Quantitative valve and aerosol

Abstract

The utility model provides a proportional valve which comprises a fixing cover, a valve chamber and a valve rod assembly. The fixing cover is provided with a containing cavity. One end of the valve chamber is arranged in the containing cavity, a sealing piece is arranged between the valve chamber and the fixing cover, the valve chamber is provided with a quantitative cavity, one end of the quantitative cavity is provided with a feeding port for materials to enter, and the other end of the valve chamber is provided with a sealing piece. The valve rod assembly comprises a valve element, an elastic piece and a valve rod piece. The valve element is elastically installed in the quantitative cavity through the elastic piece so as to axially move to abut against the sealing piece or block the feeding port. One end of the valve rod piece penetrates through the sealing piece and extends into the valve element, the valve rod piece is hollow, and a feeding gap for feeding is formed between the valve rod piece and the valve element; the valve rod piece is pressed to push the valve element to be separated from the sealing piece, so that a feeding area for materials to enter the valve element is formed between the valve element and the sealing piece, and one end of the valve element blocks the feeding opening; materials in the quantitative cavity pass through the feeding area, then enter the valve rod piece through the feeding gap and are discharged. The utility model further provides an aerosol.

Description

Technical Field

[0001] The utility model relates to the technical field of aerosol products, in particular to a metering valve and an aerosol. Background Art

[0002] An aerosol product refers to a product in which the content is hermetically contained in a container with a volume not greater than 1L equipped with a valve, and the content is released in a predetermined form under the pressure of a propellant when in use. Such products are used in a spraying manner, and the ejected matter can be in a solid, liquid or gaseous state, and the ejected shape can be divided into a mist, foam, powder, and micelle. An aerosol valve is a closed mechanical device fixed on an aerosol container, and its closed state can ensure that the content does not leak, while when actuated, it can make the content eject through the actuator in a predetermined form and speed. In a non-working state, under the pressure of a spring, the valve is in a closed state. In a working state, when the actuator is pressed, the valve stem moves downward, causing the flow hole to move away from the sealing ring, and the content passes through the liquid guiding pipe, flow hole, mixing chamber and finally ejects from the spray hole of the actuator. When the spring pushes the valve stem back, the valve closes again. In some specific situations, it is necessary to quantitatively spray the valve to avoid under-dosage or over-dosage.

[0003] The metering valve has a valve chamber for metering inside the container, one end of the valve stem extends outside the container, and the other end of the valve stem is placed inside the container and located in the valve chamber. In the prior art, the valve stem is provided with a material outlet and a material inlet. In a non-use state, both the material outlet and the material inlet are opened at one end of the valve stem located outside the container. When in use, the valve stem is pressed down so that the material inlet enters the valve chamber, and the material in the valve chamber is released from the material outlet of the valve stem through the material inlet. After spraying is completed, the valve stem is released, and the material inlet resets to the outside of the container, and the material in the valve chamber will no longer spray out. At this time, the valve chamber is replenished with material. However, the material in the valve stem will be discharged outside the container through the material inlet, resulting in leakage, affecting the appearance and use experience.

[0004] Therefore, it is necessary to provide a metering valve that can both quantitatively release the material and has no leakage after the material release is completed. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a metering valve that can both quantitatively release the material and has no leakage after the material release is completed.

[0006] Another purpose of the utility model is to provide an aerosol, which has the above-mentioned metering valve.

[0007] To achieve the above purpose, the utility model provides a metering valve, comprising:

[0008] A fixed cover having an accommodation cavity;

[0009] The valve chamber has one end placed in the accommodating cavity, and a seal is provided between the valve chamber and the fixed cover. The valve chamber has a metering cavity. One end of the metering cavity is provided with a feed port for the material to enter, and the other end of the metering cavity is open to form an opening. The seal is installed at the opening.

