the present invention is to provide a hot melt adhesive screw valve structure with a leak-proof function to solve the above-mentioned technical problems.

[0007] To achieve the above object, the present invention provides a hot melt adhesive screw valve structure with a leak-proof function, comprising:

[0008] The flow channel module has a glue inlet joint and a glue dispensing tube installed at both ends, and a conveying channel for the glue liquid to flow is provided therein, a glue injection stator is installed in the conveying channel, and a glue dispensing tube is detachably installed at the glue outlet end of the conveying channel;

[0009] The rotor assembly includes a rotor screw and a rotary power piece, wherein the rotor screw is rotatably mounted in the injection stator, and the rotary power piece is fixedly mounted on the outside of the flow channel module, and its rotary shaft is fixedly connected to one end of the rotor screw;

[0010] The leak-proof assembly includes a leak-proof plate and a transmission plate. The leak-proof plate is slidably mounted on the glue outlet end of the conveying channel and the leak-proof plate seals the glue outlet end. The transmission plate is slidably mounted in a guide groove provided on the flow channel module, one end of the transmission plate is fixedly connected to the leak-proof plate, and the other end extends out of the flow channel module.

[0011] The regulating assembly includes a transmission shaft, a centrifugal kit and a movable arc cover, wherein the transmission shaft is rotatably mounted on the outside of the flow channel module and is transmission-connected to the rotary shaft of the rotary power member through a No. 1 transmission assembly, the centrifugal kit is mounted on the outside of the transmission shaft, and the movable arc cover is elastically mounted on the outside of the flow channel module and is transmission-connected to the transmission plate through a No. 2 transmission assembly;

[0012] The rotary power part rotates to drive the rotor screw to rotate and feed in the glue injection stator, and the transmission shaft rotates to drive the centrifugal kit to rotate centrifugally, drive the movable arc cover to slide linearly, and drive the transmission plate and the leak-proof plate to slide, so as to open the glue outlet end of the conveying channel.

[0013] As a further solution of the present invention, the rotating power member is a dual-axis synchronous motor, and the dual-axis synchronous motor is different from the rotating shaft connected to one end of the rotor assembly and is connected to the transmission shaft through a No. 1 transmission assembly.

[0014] As a further solution of the present invention, the first transmission assembly includes a transmission belt, a first transmission wheel and a second transmission wheel;

[0015] The first transmission wheel and the second transmission wheel are coaxially mounted on the ends of the rotary shaft and the transmission shaft, and the first transmission wheel and the second transmission wheel are connected via a transmission belt.

[0016] As a further solution of the present invention, the centrifugal kit includes a guide bracket and multiple groups of centrifugal sliders;

[0017] The guide bracket is fixedly installed on the outside of the transmission shaft, and multiple groups of guide grooves are evenly opened on its circumferential side along the radial direction of the transmission shaft. Multiple groups of centrifugal sliders are slidably installed in the corresponding guide grooves, and an abutment ball is fixedly installed on the end of the centrifugal slider away from the transmission shaft.

[0018] As a further solution of the present invention, the upper ends of the plurality of groups of centrifugal sliding blocks are hinged with connecting rods, and one end of the plurality of groups of connecting rods is hinged with a synchronous ring slidably mounted on the transmission rod.

[0019] As a further solution of the present invention, the movable arc cover is slidably installed on the fixed bracket outside the flow channel module through multiple groups of telescopic connecting rods, and the sliding direction is along the axial direction of the transmission shaft, and the bottom of the movable arc cover is elastically connected to the fixed bracket through a connecting spring, and the upper inner wall of the movable arc cover abuts against the abutment ball at the end of the centrifugal slider.

[0020] As a further solution of the present invention, the second transmission assembly includes a ball screw, a ball nut, a transmission gear ring and a transmission rack;

[0021] The ball screw is fixedly mounted on the bottom of the movable arc cover, the ball nut is rotatably mounted on a fixed bracket outside the flow channel module and is spirally driven with the ball screw, the transmission gear ring is coaxially mounted on the outside of the ball nut, the transmission rack is fixedly mounted on a transmission bracket connected to the outer end of the transmission plate and is meshed with the transmission gear ring.

[0022] As a further solution of the present invention, there are two groups of leak-proof plates, which are correspondingly connected to two groups of transmission brackets, and the transmission racks on the two groups of transmission brackets are respectively meshed and connected to the two sides of the transmission gear ring.

