BE1030164B1 - Sealant gun for applying polyurethane foam joint compound - Google Patents

Abstract

The present utility model discloses a sealant gun for applying polyurethane foam joint compound. It comprises a gun body, the gun body being provided with a sealant injection cavity and a drying aid cavity, which are arranged next to one another and are not connected to one another, with a polyurethane foam grout conveying mechanism and a drying aid conveying mechanism being provided at the front end of the gun body, with an outlet end of the polyurethane foam grout conveying mechanism and an outlet end of the drying aid conveying mechanism are connected together to a mixer, the upper end of the gun body being provided with a sealant injection mechanism and a drying aid adding mechanism offset from each other in the front-rear direction , wherein the rear end of the gun body is provided with a polyurethane foam grout flow control mechanism, while a drying aid flow control mechanism is provided on the gun body. In the present utility model, the flow rate of a liquid sealant is controlled via the polyurethane foam grout flow control mechanism and the flow speed of a drying aid is controlled via the drying aid flow control mechanism. After efficient mixing at the mixer, the polyurethane foam joint compound and the drying aid are sprayed out, thereby improving the drying effect of the polyurethane foam joint compound.

Description

Sealant gun for applying polyurethane foam joint compound

TECHNICAL FIELD

The present utility model relates to the technical field of sealant guns, specifically a sealant gun for applying polyurethane foam joint compound.

STATE OF THE ART

In China, single-component polyurethane foam joint compounds are currently used. A one-component polyurethane foam joint compound is a moisture-curing, multi-purpose elastic foam-fill sealing material made from polyurethane. At the

An aerosol is applied using an associated sealant gun or a manual one

Sprayer sprayed on a desired area, which means that molding takes place in a short time,

Foaming, gluing and sealing can be completed. Your cured foam elastomer is advantageously characterized by adhesive properties, water resistance, resistance to thermal expansion and contraction, thermal insulation properties, sound insulation properties and even fire resistance and is therefore widely used.

With existing sealant guns available on the market for applying

Polyurethane foam grout is usually just one

Sealant injection mechanism is provided that can only inject a polyurethane foam grout. The long drying time required for the polyurethane foam grout causes a long waiting time. To improve the drying effect of the polyurethane foam joint compound, the polyurethane foam joint compound can be used at the

Use mixed with a drying aid. However, most polyurethane foam grout sealant guns currently on the market do not have one

Mixer is provided and therefore it is not possible to mix and spray out the polyurethane foam joint compound and a drying aid. Furthermore, most sealant guns currently available on the market are for em-component

Polyurethane foam joint compound not possible to filter the drying aid. If that

Drying aid that goes into a one-component sealant gun

Polyurethane foam grout is injected contains excessive contaminants, the quality of the injected polyurethane foam grout will then be compromised.

DISCLOSURE OF USAGE PATTERN

The present utility model is based on the task of creating a sealant gun

To provide polyurethane foam grout application, thus solving the problem with the sealant guns currently available on the market for applying

Polyurethane foam joint compound is not possible to mix and spray a polyurethane foam joint compound and a drying aid, with which the

Polyurethane foam joint compound and the drying aid are mixed and sprayed out and thus the drying effect of the polyurethane foam joint compound is improved, the drying aid being filtered before mixing the polyurethane foam joint compound and the drying aid.

According to the present utility model, the task is solved by the following

Design:

A sealant gun for applying polyurethane foam grout includes a

Gun body, the gun body having a sealant injection cavity and a

Drying aid cavity, which are arranged vertically next to each other and are not connected to each other, is provided, with a at the front end of the gun body

Polyurethane foam grout delivery mechanism that works with the

Sealant injection cavity is connected, and a drying aid conveying mechanism connected to the drying aid cavity are provided, wherein the

Polyurethane foam grout delivery mechanism and the

Drying aid conveying mechanism are arranged vertically next to each other, with a

Outlet end of the polyurethane foam grout delivery mechanism and an outlet end of the drying aid delivery mechanism are connected together to a mixer, the upper end of the gun body being connected to a sealant injection cavity and used to add a polyurethane foam grout

Sealant injection mechanism and one connected to the drying aid cavity and used to add a drying aid

Drying aid addition mechanism, which are offset from each other in the front-rear direction, is provided, the rear end of the gun body being provided with a

Polyurethane foam grout flow control mechanism is provided, which is used to regulate the

The outlet speed of the sealant injection mechanism is used while on the

Gun body is provided with a drying aid flow control mechanism, which is used for

Regulating the outlet speed of the drying aid addition mechanism is used.