[0010] The valve rod assembly includes a valve core, an elastic member, and a valve rod. The valve core is elastically installed in the metering cavity by means of the elastic member so as to be axially movable to abut against the seal or block the feed port. One end of the valve rod passes through the seal and extends into the valve core. The valve rod is hollow and there is a feeding gap for feeding material between the valve rod and the valve core. Press the valve rod to push the valve core away from the seal to form a feeding area for the material to enter the valve core between the valve core and the seal, and one end of the valve core blocks the feed port. The material in the metering cavity enters the valve rod through the feeding area and then through the feeding gap and is discharged.

[0011] After adopting the above technical solutions, the metering valve of the present utility model includes a fixed cover, a valve chamber, and a valve rod assembly. The fixed cover is used to position the valve chamber and the valve rod assembly. The fixed cover has an accommodating cavity, and the valve chamber and the valve rod assembly are installed in the accommodating cavity. One end of the valve chamber is placed in the accommodating cavity, and a seal is provided between the valve chamber and the fixed cover. The valve chamber has a metering cavity. One end of the metering cavity is provided with a feed port for the material to enter, and the other end of the valve chamber is open to form an opening. The seal is installed at the opening. That is, the feed port is located at one end of the metering cavity, and the seal is located at the other end of the metering cavity. The valve rod assembly includes a valve core, an elastic member, and a valve rod. The valve core is elastically installed in the metering cavity by means of the elastic member and can axially move in the metering cavity to abut against the seal or block the feed port. When the valve core abuts against the seal, the feed port is open, and the material can enter the metering cavity through the feed port. When the valve core leaves the seal, one end of the valve core blocks the feed port, and the material no longer enters the metering cavity. The metered material in the metering cavity enters the valve core through the feeding area between the seal and the valve core. On the other hand, one end of the valve rod passes through the seal and extends into the valve core, and the other end of the valve rod is located outside the fixed cover. The valve rod is hollow and there is a feeding gap for feeding material between the valve rod and the valve core. Specifically, press the valve rod, and the valve rod pushes the valve core away from the seal to form a feeding area for the material to enter the valve core between the valve core and the seal, and one end of the valve core blocks the feed port. The material in the metering cavity enters the valve core through the feeding area, and then enters the valve rod through the feeding gap and is discharged. The metering valve of the present utility model has a compact and reasonable structure, can meter the material through the metering cavity, and is used for feeding. The opening and closing of the feeding area for the valve rod assembly is carried out by pressing the valve rod. There will be no leakage after the material release is completed, and the use effect is better.

[0012] Preferably, an installation groove for installing the seal is provided at the opening. The seal is installed in the installation groove and one end abuts against the fixed cover.

[0013] Preferably, a plurality of bumps are circumferentially protruded near the feeding port of the metering chamber. One end of the elastic member abuts against the valve core, the other end abuts against the inner wall of the metering chamber, and the side surface of the elastic member abuts against the plurality of bumps.

[0014] Preferably, a stopper cooperating with the elastic member is provided on the valve core, and one end of the elastic member abuts against the stopper.

[0015] Preferably, a plurality of protrusions are protruded on the outer wall of the valve core, the protrusions are attached to the metering chamber, and a flow interval for the material to flow is formed between the two protrusions, and the flow interval can communicate with the feeding area.

[0016] Preferably, one end of the valve core is provided with a guiding portion and a sealing portion. The guiding portion is arranged at the end of the valve core and always passes through the feeding port, and the outer diameter of the guiding portion is smaller than the aperture of the feeding port; the sealing portion is close to the guiding portion, and the sealing portion has a gradually changing structure with a gradually increasing cross-sectional area from one end to the other end of the guiding portion. The valve rod member drives the sealing portion to gradually extend into the feeding port until the feeding port is blocked.

[0017] Preferably, the valve core is provided with an inner cavity for accommodating the valve rod member. A plurality of mounting blocks are circumferentially protruded in the inner cavity. Threads cooperating with the valve rod member are provided on the mounting blocks. One end of the valve rod member is attached to the mounting block, and a feeding gap for the material to pass through is formed between the two mounting blocks.

[0018] Preferably, a top block is arranged at one end of the inner cavity, and one end of the valve rod member abuts against the top block. Pressing the valve rod member pushes against the top block so that the valve core moves along the metering chamber to disengage from the seal and block the feeding port.