[0023] Compared with the prior art, the present invention provides a flow channel module, a rotor assembly, a leak-stop assembly and an adjustment assembly. When the present invention is in a shutdown state, the leak-stop plate in the leak-stop assembly seals the glue outlet end. Specifically, during use;

[0024] 1. The leak-stopping plate of the present invention can seal the glue outlet end of the conveying channel when the glue dispensing process is not being performed, so as to prevent the hot melt glue from leaking through the gap between the glue injection stator and the rotating screw, causing the hot melt glue to drip. When the glue dispensing operation is being performed, the dual-axis power motor is turned on, and the transmission shaft, centrifugal slider, movable arc cover, ball screw, ball nut, transmission gear ring and transmission rack drive the leak-stopping plate to move and slide, open the glue outlet end of the conveying channel, and perform the glue dispensing operation;

[0025] 2. The displacement distance of the leak-stop plate, the downward movement distance of the movable shield, and the outward sliding stroke of the centrifugal slider correspond synchronously in sequence, so that when the rotation speed of the dual-axis synchronous motor corresponds to the displacement distance of the leak-stop plate, the rotation speed of different rotor screws matches the corresponding size of the conveying channel opening, thereby achieving the dispensing and conveying efficiency of dispensing tubes of different coarseness specifications, and adjusting the size of the corresponding conveying channel opening to avoid uneven glue delivery speed, which may cause uneven distribution of hot melt adhesive during coating or pouring. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The diagram is a plan view of a hot melt adhesive screw valve structure with a leak-proof function in the present invention.

[0027] Figure 2 It is a bottom view schematic diagram of a hot melt adhesive screw valve structure with a leak-proof function in the present invention.

[0028] Figure 3 It is an internal cross-sectional view of the flow channel module in the present invention.

[0029] Figure 4It is a top view schematic diagram of a hot melt adhesive screw valve structure with a leak-proof function in the present invention.

[0030] Figure 5 For the present invention Figure 4 A magnified schematic diagram of center A.

[0031] Figure 6 It is a bottom schematic diagram of a hot melt adhesive screw valve structure with a leak-proof function in the present invention.

[0032] In the attached drawings: 1. flow channel module; 101. glue inlet joint; 102. glue dispensing tube; 103. conveying channel; 2. dual-axis synchronous motor; 201. rotating shaft; 3. transmission shaft; 4. transmission assembly No. 1; 401. transmission wheel No. 1; 402. transmission wheel No. 2; 403. transmission belt; 5. centrifugal kit; 501. guide bracket; 502. centrifugal slider; 503. abutment ball; 504. connecting rod; 505. synchronous ring; 6. movable arc cover; 7. connecting spring; 8. telescopic connecting rod; 9. fixed bracket; 10. transmission assembly No. 2; 1001. ball screw; 1002. ball nut; 1003. transmission gear ring; 1004. transmission rack; 11. leak-stop plate; 12. transmission plate; 13. transmission bracket; 14. rotor screw; 15. guide tube. DETAILED DESCRIPTION

[0033] The technical solution of the present invention is further described in detail below in conjunction with specific implementation methods.

[0034] like Figures 1 to 4 As shown, in an embodiment of the present invention, a hot melt adhesive screw valve structure with a leak-proof function includes:

[0035] The flow channel module 1 has a glue inlet joint 101 and a glue dispensing tube 102 installed at both ends thereof, and a delivery channel 103 for the flow of glue is provided therein, a glue injection stator is installed in the delivery channel 103, and the glue outlet end of the delivery channel 103 is detachably provided with the glue dispensing tube 102;

[0036] The rotor assembly includes a rotor screw 14 and a rotary power member. The rotor screw 14 is rotatably mounted in the injection stator. The rotary power member is fixedly mounted on the outside of the flow channel module 1, and its rotary shaft 201 is fixedly connected to one end of the rotor screw 14.