In a further development it is provided that the drying aid addition mechanism has a feed cylinder body arranged on the gun body, in which the

Drying aid cavity is arranged, a second cylindrical cylinder body, which is provided on the feed cylinder body, connected obliquely thereto and above the

Drying aid cavity is arranged, a second cartridge mounting holder which is fixed relative to the second cylindrical cylinder body, and a

Drying aid addition cartridge positioned on the second cartridge mounting holder.

In further training it is planned that the

Drying aid discharge control mechanism a cone-shaped connecting tube threadedly mounted on the front end of the supply cylinder body, a valve plate disposed in the cone-shaped connecting tube, and a

Valve plate adjustment mechanism that allows the valve plate to move in the cone-shaped

Connecting pipe drives in order to regulate the outlet state of the drying aid, wherein the inner diameter of the conical connecting pipe increases from front to back, and wherein between the valve plate and the inner wall of the conical

An outlet opening is formed in the connecting pipe.

In a further development it is provided that the valve plate adjustment mechanism comprises a movable rod which is in the conical connecting tube and the

Drying aid cavity is introduced, with the valve plate firmly attached to the movable

Rod is arranged, with one on the outer circumference of the movable rod

Spring is pushed on, which is fixed at one end relative to the valve plate and at the other

End is fixedly arranged on the inner wall of the feed cylinder body, with one end of the movable rod protruding movably from the feed cylinder body and is connected in one piece to a threaded rod, with the outer end of the threaded rod having a

Threaded a drive assembly that drives the threaded rod to move is mounted.

In a further development it is provided that the rear end surface of the feed cylinder body is arranged inclined and is provided with a recess at a higher inclined point, the drive assembly being an L-shaped handle which has a

Thread is mounted on the outer end of the threaded rod; wherein the L-shaped handle, when not discharging by the feed cylinder body, is rotated to a lower inclined position of the inclined end surface, thereby closing the discharge opening, while when discharging by the feed cylinder body, the L-shaped handle is rotated in the

Recess is located, which opens the outlet opening.

In further training it is planned that the

Polyurethane foam grout delivery mechanism a

Polyurethane foam grout delivery pipeline connected to the sealant injection cavity, and a first spray nozzle located at an end portion of the

Polyurethane foam joint compound delivery pipeline is arranged, includes.

In a further development it is provided that the drying aid conveying mechanism is a

Filter cotton tube connected to the drying aid cavity and a second

Spray nozzle, which is arranged at an end section of the filter cotton tube, wherein a filter cotton is provided in the filter cotton tube, which removes impurities from the

Can filter out drying aids.

In further training it is planned that the

Polyurethane foam grout flow control mechanism a trigger lever that is attached to the

Pistol body is articulated and inclined, and includes a trigger rod, the

Trigger rod is movably inserted into the sealant injection cavity, one end of which

The trigger rod passes through the trigger lever and with a push rod that is attached to it

Trigger lever rests, is connected, with the push rod resting on a reset assembly which is arranged in the gun body.

In a further development it is provided that the drive assembly is U-shaped

Mounting frame includes, on the middle crossbar of which the threaded rod is attached

Thread is mounted, an adjusting nut being rotatably arranged on the fastening frame, which is mounted via a thread on the threaded rod and for adjusting the

size of the outlet opening of the feed cylinder body; where two ends of the

Fastening frame are articulated on two side end surfaces of the uppermost area of the trigger lever.

In a further development it is provided that at the rear end of the gun body there is a

Thread an adjustment knob, which is used to adjust the path of the push rod, is mounted, the adjustment knob being arranged coaxially with the trigger rod.

Thanks to the use of the above-mentioned embodiment, the present one

Utility model achieved the following technical advances:

In the present utility model, a sealant injection mechanism is used

Polyurethane foam joint compound is injected into the sealant injection cavity and over the

Drying aid addition mechanism adds a drying aid to the

Drying aid cavity injected. The exit speed of a

Liquid sealant is controlled via the polyurethane foam grout flow control mechanism and the flow rate of the drying aid is controlled via the

Drying aid flow control mechanism regulated. After an efficient

Mixing at the mixer with which the outlet end of the

Polyurethane foam grout delivery mechanism and the outlet end of the

Drying aid conveying mechanism are connected together, the

Polyurethane foam joint compound and the drying aid are sprayed out, with which the

Drying effect of the polyurethane foam joint compound is improved.