[0019] Preferably, the seal is provided with a mounting hole for the valve rod member to extend into, and the valve rod member passes through the mounting hole and is in interference fit with the mounting hole.

[0020] To achieve the above another object, the present invention provides an aerosol, including a container for filling materials, and further including the above-mentioned metering valve. The metering valve is installed on the container by a fixing cover and is hermetically arranged with the container.

[0021] After adopting the above technical solutions, the aerosol of the present invention includes a container and a metering valve. The container is used to hold various materials, and the metering valve enables the materials in the container to be discharged quantitatively. After using the metering valve of the present invention, there will be no leakage after the aerosol is quantitatively released, and the use experience is better. Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1 It is a structural diagram of a quantitative valve provided in one embodiment of the utility model.

[0024] Figure 2 yes Figure 1 sectional view of .

[0025] Figure 3 yes Figure 2 Enlarged view of point A in the middle.

[0026] Figure 4 yes Figure 2 Cross-sectional view in another state.

[0027] Figure 5 yes Figure 4 Enlarged view of point B in the middle.

[0028] Figure 6 yes Figure 1 Structural breakdown diagram.

[0029] Figure 7 yes Figure 6 Structural diagram of the middle valve chamber.

[0030] Figure 8 yes Figure 6 Structural diagram of the middle valve core.

[0031] Figure 9 yes Figure 8 sectional view of .

[0032] Figure 10 yes Figure 6 Cross-sectional view of the valve stem.

[0033] Figure 11 It is a structural diagram of an aerosol provided by an embodiment of the utility model.

[0034] Description of reference numerals:

[0035] 1000, aerosol; 100, metering valve; 10, fixed cover; 11, accommodating cavity; 20, valve chamber; 201, feeding area; 21, metering cavity; 22, feeding port; 23, opening; 24, mounting groove; 25, convex block; 30, valve stem assembly; 31, valve core; 311, top block; 312, inner cavity; 313, mounting block; 3131, texture; 314, convex part; 315, guide part; 316, sealing part; 317, flow interval; 318, feeding gap; 319, stopper; 32, valve stem member; 321, channel; 322, matching part; 33, elastic member; 40, liquid introduction tube; 50, sealing member; 51, mounting hole; 200, container. DETAILED DESCRIPTION

[0036] To illustrate the technical content and structural features of the present utility model in detail, the following further description is made in conjunction with the embodiments and with reference to the drawings.

[0037] Please refer to Figures 1 to 6 , the present utility model provides a metering valve 100, which includes a fixed cover 10, a valve chamber 20, a seal 50 and a valve rod assembly 30. The fixed cover 10 has a receiving cavity 11 for installing the valve chamber 20, the seal 50 and the valve rod assembly 30. One end of the valve chamber 20 is placed in the receiving cavity 11, and a seal 50 is provided between the valve chamber 20 and the fixed cover 10. The seal 50 can seal the fixed cover 10, the valve chamber 20 and the valve rod member 32. Among them, the valve chamber 20 has a metering cavity 21. One end of the metering cavity 21 is provided with a feed inlet 22 for the material to enter, and the other end of the metering cavity 21 is open to form an opening 23, and the seal 50 is installed at the opening 23. The valve rod assembly 30 includes a valve core 31, an elastic member 33 and a valve rod member 32. The valve core 31 is elastically installed in the metering cavity 21 by means of the elastic member 33, so that the valve core 31 can axially move in the metering cavity 21 to abut against the seal 50 or block the feed inlet 22. When the valve core 31 abuts against the seal 50, the feed inlet 22 is opened and the metering cavity 21 is fed. When the valve core 31 disengages from the seal 50 and blocks the feed inlet 22, an open feed area 201 is formed between the valve core 31 and the seal 50, and the material in the metering cavity 21 can enter the valve core 31 through the feed area 201. On the other hand, one end of the valve rod member 32 passes through the seal 50 and extends into the valve core 31. The valve rod member 32 is hollow and there is a feeding gap 318 for feeding between the valve rod member 32 and the valve core 31. Specifically, the valve rod member 32 is pressed to push the valve core 31 away from the seal 50 to form a feed area 201 for the material to enter the valve core 31 between the valve core 31 and the seal 50, and one end of the valve core 31 blocks the feed inlet 22. The material in the metering cavity 21 enters the valve rod member 32 through the feed area 201 and then through the feeding gap 318 and is discharged through the valve rod member 32. When the valve rod member 32 is released, the elastic member 33 drives the valve core 31 to reset to abut against the seal 50, the feed inlet 22 is opened again, and the metering cavity 21 is fed.

