CN113798081A

CN113798081A - Foaming gun foaming tank mounting adapter

Info

Publication number: CN113798081A
Application number: CN202111172019.0A
Authority: CN
Inventors: 梁海军
Original assignee: Zhejiang Chaoyu Tools Co ltd
Current assignee: Zhejiang Chaoyu Tools Co ltd
Priority date: 2021-10-08
Filing date: 2021-10-08
Publication date: 2021-12-17
Anticipated expiration: 2041-10-08
Also published as: CN113798081B; WO2023056693A1

Abstract

The invention discloses a foaming gun foaming tank mounting adapter which comprises a mounting frame movably connected to a gun body through a valve core, wherein the mounting frame is connected with a foaming tank. The valve mouth is sleeved on the valve core, and the upper end of the valve mouth is matched with the nozzle on the foaming tank. An actuating structure is arranged between the mounting frame and the valve core, and the mounting frame realizes the axial movement of the valve nozzle on the valve core through the actuating structure. A liquid flow channel is formed in the valve core and the valve nozzle, a plugging structure is arranged in the liquid flow channel and is positioned between the valve nozzle and the valve core, and the valve nozzle moving axially enables the plugging structure to be closed to plug or open the liquid flow channel to achieve communication of the liquid flow channel. The mounting bracket realizes the movement of the valve nozzle through the actuating structure, and can be manually controlled. Especially when the foaming tank is dismounted, the blocking structure can be in a closed state, the liquid flow channel is blocked, the foaming liquid in the gun tube is prevented from flowing back to the outer side, and the use cleanness of the foaming gun is ensured.

Description

Foaming gun foaming tank mounting adapter

Technical Field

The invention relates to a foaming gun, in particular to an adapter for mounting a foaming tank on the foaming gun.

Background

Foaming agents are frequently used in building decoration, the foaming agents are mainly used for coating gaps between plates or other structures, and the foaming agents accumulated in the gaps can be blocked at the gaps after being expanded and cured so as to realize the sealing of the gaps. The foaming agent is generally applied by means of a foaming gun. The structure of the foaming gun mainly comprises a gun body and a gun barrel, wherein a needle rod is arranged in the gun barrel, a liquid through cavity is arranged in the gun body, an adapter is used for being connected with a foaming tank, and a channel leading to the liquid through cavity is arranged in the adapter; the gun body is provided with a trigger, the trigger is connected with the needle rod, when the trigger is pulled, the needle rod can act along with the trigger, after the needle rod moves towards the rear side direction of the gun body under the driving of the trigger, a gap can be formed between the front end of the needle rod and a gun nozzle arranged at the front end part of the gun barrel, foaming agent can flow out of the gap to the outer side of the gun barrel, and the size of the gap is related to the flow of the foaming agent.

Chinese patent document (publication No. CN 201711246U) discloses a foaming gun adapter, which comprises an adapter body, a sealing ball and a conical spring, wherein the adapter body is provided with an inner cavity, a copper insert is screwed into the inner cavity, a bushing is arranged in the copper insert, the upper end surface of the copper insert abuts against the top end surface of the inner cavity, the copper insert is provided with a liquid inlet hole and a flow channel, the sealing ball is arranged in the copper insert, a sealing gasket is arranged between the sealing ball and the inner end surface of the copper insert, one end of the conical spring pushes against the lower end of the sealing ball, the other end of the conical spring pushes against a pressing sleeve fixed on the copper insert, the pressing sleeve is internally provided with a hollow flow channel, the upper end of the pressing sleeve is provided with protruding conical gluten striding over the sealing ball, a fan-shaped opening is arranged between the conical gluten, the pressing sleeve flow channel is communicated with the flow channel of the copper insert through the fan-shaped opening, and the conical top of the pre-tightening spring are positioned on the same straight line. The utility model discloses limited conical spring's maximum compression volume, avoided conical spring and tight jam, and replaced the metalwork with injection molding integrated configuration, reduced manufacturing procedure and spare part disability rate, shortened product production cycle.

