CN220900863U

CN220900863U - Check valve

Info

Publication number: CN220900863U
Application number: CN202322295102.8U
Authority: CN
Inventors: 曹广辉; 刘起源
Original assignee: Tolyy Optronics Co ltd
Current assignee: Tolyy Optronics Co ltd
Priority date: 2023-08-25
Filing date: 2023-08-25
Publication date: 2024-05-07
Anticipated expiration: 2033-08-25

Abstract

The application relates to the technical field of valves, in particular to a check valve. The check valve comprises a valve body, a cavity is arranged in the valve body, the valve body is provided with a feed inlet and a discharge outlet, the cavity comprises a feed cavity and a discharge cavity which are communicated, the inner diameter of the feed cavity is smaller than that of the discharge cavity, a step is formed in the cavity, a check component is arranged in the cavity and comprises a valve core, an elastic piece and a positioning piece, the positioning piece is connected with the inner wall of the discharge cavity, one end of the valve core is in sealing fit with the step, and the elastic piece is arranged between the valve core and the positioning piece. The application can save a great deal of time cost and glue cost, improve the yield, reduce the maintenance cost, ensure the cleanliness of the glue, avoid the pollution of the glue and equipment as much as possible, and reduce the procedures of cleaning the glue and the equipment.

Description

Check valve

Technical Field

The application relates to the technical field of valves, in particular to a check valve.

Background

The glue filling machine is an automatic machine which is specially used for controlling fluid and coating the fluid on the surface of a product, when the glue filling machine performs a glue outlet action, the glue needs to flow out after passing through a check valve, and the check valve is a valve body which can only flow along a water inlet and cannot flow back a water outlet medium. Check valves, also known as check valves or check valves, are used in hydraulic systems to prevent reverse flow of oil flow or in pneumatic systems to prevent reverse flow of compressed air. The check valve has two kinds of straight-through type and right angle type, and the straight-through check valve is installed on the pipeline with threaded connection. The right-angle check valve has three forms of threaded connection, plate connection and flange connection.

The silicon-based optical adhesive is a special adhesive for bonding transparent optical elements, has the characteristics of no color, transparency as high as more than 98%, good bonding strength, small curing shrinkage and yellowing resistance, and can be cured at normal temperature or medium temperature. When the silicon-based optical cement is filled, the prior check valve has overlarge volume and large aperture, and various pipe joints with converted diameters are needed to change the diameter in the installation process so as to meet the installation requirement. Part of check valves adopt brass material, and in the use, brass material drops brass fragments easily because of the atress friction to lead to the product bad. Some check valves adopt stainless steel, and although stainless steel can satisfy the volume requirement, also can avoid dropping the problem of piece, but current stainless steel check valve can appear the sealing washer wearing and tearing after using one to six months and fall the piece, pollute the problem of glue, and the sealing washer is sealed not tight can lead to out the glue volume inaccurate. In addition, the check valve with the sealing ring occasionally has the phenomenon of blocking, and when the pressure in the check valve is too high, the sealing ring is easy to break, deform or undercut. When the sealing washer goes wrong, need often change the check valve, cause the waste of glue easily when changing, and change in-process pipeline and glue and all receive the pollution easily, the silica-based optical cement of pollution is difficult to reuse, consequently can cause the waste of a large amount of glue.

Disclosure of utility model

Based on the above, it is necessary to provide a check valve against the pollution and waste of glue caused by the sealing ring.

According to one aspect of the application, a check valve is provided, which comprises a valve body, wherein a cavity is formed in the valve body, the valve body is provided with a feed inlet and a discharge outlet, the cavity comprises a feed cavity and a discharge cavity which are communicated, the inner diameter of the feed cavity is smaller than that of the discharge cavity, a step is formed in the cavity, a check component is arranged in the cavity, the check component comprises a valve core, an elastic piece and a positioning piece, the positioning piece is connected with the inner wall of the discharge cavity, one end of the valve core is in sealing fit with the step, and the elastic piece is arranged between the valve core and the positioning piece.

In one embodiment, the positioning piece is detachably connected with the valve body, and a gap for glue to pass through is formed between the positioning piece and the valve body.

In one embodiment, the positioning piece is in threaded connection with the inner wall of the discharging cavity.

In one embodiment, the valve core comprises a sealing block and a positioning rod, the sealing block is connected with the positioning rod, the diameter of one end, close to the feed inlet, of the sealing block is smaller than that of one end, close to the discharge outlet, of the sealing block, an inclined surface inclined relative to the central axis of the valve body is arranged on the step, and the inclined surface is attached to the outer wall of the valve core.