[0038] After adopting the above technical solution, the metering valve 100 of the present utility model includes a fixed cover 10, a valve chamber 20 and a valve rod assembly 30. The fixed cover 10 is used to position the valve chamber 20 and the valve rod assembly 30. The fixed cover 10 has a receiving cavity 11, and the valve chamber 20 and the valve rod assembly 30 are installed in the receiving cavity 11. One end of the valve chamber 20 is placed in the receiving cavity 11, and a seal 50 is provided between the valve chamber 20 and the fixed cover 10. The valve chamber 20 has a metering cavity 21 for metering materials. One end of the metering cavity 21 is provided with a feed port 22 for the material to enter. The other end of the valve chamber 20 is open to form an opening 23, and the seal 50 is installed at the opening 23. That is, the feed port 22 is located at one end of the metering cavity 21, and the seal 50 is located at the other end of the metering cavity 21. The valve rod assembly 30 includes a valve core 31, an elastic member 33 and a valve rod member 32. The valve core 31 is elastically installed in the valve chamber 20 by means of the elastic member 33 and can axially move in the metering cavity 21 to abut against the seal 50 or block the feed port 22. When the valve core 31 abuts against the seal 50, the feed port 22 is opened, and the material can enter the metering cavity 21 through the feed port 22. When the valve core 31 leaves the seal 50, one end of the valve core 31 blocks the feed port 22, and the material no longer enters the metering cavity 21. The metered material in the metering cavity 21 enters the valve core 31 through the feed area 201 between the seal 50 and the valve core 31. On the other hand, one end of the valve rod member 32 passes through the seal 50 and extends into the valve core 31, and the other end of the valve rod member 32 is located outside the fixed cover 10. The valve rod member 32 is hollow and there is a feeding gap 318 for feeding between the valve rod member 32 and the valve core 31. Specifically, by pressing the valve rod member 32, the valve rod member 32 pushes the valve core 31 away from the seal 50 to form a feed area 201 for the material to enter the valve core 31 between the valve core 31 and the seal 50, and one end of the valve core 31 blocks the feed port 22. The material in the metering cavity 21 enters the valve core 31 through the feed area 201, and then enters the valve rod member 32 through the feeding gap 318 and is discharged. The metering valve 100 of the present utility model has a compact and reasonable structure, can meter materials through the metering cavity 21, and the feeding into the feed area 201 of the valve rod assembly 30 is opened and closed by pressing the valve rod member 32, and there will be no leakage after the material release is completed, and the use effect is better.

[0039] Please refer to Figure 7 , in some alternative embodiments, an installation groove 24 for installing the seal 50 is provided at the opening 23. The seal 50 is installed in the installation groove 24 and one end abuts against the fixed cover 10, so that the fixed cover 10 and the valve chamber 20 are sealed, and at the same time, the fixed cover 10 and the valve rod member 32 are sealed.

[0040] Please refer to Figures 2 to 5, in some alternative embodiments, a plurality of bumps 25 are circumferentially protruded and provided near the feed port 22 of the metering chamber 21. One end of the elastic member 33 abuts against the valve core 31, the other end abuts against the inner wall of the metering chamber 21, and the side surface of the elastic member 33 abuts against the plurality of bumps 25. The plurality of bumps 25 provided in the metering chamber 21 can guide and position the elastic member 33, making the overall connection structure more stable. Among them, a stop block 319 cooperating with the elastic member 33 is provided on the outer wall of the valve core 31. The elastic member 33 is sleeved on the valve core 31, one end of the elastic member 33 abuts against the stop block 319, and the other end abuts against the inner wall of the metering chamber 21 near the feed port 22 in the metering chamber 21. The valve rod member 32 pushes the valve core 31 to squeeze the elastic member 33, so that the valve core 31 can extend into the feed port 22 and block the feed port 22. Among them, one end of the feed port 22 is connected with a liquid guiding pipe 40 for guiding the material.