In the present utility model, by providing the filter cotton tube and by providing the filter cotton in the filter cotton tube, the filtering of the drying aid is achieved before mixing the drying aid and the polyurethane foam joint compound, whereby impurities are effectively filtered out of the drying aid and thus the quality of the sprayed polyurethane foam Joint compound is improved.

In the present utility model, the position of the valve plate can be adjusted.

By turning the L-shaped handle, the threaded rod is used to move in the

Transverse direction driven or by operating the trigger lever is over the U-shaped

Fastening frame pulls the threaded rod so that it moves in the transverse direction, causing the valve plate to move in the conical connecting pipe. Different positions of the valve plate lead to correspondingly different ones

Gaps between the valve plate and the inner wall of the cone-shaped

Connecting pipe, whereby the outlet state of the drying aid can be adjusted in a simple manner.

BRIEF DESCRIPTION OF THE DRAWINGS

Show it:

Fig. 1 is a schematic structural view of the present utility model;

Fig. 2 is a schematic structural partial representation of the present utility model;

Fig. 3 is a partial sectional view of the present utility model;

Fig. 4 is a sectional view of the present utility model;

Fig. 5 is a partial sectional view of the present utility model from another

viewing angle;

Fig. 6 is a schematic structural view of a mixer of the present utility model;

Fig. 7 is a front view of the mixer of the present utility model;

Fig. 8 is a side view of the mixer of the present utility model.

N BE2022/6056

DETAILED DESCRIPTION

The following will be more specific with reference to the accompanying drawings

Examples of embodiments of the present utility model are discussed in more detail.

First embodiment

As shown in Figs. 1 to 8, a sealant gun for applying includes

Polyurethane foam joint compound a gun body 1, a sealant injection cavity, a drying aid cavity, a

Polyurethane foam grout delivery mechanism, one

Drying aid conveying mechanism 8, a mixer 6, a

Sealant injection mechanism 4, a drying aid addition mechanism 5, one

Polyurethane foam grout flow control mechanism 3 and one

Drying aid flow control mechanism 9.

The gun body 1 is with the sealant injection cavity and the

Drying aid cavity, which are arranged vertically next to each other and are not connected to each other.

The upper end of the gun body 1 is connected to the sealant injection mechanism 4 and the

Drying aid adding mechanism 5, which are offset from each other in the front-rear direction, is provided. The sealant injection mechanism 4 is with the

Sealant injection cavity connected and is used to add a

Polyurethane foam joint compound. The drying aid addition mechanism 5 is connected to the drying aid cavity and serves to add a

drying aid.

The sealant injection mechanism 4 includes a first cylindrical cylinder body 41 disposed above and obliquely connected to the sealant injection cavity, a first cartridge mounting holder 42 positioned relative to the first cylindrical

Cylinder body 41 is fixed, and a polyurethane foam grout addition cartridge positioned on the first cartridge mounting holder 42.

At the front end of the gun body 1 are the

Polyurethane foam grout delivery mechanism that works with the

Sealant injection cavity is connected, and the drying aid conveying mechanism 8, which is connected to the drying aid cavity, is provided. The

Polyurethane foam grout delivery mechanism and the

Drying aid conveyor mechanism 8 are arranged vertically next to each other.

The polyurethane foam grout delivery mechanism includes a

Polyurethane foam grout delivery pipeline 7 and a first spray nozzle 71. The

Polyurethane foam grout delivery pipeline 7 is connected to the sealant injection cavity. The first spray nozzle 71 is at an end portion

Polyurethane foam joint compound delivery pipeline 7 arranged.

The drying aid conveying mechanism 8 includes a filter cotton tube 83, which is connected to the

Drying aid cavity is connected, and a second spray nozzle 85, which is connected to a

End section of the filter cotton tube 83 is arranged. The filter cotton tube 83 and a conical connecting tube 93 are detachably connected to one another via a connecting assembly 84. A filter cotton 82 is provided in the filter cotton tube 83, which can filter out impurities from the drying aid.