In one embodiment, the positioning piece is provided with a positioning hole, the positioning hole penetrates through the positioning piece, the positioning hole is used for the positioning rod to penetrate through, and the diameter of the positioning hole is larger than that of the positioning rod.

In one embodiment, one end of the elastic member is in contact with the sealing block, and the other end is in contact with the positioning member, and the elastic member is configured to provide an elastic force for sealing the valve element to the valve element when the valve element is separated from the step.

In one embodiment, the surface of the sealing block near one end of the feed port is a plane.

In one embodiment, the valve core comprises a sealing ball and a limiting rod, the limiting rod is connected with the sealing ball, the sealing ball is in sealing fit with the step, one end of the elastic piece is in contact with the sealing ball, and the other end of the elastic piece is in contact with the positioning piece.

In one embodiment, the positioning piece comprises a center block and a connecting block, the center block is connected with the connecting block, the connecting block is provided with a plurality of blocks, the plurality of blocks are arranged around the central axis of the valve body at intervals and are in threaded connection with the inner wall of the discharging cavity, and a discharging channel is formed between the plurality of blocks and the inner wall of the discharging cavity.

In one embodiment, the valve body and the check assembly are both stainless steel.

According to the application, the positioning piece is in threaded connection with the valve body, the positioning piece is enabled to extrude the elastic piece by adjusting the position of the positioning piece, when glue flows from the feeding hole to the discharging hole, the glue drives the sealing block and the positioning rod to move towards one end of the discharging hole, the sealing block extrudes the elastic piece, and the elastic piece contracts. When the equipment booster pump stops conveying glue with pressure, the pressure born by the sealing block is reduced until the pressure disappears, the elastic piece resets, the elastic piece pushes the sealing block and the locating rod to reset, the sealing block is attached to the inclined plane on the step, sealing is achieved, and therefore backflow of the glue in the discharging cavity can be avoided as much as possible. The check valve provided by the application has the advantages that the setting of the sealing ring is canceled, so that the problem that the sealing ring falls scraps to pollute glue is avoided, the sealing ring is not required to be replaced and maintained, the glue is not polluted when the sealing ring is replaced, and the procedures of cleaning colloid and equipment are omitted; and the pipeline is not blocked due to the breakage of the sealing ring, or the accuracy of the next glue outlet amount is not affected due to the backflow of the glue amount caused by the poor sealing. The application can also save a great deal of time cost and glue cost, improve the yield and reduce the maintenance cost.

Drawings

Fig. 1 is a schematic view showing the overall structure of a check valve according to a first embodiment of the present application.

Fig. 2 is a sectional view showing an internal structure of a check valve according to a first embodiment of the present application.

FIG. 3 is a schematic diagram of a suspension loop assembly according to an embodiment of the application.

Fig. 4 is a schematic structural view of a positioning member according to a first embodiment of the present application.

Fig. 5 is a sectional view showing the internal structure of a check valve according to a second embodiment of the present application.

Fig. 6 is a schematic structural diagram of a positioning member according to a third embodiment of the present application.

Reference numerals illustrate:

10. A valve body; 100. a cavity; 110. a feed inlet; 120. a discharge port; 130. a feed chamber; 140. a discharge cavity; 150. a first thread; 160. a second thread; 20. a non-return assembly; 210. a valve core; 211. a sealing block; 212. a positioning rod; 213. a sealing ball; 214. a limit rod; 220. an elastic member; 230. a positioning piece; 231. positioning holes; 232. a center block; 233. a connecting block; 234. a central bore; 235. a discharge channel; 240. a discharge chute; 250. a step; 251. and (5) an inclined plane.

Detailed Description

In order that the above objects, features and advantages of the application will be readily understood, a more particular description of the application will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The present application may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the application, whereby the application is not limited to the specific embodiments disclosed below.

In the description of the present application, it should be understood that, if any, these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., are used herein with respect to the orientation or positional relationship shown in the drawings, these terms refer to the orientation or positional relationship for convenience of description and simplicity of description only, and do not indicate or imply that the apparatus or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the application.

Furthermore, the terms "first," "second," and the like, if any, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the terms "plurality" and "a plurality" if any, mean at least two, such as two, three, etc., unless specifically defined otherwise.