The adapter is internally provided with a one-way sealing ball, in order to ensure the one-way sealing effect of the sealing ball, a conical spring is required to be arranged on the inner side of the sealing ball, and the sealing ball is pushed and pressed against the sealing gasket through the conical spring so as to realize one-way sealing. The foaming gun which is frequently used usually has no problem of solidification blockage, but in the practical application process, due to various reasons, the foaming gun can be stopped for a long time, solid crystals can be generated at the conical spring which is immersed in the foaming agent, and after the solid crystals are more, the conical spring can be inactivated, so that the sealing between the sealing ball and the sealing washer can be influenced. When unloading the foaming jar, because the ball sealer can not in time contradict sealed packing and circle, and make the blowing agent in the rifle pipe can be from the outside that the clearance department between ball sealer and the seal packing refluxes the adapter, need in time wash these refluxes to can bring the trouble in using.

Disclosure of Invention

The technical problems to be solved by the invention are as follows: the installation adapter can be suitable for installation of a foaming tank, and can conveniently block or open a liquid flow channel as required so as to meet the actual use requirement of a foaming gun.

The technical measures adopted for solving the technical problems are as follows: the utility model provides a foaming rifle foaming tank installation adapter, the foaming rifle include the rifle body, the internal liquid cavity that leads to that is equipped with of rifle, its characterized in that includes:

the mounting rack is connected to the gun body in a circumferential rotation and axial limiting manner and is provided with a connecting structure for connecting with the foaming tank;

the valve core is fixedly connected with the gun body and used for realizing the connection of the mounting frame on the gun body;

the upper end of the valve nozzle is provided with a socket for the insertion of a nozzle on the foaming tank, the valve nozzle is sleeved on the valve core, and the valve nozzle and the valve core are in liquid seal;

the actuating structure is arranged between the mounting frame and the valve core, and the rotating mounting frame causes the valve nozzle to axially move through the actuating structure;

the liquid flow channel is positioned in the valve nozzle and the valve core and is communicated with the bearing port and the liquid through cavity, and the valve core, the valve nozzle and the mounting frame are coaxially arranged;

the blocking structure is positioned in the liquid flow channel and arranged between the valve nozzle and the valve core, and the valve nozzle moving axially enables the blocking structure to be closed to block or open the liquid flow channel so as to realize the conduction of the liquid flow channel.

The connecting structure can be a positive internal thread which is arranged in the positive direction as described below, a positive external thread is correspondingly arranged on the outer peripheral surface of the end part of the foaming tank in the positive direction, and the foaming tank and the mounting frame are connected and fixed through the positive internal thread and the positive external thread. The connecting structure can also be a clamping structure, and the foaming tank and the mounting rack are clamped mutually to realize connection and fixation. The blocking structure is usually a mechanical seal, and axial movement of the valve nozzle causes the blocking structure to open or close. Before the foam tank is removed, the closing of the blocking structure is usually realized by rotating the mounting frame so as to prevent the foaming agent remained in the gun tube from flowing back to the outside from the adapter.

Further, on the mounting frame, the coupling structure is arranged at the upper position of the mounting frame, a cylindrical socket part is arranged at the lower position of the mounting frame, and the actuating structure is arranged in the socket part. Through being provided with the portion of cup jointing, and conveniently realize the axial motion of valve nozzle through the mounting bracket, compact structure nature is good, the installation of being convenient for.

Further, the coupling structure is a positive internal thread arranged in a positive direction. The forward direction is the direction in which the thread is threaded, which is generally the most common direction, and the reverse direction is opposite to the forward direction.

Further, the actuating structure comprises a thread structure reversely arranged between the valve mouth and the socket. The reverse set of threads and the forward set of threads are opposite in helical direction and when the mounting bracket is rotated, the valve nozzle is moved in the desired axial direction. Especially when the foaming tank is dismounted, the foaming tank can rotate in the direction which is suitable for the forward arrangement of the threads, and the blocking structure is closed before the foaming tank rotates relative to the mounting frame in the circumferential direction, so that the foaming agent in the gun pipe cannot flow back even if a nozzle on the foaming tank is separated from a bearing hole. When the foaming tank is assembled, the mounting frame can be located at a fixed position, the blocking structure is in a closed state, after the foaming tank is assembled in place, the mounting frame is driven by the foaming tank to continue rotating along the assembling direction, and the valve nozzle is also pushed open to the nozzle on the foaming tank after the blocking structure is opened, so that the foaming agent in the foaming tank can smoothly enter the liquid flow channel.

Further, the actuating structure comprises a thread structure which is reversely arranged between the valve nozzle and the valve core, and the sleeving part and the valve nozzle are fixedly sleeved in the circumferential direction. The valve nozzle is connected with the valve core through the threaded structure reversely arranged between the valve nozzle and the valve core, so that the valve nozzle is simple in structure and convenient to axially move relative to the valve core. The non-circular fit is adopted between the sleeve joint part and the valve nozzle, namely the fit between the prism body and the prism hole or the fit of other special-shaped structures, so that the circumferential transmission between the mounting frame and the valve nozzle is realized.