[0041] Please refer to Figure 8 , in some alternative embodiments, a plurality of protrusions 314 are protruded on the outer wall of the valve core 31. The protrusions 314 are attached to the metering chamber 21, and a flow interval 317 for the material to flow is formed between the two protrusions 314. The flow interval 317 can communicate with the feed zone 201. It can be understood that by providing the protrusions 314, the cooperation between the valve core 31 and the metering chamber 21 can be made stable, and the valve core 31 can be prevented from completely fitting against the inner wall of the metering chamber 21 and affecting the conveyance of the material. When the material is quantitatively released, the material can flow from the flow interval 317 between the two protrusions 314 in the metering chamber 21 containing the material to the feed zone 201, then enter the valve core 31, and then be released to the outside through the valve rod member 32.

[0042] Please refer to Figure 8 and Figure 9, in some alternative embodiments, one end of the valve core 31 is provided with a guiding portion 315 and a sealing portion 316. Among them, the guiding portion 315 is arranged at the end of the valve core 31 and constantly passes through the feed port 22. The outer diameter of the guiding portion 315 is smaller than the aperture of the feed port 22, and the guiding portion 315 in the feed port 22 will not affect the material from entering the metering chamber 21. The guiding portion 315 is constantly placed in the feed port 22 without detaching from the feed port 22, and can guide the sealing portion 316 to better block the feed port 22. The guiding portion 315 is placed in the feed port 22, and at the same time, a plurality of bumps 25 are arranged in the metering chamber 21 to position the elastic member 33, so that when the valve core 31 axially moves in the metering chamber 21, it will not shift, thus being able to better block the feed port 22 of the metering chamber 21. When moving and compressing the elastic member 33, the sealing portion 316 enters the feed port 22 and gradually blocks the feed port 22, so as to quantitatively release the material through the metering chamber 21. Specifically, the position of the sealing portion 316 is close to the guiding portion 315, and the sealing portion 316 has a gradually changing structure with a gradually increasing cross-sectional area from one end to the other end of the guiding portion 315. The valve rod member 32 drives the sealing portion 316 to gradually extend into the feed port 22 from the small end until the feed port 22 is blocked. The overall structure is reasonably arranged, the feeding and discharging are convenient, and the sealing operation of the feed port 22 of the metering chamber 21 is convenient.

[0043] Please refer to Figures 8 to 10, in some alternative embodiments, the valve core 31 is provided with an inner cavity 312 for accommodating the valve rod member 32, and a plurality of mounting blocks 313 are circumferentially protruded in the inner cavity 312. The plurality of mounting blocks 313 are used to support and mount the valve rod member 32. Threads 3131 cooperating with the valve rod member 32 are provided on the mounting blocks 313, and a cooperating portion 322 cooperating with the mounting blocks 313 is provided on the outer side of the valve rod member 32. The cooperating portion 322 fits with the mounting blocks 313, so that one end of the valve rod member 32 fits against the mounting blocks 313, and the overall installation is stable. Among them, a feeding gap 318 for the material to pass through is formed between the two mounting blocks 313. The material in the metering cavity 21 sequentially passes through the flow interval 317 and the feeding area 201 and enters the inner cavity 312 of the valve core 31, and then enters the valve rod member 32 through the feeding gap 318. Specifically, a channel 321 for the material to flow through is penetrated in the valve rod member 32, and the material is released outside the container 200 through the channel 321 after entering the valve rod member 32. It can be understood that the mounting blocks 313 protrude from the inner cavity 312, which can prevent the valve rod member 32 from completely fitting against the inner cavity 312 of the valve core 31 and affecting the flow of the material. At the same time, the valve rod member 32 fits against the mounting blocks 313, making the overall structure stable and reliable. On the other hand, a top block 311 is provided at one end of the inner cavity 312. The top block 311 protrudes from the inner cavity 312 on the side and bottom surfaces, and one end of the valve rod member 32 abuts against the top block 311. When the valve rod member 32 is pressed, the valve rod member 32 pushes against the top block 311, and the top block 311 drives the valve core 31 to move along the metering cavity 21 to disengage from the seal 50 and block the feeding port 22.