In the present utility model, the first spray nozzle 71 and the second spray nozzle 85 are designed the same or differently.

An outlet end of the polyurethane foam grout delivery mechanism and a

Outflow ends of the drying aid conveying mechanism 8 are shared with the

Mixer 6 connected. As can be seen from FIGS. 6 to 8, the mixer 6 includes

Main mixing tube 61, an auxiliary mixing tube 62 and a connecting tube 63.

The main mixing tube 61 is detachably connected to the first spray nozzle 71 at the end of the

Polyurethane foam grout delivery pipeline 7 connected. An incoming end of the

Main mixing tube 61 is provided with a first positioning section 65 in which a first

Insertion hole is provided, the first insertion hole and the

Polyurethane foam joint compound delivery pipeline are mounted close to each other.

The auxiliary mixing tube 62 is detachably connected to the second spray nozzle 85 at the end of the

Drying aid conveyor mechanism connected. An incoming end of the

Auxiliary mixing tube 62 is provided with a second positioning section 66 in which a second

Insertion hole is provided, the second insertion hole and the conical one

Connecting pipes are mounted close to each other.

An outlet end of the auxiliary mixing tube 62 is connected to the middle one via the connecting tube 63

Area of the main mixing tube 61 connected. The auxiliary mixing tube 62 conveys

Drying aids for mixing into the main mixing tube 61.

The main mixing tube 61 has a total length of 104.2 mm, with the outlet end of the

Main mixing tube 61 has a length of 60.78 mm. The outlet end of the main mixing tube 61 is located at the rear end of the connection point between the connecting tube 63 and the main mixing tube 61. The outlet end of the main mixing tube 61 is designed as a conical tube, so that the main mixing tube 61 tapers in diameter at an outlet opening and thus the spray quantity of the mixed liquid sealant in the main mixing tube

61 is reduced. Furthermore, the outlet end of the main mixing tube 61 has a certain length, which increases the mixing time of the polyurethane foam joint compound and the

Drying aid is extended.

Between the outer wall of the main mixing tube 61 and the outer wall of the auxiliary mixing tube 62, an angled reinforcing plate 64 is connected, which serves to reinforce the connection, thereby increasing the connection strength between the main mixing tube 61 and the

Auxiliary mixing tube 62 is increased.

The main mixing tube 61, the auxiliary mixing tube 62 and the connecting tube 63 are each made of a PP material.

The central axis of the main mixing tube 61 runs parallel to the central axis of the

Auxiliary mixing tube 62.

The rear end of the gun body 1 is with a

Polyurethane foam grout flow control mechanism 3, which is used to regulate the

Outlet speed of the sealant injection mechanism 4 is used.

The polyurethane foam grout flow control mechanism 3 includes a trigger lever 31 hinged and inclined on the gun body 1, and a trigger rod 32. The trigger rod 32 is movably inserted into the sealant injection cavity. That is, between the trigger rod, the sealant injection cavity and the

There is a gap in the polyurethane foam grout delivery pipeline 7. A

The end of the trigger rod passes through the trigger lever 31 and is connected to a push rod 33 which rests on the trigger lever 31. The push rod 33 is on one

Reset assembly, which is arranged in the gun body 1.

The push rod 33 includes a first cylindrical rod 331 and a second cylindrical one

Rod 332, which are connected in one piece and can move in a cavity. The outside diameter of the second cylindrical rod 332 is smaller than that

Outside diameter of the first cylindrical rod 331.

The restoring assembly includes a restoring spring 34 which is pushed onto the outer circumference of the second cylindrical rod 332. One end of the return spring abuts an end surface of the first cylindrical rod 331 and the other end is hollow

Connecting cylinder arranged.

At the rear end of the pistol body 1 there is a threaded adjustment knob 35, which is used to

Adjusting the path of the push rod 33 is mounted. The adjustment knob is arranged coaxially with the trigger rod.

The lower end of the gun body 1 is provided with a pistol grip 2, which means that

Gripping with one hand is made easier.

A drying aid outlet control mechanism 9 is also provided on the gun body 1, which is used to regulate the outlet speed of the

Drying aid addition mechanism 5 is used.