Further, the mounting bracket is of a revolving body structure and further comprises an intermediate portion and a mounting portion, the outer diameter of the intermediate portion is larger than that of the sleeving portion, the outer diameter of the mounting portion is larger than that of the intermediate portion, the intermediate portion is located between the mounting portion and the sleeving portion in the axial direction, and the positive internal threads are arranged on the inner circumferential surface of the mounting portion. This makes the holistic outer peripheral face of mounting bracket be the stairstepping structure to be convenient for holding of hand, when installing the foam tank on the mounting bracket, simple to operate is swift.

Further, the foaming tank is assembled under the condition that the plugging structure is in a state of plugging the liquid flow channel, and after the foaming tank is installed in place, the mounting frame is rotated to enable the valve nozzle to push open the nozzle on the foaming tank and open the plugging structure synchronously; when the foaming tank is detached, the blocking structure is in a state of blocking the liquid flow channel. When the assembly of foaming tank is carried out, the mounting bracket can be held by the aid of the movable limiting structures or hands, so that the mounting bracket is circumferentially fixed. The opening of the blocking structure and the ejection of the nozzle on the foaming tank are carried out synchronously, so that the foaming agent can be well ensured to enter the liquid through cavity in the gun body timely and smoothly. When the foaming tank is detached, the blocking structure is in a closed state, and the foaming agent in the gun tube cannot flow back to the position of the mounting frame.

Furthermore, a through hole is arranged in the valve core along the axial direction of the valve core, the through hole forms a part of the liquid flow channel, a blocking block is integrally formed at one end part of the valve core inserted in the valve nozzle, a spigot is arranged at the position of the liquid flow channel in the valve core, and the blocking block and the spigot form the blocking structure. The plugging structure is simple, convenient to arrange and capable of being well adapted to the axial movement of the valve nozzle.

Furthermore, the through hole is positioned at the axis position of the valve core, the blocking block is positioned at the through hole position, and two sides of the root part of the blocking block are respectively provided with a through hole communicated with the through hole. This makes it convenient to realize the stable cooperation between jam piece and the tang, simple structure.

Furthermore, an inward convex ring is integrally formed on the inner peripheral surface of the outer end of the sleeving part, an outward pressing ring is integrally formed on the outer peripheral surface of the middle position of the valve core, and the outward pressing ring is pressed and connected to the outer side of the inward convex ring. Through outside clamping ring and the crimping cooperation between the inside bulge loop to can realize well that the stability of mount frame on the rifle body is good spacing to the axial of mounting bracket.

The invention has the following beneficial effects:

1. through be provided with block structure in flow channel to block structure's opening and closing are caused by the axial motion of valve mouth, and the axial motion of valve mouth is started by the mounting bracket, and this makes the operation to block structure seem convenient and fast, can utilize the current structure on the foaming rifle well, makes the simple structure of this installation adapter, is convenient for set up, and can realize lightly operating laborsavingly.

2. The closing and the opening of the plugging structure are caused by the axial movement of the valve nozzle, the axial movement of the valve nozzle is controlled by people through the mounting frame, the plugging structure cannot fail due to long-time nonuse, so that when the foaming tank is replaced or is detached, the foaming agent in the gun tube is not easy to flow back to the outer side of the adapter, and the actual use requirement of the foaming gun can be well met.

3. The setting and the starting mechanism of the blocking structure can realize that the nozzle on the foaming tank is opened by jacking and the blocking structure is opened to keep synchronization, and the leakage of foaming agent is not easy to occur when the foaming tank is assembled, so that the foaming gun can keep clean in the using process.

Drawings

Fig. 1 is a structural view of a foaming gun with the present mounting adapter.

FIG. 2 is an assembled longitudinal sectional view of the present mounting adapter of one embodiment.

FIG. 3 is a longitudinal cross-sectional view of a valve nozzle in the present mounting adapter of one embodiment.

FIG. 4 is a longitudinal cross-sectional view of a valve cartridge in the present mounting adapter of one embodiment.

FIG. 5 is a longitudinal sectional view of a mount in the present mount adapter of an embodiment.

FIG. 6 is an assembled longitudinal sectional view of the present mounting adapter of another embodiment.