[0044] Please refer to Figures 2 to 6 , in some alternative embodiments, the seal 50 is provided with a mounting hole 51 for the valve rod member 32 to extend into. The valve rod member 32 passes through the mounting hole 51 and is in interference fit with the mounting hole 51. It can be understood that the seal 50 is fixed between the fixed cover 10 and the valve chamber 20. The valve rod member 32 passes through the seal 50 and cooperates with the valve core 31. The seal 50 can seal between the fixed cover 10 and the valve rod member 32, and the seal 50 can also reinforce the installation of the valve rod member 32 in the valve core 31.

[0045] Please refer to Figure 11, the present utility model also provides an aerosol 1000, which includes a container 200 for filling materials, and also includes the above-mentioned metering valve 100. The metering valve 100 is installed on the container 200 by means of a fixed cover 10 and is hermetically arranged with the container 200. Various suitable materials that need to be quantitatively released can be filled in the container 200. After adopting the above technical solutions, the aerosol 1000 of the present utility model includes a container 200 and a metering valve 100. The container 200 is used to hold various materials, and the metering valve 100 enables the materials in the container 200 to be discharged quantitatively. After using the metering valve 100 of the present utility model, there will be no leakage after the aerosol 1000 is quantitatively released, and the use experience is better.

[0046] Such as Figures 1 to 11As shown in the figure, the aerosol 1000 of the present utility model includes a container 200 and a metering valve 100. The metering valve 100 includes a fixed cap 10, a valve chamber 20 and a valve stem assembly 30. The fixed cap 10 is used to position the valve chamber 20 and the valve stem assembly 30, and can install the valve chamber 20 and the valve stem assembly 30 on the container 200. The fixed cap 10 has a receiving cavity 11, and the valve chamber 20 and the valve stem assembly 30 are installed in the receiving cavity 11. One end of the valve chamber 20 is placed in the receiving cavity 11, and a seal 50 is provided between the valve chamber 20 and the fixed cap 10. The seal 50 can make the valve chamber 20 and the fixed cap 10 be sealed, and the seal ring can also make the fixed cap 10 and the valve stem 32 be sealed. At the same time, the seal 50 can also cooperate with the valve core 31 to open and close the feeding area 201 for the material to enter from the metering cavity 21 into the valve core 31. The valve chamber 20 has a metering cavity 21 for metering the material. One end of the metering cavity 21 is provided with a feeding port 22 for the material to enter, and a seal 50 is installed at the other end of the valve chamber 20. That is, the feeding port 22 is located at one end of the metering cavity 21, and the seal 50 is located at the other end of the metering cavity 21. The valve stem assembly 30 includes a valve core 31, an elastic member 33 and a valve stem 32. The valve core 31 is elastically movably installed in the metering cavity 21 through the elastic member 33, and can axially move in the metering cavity 21 to abut against the seal 50 or block the feeding port 22. When the valve core 31 abuts against the seal 50, the feeding port 22 is opened, and the material can enter the metering cavity 21 through the feeding port 22. When the valve core 31 leaves the seal 50, one end of the valve core 31 blocks the feeding port 22, and the material no longer enters the metering cavity 21. The metered material in the metering cavity 21 enters the valve core 31 through the feeding area 201 between the seal 50 and the valve core 31. On the other hand, one end of the valve stem 32 passes through the seal 50 and extends into the valve core 31, and the other end of the valve stem 32 is located outside the fixed cap 10. The valve stem 32 is hollowly arranged and there is a feeding gap 318 for feeding between the valve stem 32 and the valve core 31. Specifically, when the valve stem 32 is pressed, the valve stem 32 pushes the valve core 31 away from the seal 50 to form a feeding area 201 for the material to enter the valve core 31 between the valve core 31 and the seal 50, and one end of the valve core 31 blocks the feeding port 22. The material in the metering cavity 21 enters the valve core 31 through the feeding area 201, and then enters the valve stem 32 through the feeding gap 318 and is discharged. The aerosol 1000 of the present utility model has a metering valve 100, with a compact and reasonable structure, capable of metering the material through the metering cavity 21. The feeding area 201 is located inside the container 200 and is opened and closed by pressing the valve stem 32, which is convenient to operate. There will be no leakage outside the valve stem 32 after the material release is completed, and the use effect is better.