[0037] The leak-proof assembly includes a leak-proof plate 11 and a transmission plate 12. The leak-proof plate 11 is slidably mounted on the glue outlet end of the conveying channel 103, and the leak-proof plate 11 seals the glue outlet end. The transmission plate 12 is slidably mounted in a guide groove provided on the flow channel module 1, one end of which is fixedly connected to the leak-proof plate 11, and the other end extends out of the flow channel module 1;

[0038] The adjustment assembly includes a transmission shaft 3, a centrifugal set 5 and a movable arc cover 6. The transmission shaft 3 is rotatably mounted on the guide tube 15 outside the flow channel module 1 and is connected to the rotary shaft 201 of the rotary power member through the first transmission assembly 4. The centrifugal set 5 is mounted on the outside of the transmission shaft 3. The movable arc cover 6 is elastically mounted on the outside of the flow channel module 1 and is connected to the transmission plate 12 through the second transmission assembly 10.

[0039] The rotary power part rotates to drive the rotor screw 14 to rotate and feed in the injection stator, and the transmission shaft 3 rotates to drive the centrifugal set 5 to rotate centrifugally, driving the movable arc cover 6 to slide linearly, and the transmission belt 403 drives the transmission plate 12 and the leak-proof plate 11 to slide, opening the glue outlet end of the conveying channel 103;

[0040] Specifically, in the present invention, the adjustment component for driving the leak-stopping plate 11 to move is connected to the rotary power member in the rotor component through the first transmission component 4. When the dispensing process is not performed, the rotary power member in the rotor component is in a shutdown state. The corresponding leak-stopping plate 11 is used to seal the glue outlet end of the conveying channel 103 to prevent the hot melt adhesive from leaking through the gap between the glue injection stator and the rotating screw, causing the hot melt adhesive to drip from the dispensing tube 102.

[0041] When the glue dispensing operation is performed, the rotary power component is turned on, and the rotary shaft 201 at one end of the rotary power component drives the rotor screw 14 to rotate, and cooperates with the glue channel on the inner wall of the glue injection stator to realize the transportation of the glue liquid. At the same time, the rotary power component synchronously drives the adjustment component to transmit during rotation, drives the leak-stop plate 11 to move and slide, and opens the glue outlet end of the delivery channel 103 to perform the glue dispensing operation.

[0042] like Figure 1 , Figure 2 as well as Figure 3 As shown, in the embodiment of the present invention, the rotary power part is a double-shaft synchronous motor 2, and the double-shaft synchronous motor 2 is different from the rotary shaft 201 connected to one end of the rotor assembly and is connected to the transmission shaft 3 through the first transmission assembly 4. In the present invention, the double-shaft synchronous motor 2 is turned on to drive the rotary shafts 201 at both ends to rotate synchronously, and the rotary shaft 201 at one end of the double-shaft synchronous motor 2 drives the rotor screw 14 to rotate to realize the delivery of the glue liquid, and the rotary shaft 201 at the other end drives the leakage-stopping plate 11 to move with the transmission belt 403 to realize the opening of the glue outlet end of the delivery channel 103;

[0043] Of course, in actual design, the dual-axis synchronous motor 2 may also be made of other components with rotational driving capabilities, such as a single-axis specification motor model for driving operations.

[0044] like Figure 1 and Figure 4As shown, in the embodiment of the present invention, the first transmission assembly 4 includes a transmission belt 403, a first transmission wheel 401 and a second transmission wheel 402;

[0045] The No. 1 transmission wheel 401 and the No. 2 transmission wheel 402 are correspondingly coaxially installed at the ends of the rotating shaft 201 and the transmission shaft 3. The No. 1 transmission wheel 401 and the No. 2 transmission wheel 402 are connected by a transmission belt 403. When the transmission shaft 3 is rotated, the rotating shaft 201 rotates to drive the No. 1 transmission wheel 401 thereon to rotate, and the transmission operation of the transmission belt 403 and the No. 2 transmission wheel 402 finally drives the transmission shaft 3 to rotate. In the present invention, the size specification of the No. 1 transmission wheel 401 is larger than the size specification of the No. 2 transmission wheel 402, so that during the transmission operation, the rotation speed of the No. 2 transmission wheel 402 and the transmission shaft 3 is greater than the rotation speed of the No. 1 transmission wheel 401 and the rotating shaft 201, thereby realizing the speed-up function, thereby meeting the rotation requirement of the transmission shaft 3 in the subsequent centrifugal kit 5.