FIG. 7 is a longitudinal cross-sectional view of a valve nozzle in the present mounting adapter in accordance with another embodiment.

FIG. 8 is a longitudinal cross-sectional view of a valve cartridge in the present mounting adapter according to another embodiment.

Fig. 9 is a longitudinal sectional view of a mount in the present mount adaptor of another embodiment.

In the figure, 1, a gun barrel; 2. a gun body; 3. a mounting frame; 31. an installation part; 32. an intermediate portion; 33. a socket joint part; 34. an inward convex ring; 4. a needle bar; 5. an adjustment mechanism; 6. a grip; 7. a valve nozzle; 71. a socket; 72. stopping the opening; 8. a valve core; 81. outward pressing a ring; 82. penetrating through the mouth; 83. a plugging block; 84. through holes; 9. a seal ring; 10. and a clamp spring.

Detailed Description

With the attached drawings of the specification, the installation adapter is applied to a foaming gun and used for realizing the installation of a foaming tank with a foaming agent stored therein. Referring to fig. 1, the foaming gun structurally comprises a gun body 2, a liquid through cavity is arranged in the gun body 2, a gun barrel 1 is connected to the front side of the gun body 2, the gun barrel 1 is communicated with the inside of the liquid through cavity, a handle 6 is arranged on the rear side of the gun body 2, the inner end of a needle rod 4 extends into the gun barrel 1, and the outer end of the needle rod 4 is connected with a flow regulating mechanism 5 on the gun body 2.

The structure of the mounting adapter comprises a mounting frame 3, wherein the mounting frame 3 is connected to a gun body 2 in a circumferential rotation and axial limiting manner. The upper end side of the mounting frame 3 is positively provided with a positive internal thread, the outer end part of the foaming tank is provided with a coupling head, the coupling head is positively provided with a positive external thread, and the positive internal thread and the positive external thread are coupled together to realize the coupling and fixing of the foaming tank on the mounting frame 3. The gun body 2 is connected with a valve core 8 in a threaded manner, a threaded hole in the gun body 2, which is connected with the valve core 8 in a threaded manner, is communicated with a liquid through cavity in the gun body 2, and the valve core 8 is of a hollow structure. The valve core 8 is sleeved with a hollow valve nozzle 7, and liquid sealing is realized between the valve nozzle 7 and the valve core 8 through at least two sealing rings 9. A socket 71 is provided in the upper end of the valve nozzle 7, and a bottom ring is formed in the socket 71. After the foaming tank is screwed on the mounting frame 3, the nozzle on the foaming tank is inserted in the socket 71, the outer end part of the nozzle is supported by the bottom ring, and after the bottom ring presses the nozzle, the nozzle is opened, and the foaming agent flows out of the nozzle in a liquid form.

The valve nozzle 7 is movably arranged in the mounting frame 3, that is, the valve nozzle 7 can axially move in the mounting frame 3, an actuating structure is arranged between the mounting frame 3 and the valve core 8, and the axial movement of the valve nozzle 7 is caused by the transmission of the mounting frame 3 through the actuating structure. Typically, the body of the actuating structure is a reversed set of mutually coupled cooperating screw thread structures, the relative circumferential rotation of which, and thus the axial movement of the valve mouth 7, is achieved by rotation of the mounting frame 3.

The valve core 8, the valve nozzle 7 and the mounting frame 3 are coaxially arranged, a liquid flow channel is formed inside the hollow valve core 8 and the valve nozzle 7, the liquid flow channel is communicated with the faucet 71 and a liquid through cavity, and foaming agents enter the liquid through cavity in the gun body 2 from the faucet 71. A blocking structure is arranged in the liquid flow channel and is arranged between the valve nozzle 7 and the valve core 8. As a result of the axial movement of the valve mouth 7, the closure structure is closed to close the flow channel or opened to open the flow channel.

The mounting bracket 3 is of a revolving body structure and comprises a sleeve joint part 33, an intermediate part 32 and a mounting part 31 which are connected into a whole, and the three parts are all hollow cylinders, so that a mounting cavity is formed in the mounting bracket 3, and the valve core 8 and the valve nozzle 7 are assembled in the mounting cavity. The outer diameter of the intermediate portion 32 is shown to be larger than that of the socket portion 33, and the outer diameter of the mounting portion 31 is shown to be larger than that of the intermediate portion 32; in the axial direction, the intermediate portion 32 is located between the mounting portion 31 and the socket portion 33, the female forward thread is provided on the inner peripheral surface of the mounting portion 31, and the actuating structure is provided in the socket portion 33.