The drying aid adding mechanism 5 includes a supply cylinder body 54, a second cylindrical cylinder body 51, a second cartridge fixing holder 52, and a drying aid adding cartridge. The feed cylinder body 54 is on the

Gun body 1 arranged and the drying aid cavity is in the

Feed cylinder body 54 arranged. On the feed cylinder body 54, the second cylindrical cylinder body 51 is provided, which is connected obliquely to it and above the

Drying aid cavity is arranged. The second cartridge mounting holder 52 is relative to the second cylindrical cylinder body 51. The

Drying aid addition cartridge is positioned on the second cartridge mounting holder 52.

The drying aid dispensing control mechanism 9 includes the conical one

connecting pipe 93, a valve plate 91 and a valve plate adjusting mechanism 92. The conical connecting pipe 93 is threaded at the front end of the

Feed cylinder body 54 mounted. The inner diameter of the cone-shaped

Connecting pipe 93 increases from front to back. Between the valve plate 91 and the

An outlet opening is formed on the inner wall of the conical connecting tube 93.

The valve plate 91 is arranged vertically in the conical connecting pipe 93. Before the

Valve plate 91 is further provided with a horizontal projection plate 94.

The valve plate adjusting mechanism 92 serves to drive the valve plate 91 to move in the conical connecting pipe 93, thereby adjusting the leakage state of the valve plate 91

Drying aid to regulate. The valve plate adjusting mechanism 92 includes a movable rod 921, a spring 922, a threaded rod 923, a mounting frame 927 and an adjusting nut 926. The movable rod 921 is in the conical shape

Connecting pipe 93 and the drying aid cavity are introduced. The valve plate 91 is fixedly arranged on the movable rod 921. On the outer circumference of the movable

Rod 921 also has the spring 922 pushed on, which is at one end relative to the

Valve plate 91 is fixed and fixedly arranged at the other end on the inner wall of the supply cylinder body 54. One end of the movable rod 921 protrudes movably from the

Feed cylinder body 54 out and is connected in one piece to the threaded rod 923. At the outer end of the threaded rod 923 there is a threaded drive assembly that...

Threaded rod 923 drives for movement, mounted.

The drive assembly includes a U-shaped mounting frame 927, at its middle

Cross brace the threaded rod 923 is mounted via a thread. An adjusting nut 926 is rotatably arranged on the fastening frame 927 and is mounted on the threaded rod 923 via a thread. The adjusting nut 926 is used to turn the threaded rod 923

to drive rotation. This means that by clamping it with a wrench you can

Adjusting nut 926 can be turned. Since the adjusting nut 926 can be rotated via a bearing

Fastening frame 927 is arranged, the adjusting nut 926 can only be used

Rotate in the circumferential direction. When turning the adjusting nut 926 in

In the circumferential direction, the threaded rod 923 is set in motion in the transverse direction, which sets the valve plate 91 in motion and thus the size of the outlet opening of the

Feed cylinder body 54 is adjusted. Two ends of the fastening frame 927 are articulated on two side end surfaces of the uppermost region of the trigger lever 31, so that when

Activating the trigger lever with one hand results in the discharge

Polyurethane foam joint compound and the drying aid can be regulated at the same time.

The conical connecting tube 93 is connected in one piece or detachably to the gun body 1. The supply cylinder body 54 in the drying aid addition mechanism 5 is integrally or detachably connected to and arranged on the gun body 1.

When the present utility model is used in practice, the maximum

Dispensing speed of the polyurethane foam joint compound by turning the

Adjustment knob 35 depending on the environmental requirements for the injection of

Sealant can be adjusted. A polyurethane foam grout cartridge is attached to the

Sealant injection mechanism 4 is mounted and a drying aid cartridge is mounted on the drying aid addition mechanism 5.

The position of the valve plate 91 is then adjusted. By means of one

Using the wrench, the adjusting nut 926 is turned, which holds the threaded rod 923 in

Movement is offset in the transverse direction, whereby the valve plate 91 is set in motion in the conical connecting tube 93. Different positions of the valve plate 91 lead to correspondingly different gaps between the valve plate 91 and the inner wall of the conical connecting tube 93, which means that the

Outlet speed of the drying aid is achieved.