[0046] like Figure 4 and Figure 5 As shown, in the embodiment of the present invention, the centrifugal kit 5 includes a guide bracket 501 and a plurality of sets of centrifugal sliders 502;

[0047] The guide bracket 501 is fixedly installed on the outside of the transmission shaft 3, and a plurality of guide grooves are evenly arranged on its circumferential side along the radial direction of the transmission shaft 3. A plurality of centrifugal sliders 502 are slidably installed in the corresponding guide grooves. An abutment ball 503 is fixedly installed at one end of the centrifugal slider 502 away from the transmission shaft 3. In the present invention, the guide bracket 501 is driven to rotate synchronously by the transmission shaft 3, so that the plurality of centrifugal sliders 502 installed on the guide bracket 501 slide centrifugally outward, and at the same time, the abutment ball 503 fixedly installed at the end of the centrifugal slider 502 presses the movable arc cover 6 to drive the movable arc cover 6 linearly;

[0048] At the same time, in the present invention, a connecting rod 504 is hinged at the upper end of the multiple groups of centrifugal sliders 502, and one end of the multiple groups of connecting rods 504 is hinged to a synchronous ring 505 slidably installed on the transmission rod. When the multiple groups of centrifugal sliders 502 rotate centrifugally, the multiple groups of connecting rods 504 drive the synchronous ring 505 to slide along the axial direction of the transmission shaft 3. Through the movement of the synchronous ring 505, the displacement stroke of the multiple groups of centrifugal sliders 502 during centrifugal rotation is unified, so that the movable arc cover 6 in contact with the multiple groups of abutting balls 503 is in a stable state, thereby improving the stability of the device.

[0049] like Figure 4 and Figure 5As shown, in the embodiment of the present invention, the movable arc cover 6 is slidably mounted on the fixed bracket 9 outside the flow channel module 1 through multiple sets of telescopic connecting rods 8, and the sliding direction is along the axial direction of the transmission shaft 3, and the bottom of the movable arc cover 6 is elastically connected to the fixed bracket 9 through a connecting spring 7, and the upper inner wall of the movable arc cover 6 abuts against the abutment ball 503 at the end of the centrifugal slider 502. The telescopic connecting rod 8 preferably used to connect the movable arc cover 6 and the fixed bracket 9 in the present invention is the prior art, which includes two sets of slidably connected movable rods, and the multiple sets of telescopic connecting rods 8 can guide the movable arc cover 6 when the movable arc cover 6 moves linearly. In the present invention, the movable arc cover 6 is elastically connected to the fixed bracket 9 by the connecting spring 7. When the transmission shaft 3 rotates, the centrifugal slider 502 is driven to slide outward, and the abutting ball 503 at its end presses the movable arc cover 6 to slide downward. At this time, the connecting spring 7 is in a compressed state and provides a supporting elastic force for the movable arc cover 6 to return to slide upward. When the transmission shaft 3 stops rotating, the connecting spring 7 supports the movable arc cover 6 to move upward, and the abutting ball 503 is squeezed by the inner wall of the movable arc cover 6, driving multiple groups of centrifugal sliders 502 to slide inward until they abut against the end limit of the guide groove;

[0050] And further, if Figure 6 As shown, in the embodiment of the present invention, the second transmission assembly 10 includes a ball screw 1001, a ball nut 1002, a transmission gear ring 1003 and a transmission rack 1004;

[0051] The ball screw 1001 is fixedly mounted on the bottom of the movable arc cover 6, the ball nut 1002 is rotatably mounted on the fixed bracket 9 on the outside of the flow channel module 1, and is spirally driven with the ball screw 1001, the transmission ring gear 1003 is coaxially mounted on the outside of the ball nut 1002, the transmission rack 1004 is fixedly mounted on the transmission bracket 13 connected to the outer end of the transmission plate 12, and is meshed with the transmission ring gear 1003. When the second transmission component 10 of the present invention realizes the transmission operation, the movable arc cover 6 is forced to move downward, driving the ball screw 1001 at the bottom thereof to move downward, and the ball screw 1001 and the ball nut 1 002 threaded transmission connection makes the ball nut 1002 rotate and drive the transmission gear ring 1003 coaxially installed on its outer side to rotate, and the meshing of the transmission rack 1004 drives the transmission bracket 13 and the transmission plate 12 to move, thereby driving the leak-proof plate 11 at the end of the conveying channel 103 to open. At the same time, the number of the leak-proof plates 11 is two groups, and the two groups of transmission brackets 13 are connected accordingly. The transmission racks 1004 on the two groups of transmission brackets 13 are respectively meshed and connected to the two sides of the transmission gear ring 1003. The two groups of leak-proof plates 11 can be driven by the displacement of the corresponding transmission brackets 13 in different states to achieve a mirror image to move away from or approach abutment;