As an embodiment, the actuating structure includes a thread structure reversely arranged between the valve nozzle 7 and the socket part 33 of the mounting bracket 3, wherein a reverse internal thread is reversely arranged on the inner circumferential surface of the socket part 33, and an external thread adapted to the reverse internal thread is arranged on the outer circumferential surface of the valve nozzle 7. By rotating the mounting frame 3, the valve mouth 7 is rotated on the valve core 8, so that the valve mouth 7 moves axially on the valve core 8.

As another embodiment, the actuating structure includes a thread structure oppositely disposed between the valve nozzle 7 and the valve core 8, an opposite internal thread is oppositely disposed on an inner circumferential surface of the valve nozzle 7, and an external thread adapted to be coupled with the opposite internal thread is disposed on an outer circumferential surface of the valve core 8. The sleeving part 33 and the valve nozzle 7 are in clearance sleeving fit between the prism and the prism hole, so that the sleeving part 33 can drive the valve nozzle 7 to rotate on the valve core 8 in the circumferential direction, and further the valve nozzle 7 moves on the valve core 8 in the axial direction.

The reverse and forward arrangements are relative to each other, and the screw threads of the forward and reverse arrangements are opposite to each other with respect to the screw direction of the internal screw thread provided on the mounting portion 31 of the mounting bracket 3. The forward arrangement refers to a common internal thread arrangement direction, and when the foaming tank is rotated clockwise, a connecting head on the foaming tank is connected and fixed with the mounting part 31; when the foaming tank is rotated anticlockwise, the foaming tank can be detached from the foaming gun.

The valve element 8 is provided with a through hole 84 along its axial direction, the through hole 84 penetrating the valve element 8 in the axial direction of the valve element 8, the through hole 84 constituting a part of the flow passage. A blocking block 83 is integrally formed at one end of the valve element 8 inserted into the valve nozzle 7, that is, at the upper end of the valve element 8, and the blocking block 83 protrudes to the outside of the upper end of the valve element 8. A spigot 72 is formed in the valve core 8 through an inward protruding structure, the liquid flow channel passes through the spigot 72, the blocking block 83 is matched with the spigot 72, the blocking block 83 and the spigot 72 form the blocking structure, and the blocking block 83 is abutted against the spigot 72, so that the liquid flow channel can be cut off; the blocking block 83 is separated from the spigot 72, and the conduction of the liquid flow channel can be realized.

The through hole 84 is located at the axial position of the valve core 8, and the blocking block 83 is located outside the through hole 84 and opposite to the through hole 84. Two sides of the root of the blocking block 83 are respectively provided with a through hole 82 communicated with the through hole 84, the valve core 8 is a casting part, the blank of the valve core 8 is a blank with one end closed and the other end open, the closed end is generally in a spherical crown shape, two opposite sides of the closed end are respectively provided with a notch, so that the through hole 82 communicated with the inside of the through hole 84 is formed at the root of the blocking block 83, and the through hole 84 is communicated with the valve core 8. The spigot 72 can be a concave spherical structure, and the spigot 72 can be attached to the spherical-crown-shaped plugging block 83 to realize liquid sealing.

An inward projecting ring 34 is integrally formed on the inner peripheral surface of the outer end of the sleeve portion 33, and an outward pressing ring 81 is integrally formed on the outer peripheral surface of the middle portion of the valve body 8. Firstly, the valve core 8 is inserted into the mounting frame 3, after the valve core 8 is connected in place on the gun body 2, the outward pressing ring 81 is positioned on the outer side of the gun body 2 and has a certain interval with the gun body 2, the inward convex ring 34 is positioned in the interval, and the outward pressing ring 81 is pressed on the outer side of the inward convex ring 34, so that the axial limitation on the mounting frame 3 is realized, and the mounting frame 3 can rotate circumferentially on the valve core 8. In order to limit the upward movement of the valve nozzle 7, a snap spring 10 is arranged on the inner circumferential surface of the middle part 32 of the mounting frame 3, the snap spring 10 is arranged close to the mounting part 31, a protruding ring is integrally formed on the outer circumferential surface of the valve nozzle 7, and the upward movement amplitude of the valve nozzle 7 is limited by the blocking of the protruding ring by the snap spring 10 so as to prevent the valve nozzle 7 from pushing against and damaging a nozzle on the foaming tank.