An outlet opening of the mixer 6 is aligned with an application point and the

Trigger lever 31 is pressed so that the trigger lever 31 touches the push rod 33 and the

Trigger rod 32 is set in motion. When moving the trigger lever 31, the

Fastening frame 927, the threaded rod 923, the movable rod 921 and the

Valve plate 91 can be set in motion, resulting in a

Drying aid outlet opening is opened. After moving the trigger bar, the space at the outlet opening of the polyurethane foam grout delivery pipe 7 is increased and the polyurethane foam grout flows directly into the additional space.

When the trigger lever 31 is reset, the polyurethane foam joint compound is then forced out through the trigger rod into the main mixing tube 61. The drying aid enters via the space between the drying aid cavity, the valve plate and the conical connecting tube 93 and via the conical connecting tube

Auxiliary mixing tube. By repeatedly pressing the trigger lever 31 with one hand, the polyurethane foam joint compound and the drying aid are added to the mixer

Mixed and sprayed to a target position.

Second embodiment

The present exemplary embodiment is based on the first exemplary embodiment. In the present exemplary embodiment, the drying aid is not conveyed via the

Trigger lever 31 is controlled and is omitted in the present exemplary embodiment

Fastening frame 927 and the adjusting nut 926 in the first embodiment. In the present embodiment, the rear end surface of the supply cylinder body 54 is inclined and is provided with a recess 55 at a higher inclined position.

The drive assembly is an L-shaped handle that is threadedly mounted on the outer end of the threaded rod 923. If no cancellation by the

Feed cylinder body 54, the L-shaped handle is rotated to a deeper inclined point on the inclined end surface, thereby closing the outlet opening while the

L-shaped handle when discharge occurs through the feed cylinder body 54, in which

Recess 55 is located, which opens the outlet opening. By turning the

The L-shaped handle controls the position of the valve plate, allowing the discharge of the

Drying aid is controlled in a simple manner.

List of reference symbols 1 Gun body 2 Gun handle 3 Polyurethane foam grout flow control mechanism 31 Trigger lever 32 Trigger rod 33 Push rod

331 first cylindrical rod 332 second cylindrical rod 34 return spring 35 adjustment knob 4 sealant injection mechanism

41 first cylindrical cylinder body 42 first cartridge mounting holder 5 drying aid addition mechanism 51 second cylindrical cylinder body

52 second cartridge mounting holder 54 feed cylinder body 55 recess 6 mixer 61 main mixing tube

62 auxiliary mixing tube 63 connecting tube 64 angled reinforcement plate 65 first positioning section 66 second positioning section

7 polyurethane foam grout delivery pipeline 71 first spray nozzle 8 drying aid delivery mechanism 82 filter cotton 83 filter cotton tube

84 connection assembly 85 second spray nozzle 9 drying aid flow control mechanism 91 valve plate

92 valve plate adjustment mechanism 921 movable rod 922 spring 923 threaded rod 926 adjusting nut 927 fastening frame 93 conical connecting tube 94 horizontal projection plate

Claims (10)