[0052] In the present invention, since the displacement distance of the leak-stopping plate 11 corresponds to the downward displacement distance of the movable shield, and the downward displacement distance of the movable shield corresponds to the sliding stroke of the centrifugal slider 502, and the sliding stroke of the centrifugal slider 502 corresponds to the rotation speed of the transmission shaft 3, when the rotation speed of the dual-axis synchronous motor 2 is faster, the rotation speed of the rotor screw 14 located in the injection stator is accelerated, and the dispensing delivery speed of the flow channel module 1 and the rotor assembly is accelerated. At the same time, the sliding stroke of the centrifugal slider 502 is increased due to the accelerated speed of the rotating shaft 201. , which increases the downward movement distance of the movable shield and increases the displacement distance opening of the leak-stop plate 11 accordingly to meet the delivery efficiency of the glue dispensing liquid. On the contrary, when the rotation speed of the dual-axis synchronous motor 2 decreases, the glue dispensing delivery speed of the flow channel module 1 and the rotor assembly decreases, and the corresponding displacement distance opening of the leak-stop plate 11 decreases accordingly, thereby achieving the glue dispensing delivery efficiency of the glue dispensing tube 102 with different coarseness specifications, and adjusting the size of the corresponding delivery channel 103 opening to avoid uneven glue delivery speed, which may cause uneven distribution of the hot melt adhesive during coating or pouring.

[0053] In summary, the present invention is provided with a flow channel module 1, a rotor assembly, a leak-stop assembly and an adjustment assembly. When the present invention is in a shutdown state, the leak-stop plate 11 in the leak-stop assembly seals the glue outlet end, specifically during use;

[0054] 1. The leak-stopping plate 11 of the present invention can seal the glue outlet end of the conveying channel 103 when the glue dispensing process is not being performed, so as to prevent the hot melt glue from leaking through the gap between the glue injection stator and the rotating screw, causing the hot melt glue to drip. When the glue dispensing operation is being performed, the dual-axis power motor is turned on, and the transmission shaft 3, the centrifugal slider 502, the movable arc cover 6, the ball screw 1001, the ball nut 1002, the transmission gear ring 1003 and the transmission rack 1004 drive the leak-stopping plate 11 to slide and displace, and the glue outlet end of the conveying channel 103 is opened to perform the glue dispensing operation;

[0055] 2. The displacement distance of the leak-stop plate 11, the downward movement distance of the movable protective cover, and the outward sliding stroke of the centrifugal slider 502 correspond synchronously in sequence, so that when the rotation speed of the dual-axis synchronous motor 2 corresponds to the displacement distance of the leak-stop plate 11, the rotation speed of different rotor screws 14 matches the corresponding opening size of the conveying channel 103, thereby achieving the dispensing and conveying efficiency of dispensing tubes 102 with different coarseness specifications, and adjusting the size of the corresponding conveying channel 103 opening to avoid uneven glue delivery speed, which may cause uneven distribution of hot melt adhesive during coating or pouring.

[0056] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. A hot melt adhesive screw valve structure with a leak-proof function, characterized in that: include: A flow channel module (1) is provided with a glue inlet joint (101) and a glue dispensing tube (102) at both ends thereof, and a delivery channel (103) for the flow of glue is provided therein, a glue injection stator is installed in the delivery channel (103), and a glue dispensing tube (102) is detachably provided at the glue outlet end of the delivery channel (103); The rotor assembly comprises a rotor screw (14) and a rotary power piece, wherein the rotor screw (14) is rotatably mounted in the injection stator, and the rotary power piece is fixedly mounted on the outside of the flow channel module (1), and its rotary shaft (201) is fixedly connected to one end of the rotor screw (14); The leak-stopping assembly comprises a leak-stopping plate (11) and a transmission plate (12), wherein the leak-stopping plate (11) is slidably mounted on the glue outlet end of the conveying channel (103), and the leak-stopping plate (11) seals the glue outlet end; the transmission plate (12) is slidably mounted in a guide groove provided on the flow channel module (1), one end of the transmission plate (12) is fixedly connected to the leak-stopping plate (11), and the other end extends out of the flow channel module (1); The regulating assembly comprises a transmission shaft (3), a centrifugal assembly (5) and a movable arc cover (6), wherein the transmission shaft (3) is rotatably mounted on the outside of the flow channel module (1) and is transmission-connected to the rotary shaft (201) of the rotary power member via a first transmission assembly (4), the centrifugal assembly (5) is mounted on the outside of the transmission shaft (3), and the movable arc cover (6) is elastically mounted on the outside of the flow channel module (1) and is transmission-connected to the transmission plate (12) via a second transmission assembly (10); The rotary power part rotates to drive the rotor screw (14) to rotate in the injection stator to feed the material, and the transmission shaft (3) rotates to drive the centrifugal set (5) to rotate centrifugally, drive the movable arc cover (6) to slide linearly, and drive the transmission belt (403) to drive the transmission plate (12) and the leak-proof plate (11) to slide, thereby opening the glue outlet end of the conveying channel (103).