Based on the aforesaid structure of this installation adapter, when carrying out the installation of foaming tank, make mounting bracket 3 remain stable usually to avoid under the drive of mounting bracket 3, the enclosed construction is in open mode. To achieve a stable position of the mounting frame 3 on the gun body 2, the stepped mounting frame 3 is held by hand and then the foam can is screwed to the mounting portion 31 of the mounting frame 3. The gun body 2 can be provided with an eccentric structure, a notch is arranged at the corresponding position of the mounting rack 3, the eccentric structure is clamped in the notch through pulling operation, and after the foam tank is mounted, clamping stagnation of the eccentric structure is relieved. When the foaming tank is installed, the blocking structure is in a closed state. After the foaming tank is installed in place, the foaming tank continues to rotate in the assembling direction, the mounting frame 3 can rotate on the valve core 8, and the valve nozzle 7 jacks up a nozzle on the foaming tank and is opened synchronously with the plugging structure. When foaming tank is lifted off to needs, along the direction of taking apart rotation foaming tank, foaming tank drives mounting bracket 3 antiport, and antiport 3 of antiport makes aforementioned jam block 83 contradict together with tang 72, and realized shutoff structure's closing. Just because the block structure is in the closed condition, mounting bracket 3 can not continue the antiport to realize relative antiport between foaming tank and the mounting bracket 3, accomplish the dismantlement of foaming tank. Therefore, before the foam tank is removed, the closure structure is in a closed state, so that the blowing agent in the barrel 1 is prevented from flowing back after the foam tank is removed, before the nozzle on the foam tank is disengaged from the bottom ring.

Claims

1. The utility model provides a foaming rifle foaming tank installation adapter, the foaming rifle include the rifle body, the internal liquid cavity that leads to that is equipped with of rifle, its characterized in that includes:

2. The adapter as claimed in claim 1, wherein the coupling structure is provided at an upper position of the mounting frame and the actuating structure is provided in a socket portion having a cylindrical shape at a lower position of the mounting frame.

3. The foam gun foam can mounting adapter as recited in claim 2 wherein the coupling structure is a positively disposed, positively threaded internal thread.

4. The foam gun foam can mounting adapter of claim 3, wherein the actuation structure comprises a reverse threaded structure between the valve nozzle and the socket portion.

5. The adapter of claim 3, wherein the actuating structure comprises a threaded structure disposed in opposite directions between the valve nozzle and the valve core, and the sleeve portion is circumferentially and fixedly sleeved with the valve nozzle.

6. The adapter for mounting the foam tank of the foam gun according to claim 3, 4 or 5, wherein the mounting frame is of a revolving structure, and further comprises an intermediate portion and a mounting portion, wherein the outer diameter of the intermediate portion is larger than that of the sleeve portion, the outer diameter of the mounting portion is larger than that of the intermediate portion, the intermediate portion is located between the mounting portion and the sleeve portion in the axial direction, and the positive internal thread is arranged on the inner circumferential surface of the mounting portion.

7. The adapter for mounting a foam tank of a foam gun according to claim 1, 2, 3, 4 or 5, wherein the foam tank is assembled with the blocking structure in a state of blocking the liquid flow channel, and after the foam tank is mounted in place, the mounting frame is rotated to open the nozzle on the foam tank by the valve nozzle in synchronization with the opening of the blocking structure; when the foaming tank is detached, the blocking structure is in a state of blocking the liquid flow channel.

8. The adapter for mounting a foam cylinder of a foam gun according to claim 7, wherein the valve body has a through hole formed therein along an axial direction thereof, the through hole forming a part of the liquid flow passage, a stopper block is integrally formed on an end portion of the valve body inserted into the valve nozzle, and a spigot is formed in the valve body at a position in the liquid flow passage, the stopper block and the spigot forming the stopper structure.

9. The adapter for mounting a foam cylinder of a foam gun according to claim 8, wherein the through hole is located at the axial position of the valve core, the blocking block is located at the through hole, and two sides of the root of the blocking block are respectively provided with a through hole communicated with the through hole.

10. The adapter for mounting a foam tank of a foam gun according to claims 2, 3, 4, and 5, wherein an inward protruding ring is integrally formed on an inner peripheral surface of an outer end of the sleeve portion, and an outward pressing ring is integrally formed on an outer peripheral surface of a middle portion of the valve body, the outward pressing ring being pressed against an outer side of the inward protruding ring.