[0047] The above-disclosed are only the preferred embodiments of the present utility model, and the scope of rights of the present utility model cannot be limited thereby. Therefore, all equivalent changes made according to the claims of the present utility model fall within the scope covered by the present utility model.

Claims

1. A metering valve, characterized in that, Comprising: A fixed cover having a receiving cavity; A valve chamber, one end of which is placed in the receiving cavity and a seal is provided between the valve chamber and the fixed cover. The valve chamber has a metering cavity. One end of the metering cavity is provided with a feed inlet for the material to enter, and the other end of the metering cavity is open to form an opening. The seal is installed at the opening; A valve rod assembly including a valve core, an elastic member, and a valve rod member. The valve core is elastically installed in the metering cavity by the elastic member so as to be axially movable to abut against the seal or block the feed inlet; One end of the valve rod member passes through the seal and extends into the valve core. The valve rod member is hollow and there is a feed gap for feeding between the valve rod member and the valve core; Press the valve rod member to push the valve core away from the seal to form a feed area for the material to enter the valve core between the valve core and the seal, and one end of the valve core blocks the feed inlet; The material in the metering cavity enters the valve rod member through the feed area and then through the feed gap and is discharged.

2. The metering valve according to claim 1, wherein, An installation groove for installing the seal is provided at the opening, and the seal is installed in the installation groove and one end abuts against the fixed cover.

3. The metering valve according to claim 1, characterized in that, A plurality of protrusions are circumferentially protruded near the feed inlet of the metering cavity. One end of the elastic member abuts against the valve core, and the other end abuts against the inner wall of the metering cavity, and the side surface of the elastic member abuts against a plurality of the protrusions.

4. The metering valve according to claim 1, wherein A stop block cooperating with the elastic member is provided on the valve core, and one end of the elastic member abuts against the stop block.

5. The metering valve according to claim 1, characterized in that A plurality of protrusions are protruded on the outer wall of the valve core, and the protrusions are attached to the metering cavity. A flow interval for the material to flow is formed between the two protrusions, and the flow interval can communicate with the feed area.

6. The metering valve according to claim 1, wherein, One end of the valve core is provided with a guiding portion and a sealing portion. The guiding portion is provided at the end of the valve core and always passes through the feed inlet. The outer diameter of the guiding portion is smaller than the aperture of the feed inlet; The sealing portion is close to the guiding portion, and the sealing portion has a gradually changing structure with a gradually increasing cross-sectional area from one end to the other end of the guiding portion. The valve rod member drives the sealing portion to gradually extend into the feed inlet until the feed inlet is blocked.

7. The metering valve according to claim 1, wherein The valve core is provided with an inner cavity for accommodating the valve rod member. A plurality of mounting blocks are circumferentially protruded in the inner cavity. Threads cooperating with the valve rod member are provided on the mounting blocks. One end of the valve rod member is attached to the mounting block, and a feed gap for the material to pass through is formed between the two mounting blocks.

8. The metering valve according to claim 7, wherein, A top block is provided at one end of the inner cavity. One end of the valve rod member abuts against the top block. Press the valve rod member to push the top block so that the valve core moves along the metering cavity away from the seal and blocks the feed inlet.

9. The metering valve according to claim 1, characterized in that, The seal is provided with a mounting hole for the valve rod member to extend into. The valve rod member passes through the mounting hole and is in interference fit with the mounting hole.

10. An aerosol, comprising a container for filling materials, characterized in that, It further includes the metering valve according to any one of claims 1-9. The metering valve is installed on the container by the fixed cover and is sealed with the container.

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