Expectations 1. Sealant gun for applying polyurethane foam joint compound, comprising a gun body (1), characterized in that the gun body (1) is provided with a sealant injection cavity and a drying aid cavity, which are arranged next to one another and are not connected to one another, at the front end of the Gun body (1), a polyurethane foam grout delivery mechanism connected to the sealant injection cavity and a drying aid delivery mechanism (8) connected to the drying aid cavity are provided, the polyurethane foam grout delivery mechanism and the drying aid delivery mechanism ( 8) are arranged next to each other, with an outlet end of the polyurethane foam joint compound conveying mechanism and an outlet end of the drying aid conveying mechanism (8) being connected together to a mixer (6), the upper end of the gun body (1) being connected to a sealant injection cavity and a sealant injection mechanism (4) for adding a polyurethane foam joint compound and a drying aid addition mechanism (5) connected to the drying aid cavity and for adding a drying aid, which are arranged offset from one another in the front-rear direction, the rear The end of the gun body (1) is provided with a polyurethane foam joint compound dispensing control mechanism (3), which serves to regulate the dispensing speed of the sealant injection mechanism (4), while on the gun body (1) a drying aid dispensing control mechanism (9) is provided, which is used for Regulating the outlet speed of the drying aid addition mechanism (5) is used. 2. Sealant gun for applying polyurethane foam joint compound according to claim 1, characterized in that the drying aid addition mechanism (5) has a feed cylinder body (54) arranged on the gun body (1), in which the drying aid cavity is arranged, a second cylindrical cylinder body ( 51) provided on the supply cylinder body (54), obliquely connected thereto and disposed above the drying aid cavity, a second cartridge fixing holder (52) fixed relative to the second cylindrical cylinder body (51), and a drying aid addition cartridge attached the second cartridge mounting holder (52) is positioned. 3. Sealant gun for applying polyurethane foam joint compound according to claim 2, characterized in that the drying aid flow control mechanism (9) has a conical connecting tube (93) which has a thread at the front end of the Feed cylinder body (54), a valve plate (91) disposed in the tapered connecting tube (93), and a valve plate adjusting mechanism (92) driving the valve plate (91) to move in the tapered connecting tube (93), thereby to regulate the outlet state of the drying aid, wherein the inner diameter of the conical connecting tube (93) increases from front to back, and an outlet opening is formed between the valve plate (91) and the inner wall of the cone-shaped connecting tube (93). 4. Sealant gun for applying polyurethane foam joint compound according to claim 3, characterized in that the valve plate adjustment mechanism (92) comprises a movable rod (921) which is inserted into the conical connecting tube (93) and the drying aid cavity, the valve plate (91) is fixedly arranged on the movable rod (921), a spring (922) also being pushed onto the outer circumference of the movable rod (921), which is fixed at one end relative to the valve plate (91) and at the other end firmly to the inner wall of the feed cylinder body (54), one end of the movable rod (921) protruding movably from the feed cylinder body (54) and being connected in one piece to a threaded rod (923), with one at the outer end of the threaded rod (923) via a thread Drive assembly that drives the threaded rod (923) to move is mounted. 5. Sealant gun for applying polyurethane foam joint compound according to claim 4, characterized in that the rear end surface of the feed cylinder body (54) is arranged inclined and is provided with a recess (55) at a higher inclined point, the drive assembly being a L-shaped handle, which is threadedly mounted on the outer end of the threaded rod (923); wherein the L-shaped handle, when there is no discharge by the feed cylinder body (54), is rotated to a lower inclined point of the inclined end surface, thereby closing the discharge opening, while when there is a discharge by the feed cylinder body, the L-shaped handle is rotated (54) is located in the recess (55), which opens the outlet opening. 6. Sealant gun for applying polyurethane foam grout according to claim 4, characterized in that the polyurethane foam grout delivery mechanism includes a polyurethane foam grout delivery pipe (7) connected to the sealant injection cavity and a first spray nozzle (71) connected to an end section of the polyurethane foam joint compound delivery pipeline (7) is arranged. 7. Sealant gun for applying polyurethane foam joint compound according to claim 6, characterized in that the drying aid conveying mechanism (8). Filter cotton tube (83), which is connected to the drying aid cavity, and a second spray nozzle (85), which is arranged at an end section of the filter cotton tube (83), wherein a filter cotton tube (82) is provided in the filter cotton tube (83), which Can filter out impurities from the drying aid. 8. Sealant gun for applying polyurethane foam joint compound according to claim 7, characterized in that the polyurethane foam joint compound flow control mechanism (3) has a trigger lever (31), which is articulated and inclined on the gun body (1), and a trigger rod (32 ), wherein the trigger rod (32) is movably inserted into the sealant injection cavity, one end of the trigger rod (32) passing through the trigger lever (31) and being connected to a push rod (33) which rests on the trigger lever (31). , wherein the push rod (33) rests on a reset assembly which is arranged in the gun body (1). 9. Sealant gun for applying polyurethane foam joint compound according to claim 8, characterized in that the drive assembly comprises a U-shaped fastening frame (927), on the middle cross strut of which the threaded rod (923) is mounted via a thread, on the fastening frame (927 ) an adjusting nut (926) is rotatably mounted, which is threadably mounted on the threaded rod (923) and serves to adjust the size of the outlet opening of the feed cylinder body (54); wherein two ends of the fastening frame (927) are articulated on two side end surfaces of the uppermost region of the trigger lever (31). 10. Sealant gun for applying polyurethane foam joint compound according to claim 8, characterized in that an adjustment knob (35), which serves to adjust the path of the push rod (33), is mounted at the rear end of the gun body (1) via a thread, whereby the adjustment knob is arranged coaxially with the trigger rod.