2. A hot melt adhesive screw valve structure with a leak-proof function according to claim 1, characterized in that: The rotary power component is a dual-axis synchronous motor (2), and the dual-axis synchronous motor (2) is connected to a rotary shaft (201) at one end of the rotor assembly and is transmission-connected to the transmission shaft (3) via a first transmission assembly (4).

3. A hot melt adhesive screw valve structure with a leak-proof function according to claim 2, characterized in that: The first transmission assembly (4) comprises a transmission belt (403), a first transmission wheel (401) and a second transmission wheel (402); The first transmission wheel (401) and the second transmission wheel (402) are coaxially mounted on the ends of the rotating shaft (201) and the transmission shaft (3), and the first transmission wheel (401) and the second transmission wheel (402) are connected in transmission via a transmission belt (403).

4. A hot melt adhesive screw valve structure with a leak-proof function according to claim 1, characterized in that: The centrifugal kit (5) comprises a guide bracket (501) and a plurality of sets of centrifugal sliding blocks (502); The guide bracket (501) is fixedly mounted on the outside of the transmission shaft (3), and a plurality of guide grooves are evenly arranged on the peripheral side thereof along the radial direction of the transmission shaft (3). A plurality of centrifugal sliders (502) are slidably mounted in the corresponding guide grooves, and an abutment ball (503) is fixedly mounted on one end of the centrifugal slider (502) away from the transmission shaft (3).

5. A hot melt adhesive screw valve structure with a leak-proof function according to claim 4, characterized in that: The upper ends of the plurality of groups of centrifugal sliding blocks (502) are hinged with connecting rods (504), and one end of the plurality of groups of connecting rods (504) is hinged with a synchronous ring (505) slidably mounted on a transmission rod.

6. A hot melt adhesive screw valve structure with leak-proof function according to claim 5, characterized in that: The movable arc cover (6) is slidably mounted on a fixed bracket (9) outside the flow channel module (1) via a plurality of sets of telescopic connecting rods (8), and the sliding direction is along the axial direction of the transmission shaft (3). The bottom of the movable arc cover (6) is elastically connected to the fixed bracket (9) via a connecting spring (7), and the upper inner wall of the movable arc cover (6) is in contact with the contact ball (503) at the end of the centrifugal slider (502).

7. A hot melt adhesive screw valve structure with a leak-proof function according to claim 1, characterized in that: The second transmission assembly (10) comprises a ball screw (1001), a ball nut (1002), a transmission gear ring (1003) and a transmission rack (1004); The ball screw (1001) is fixedly mounted on the bottom of the movable arc cover (6); the ball nut (1002) is rotatably mounted on a fixed bracket (9) on the outside of the flow channel module (1) and is spirally driven with the ball screw (1001); the transmission gear ring (1003) is coaxially mounted on the outside of the ball nut (1002); the transmission rack (1004) is fixedly mounted on a transmission bracket (13) connected to the outer end of the transmission plate (12) and is meshedly connected with the transmission gear ring (1003).

8. A hot melt adhesive screw valve structure with a leak-proof function according to claim 1, characterized in that: The leak-proof plates (11) are provided in two groups, and are correspondingly connected to two groups of transmission brackets (13). The transmission racks (1004) on the two groups of transmission brackets (13) are respectively meshed and connected to the two sides of the transmission gear ring (1003).

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