In the present application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly. For example, the two parts can be fixedly connected, detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present application, unless expressly stated or limited otherwise, the meaning of a first feature being "on" or "off" a second feature, and the like, is that the first and second features are either in direct contact or in indirect contact through an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein, if any, are for descriptive purposes only and do not represent a unique embodiment.

The silicon-based optical adhesive is a special adhesive for bonding transparent optical elements, has the characteristics of no color, transparency up to more than 98%, good bonding strength, small curing shrinkage and yellowing resistance, and can be cured at normal temperature or medium temperature. When the silicon-based optical cement is filled, the prior check valve has overlarge volume and large aperture, and various pipe joints with converted diameters are needed to change the diameter in the installation process so as to meet the installation requirement. Part of check valves adopt brass material, and in the use, brass material drops brass fragments easily because of the atress friction to lead to the product bad. Some check valves adopt stainless steel, and although stainless steel can satisfy the volume requirement, also can avoid dropping the problem of piece, but current stainless steel check valve can appear the sealing washer wearing and tearing after using one to six months and fall the piece, pollute the problem of glue, and the sealing washer is sealed not tight can lead to out the glue volume inaccurate. In addition, the check valve with the sealing ring occasionally has the phenomenon of blocking, and when the pressure in the check valve is too high, the sealing ring is easy to break, deform or undercut.

To sum up, in the use, when the sealing washer goes wrong, need often change the check valve, cause the waste of glue easily when changing, and change in-process pipeline and glue and all receive the pollution easily, the silica-based optical cement of pollution is difficult to reuse, consequently can cause the waste of a large amount of glue.

Therefore, the check valve is used for silicon-based optical cement, and the check valve provided by the application is internally provided with a sealing ring, so that the influence of the sealing ring on the cement during use can be avoided. The structure of the check valve in the present application is described below, and this embodiment is only used as an example and does not limit the technical scope of the present application. It will be appreciated that in other embodiments, the check valve is not limited to use in a glue dispenser, is not limited to use with silicon-based optical glue, and may be used with other liquid or gas delivery devices, and is not limited in this regard.

Referring to fig. 1 and 2, fig. 1 shows a schematic structural diagram of a stop return valve according to an embodiment of the present application, and the check valve provided by an embodiment of the present application includes a valve body 10, a cavity 100 is opened in the valve body 10, and the cavity 100 penetrates through the valve body 10 along an axial direction of the valve body 10. In this embodiment, the valve body 10 is made of stainless steel, preferably 304 stainless steel, and in other embodiments, the material of the valve body 10 may be selected according to the material in the cavity 100, which is not limited herein. The valve body 10 is provided with a feed inlet 110 and a discharge outlet 120, the feed inlet 110 is arranged at one end of the valve body 10, the discharge outlet is arranged at one end opposite to the feed inlet 110, and glue enters the cavity 100 from the feed inlet 110, flows through the cavity 100 and then flows out from the discharge outlet 120. The cavity 100 includes a feeding cavity 130 and a discharging cavity 140, the feeding cavity 130 and the discharging cavity 140 are communicated, the feeding cavity 130 and the discharging cavity 140 are both cylindrical cavities, and the diameter of the feeding cavity 130 is smaller than that of the discharging cavity 140, so that a step 250 is formed between the feeding cavity 130 and the discharging cavity 140. In this embodiment, the diameter of the feeding chamber 130 is 8mm, and the diameter of the discharging chamber 140 is 15mm, so that the requirements of small aperture and small volume are satisfied, and the installation requirement can be satisfied. It will be appreciated that in other embodiments, the diameters of the feed chamber 130 and the discharge chamber 140 may be set according to installation requirements.

Referring to fig. 2, a first thread 150 is provided on an outer wall of the valve body 10 at an end far from the discharge port 120, and the first thread 150 is used for connecting a feeding pipe (not shown in the figure); the inner wall of the valve body 10 at the end far away from the feed inlet 110 is provided with a second thread 160, and the second thread 160 is used for connecting a feed pipe (not shown in the figure). By providing the first threads 150 and the second threads 160, the disassembly and assembly of the feed pipe and the discharge pipe is facilitated.

Referring to fig. 2 and 3, the cavity 100 is provided with the check assembly 20, where the check assembly 20 includes a valve core 210, an elastic member 220 and a positioning member 230, and the valve core 210, the elastic member 220 and the positioning member 230 are made of stainless steel, where the valve core 210 is preferably made of 420 stainless steel, and the positioning member 230 and the elastic member 220 are preferably made of 304 stainless steel, and in other embodiments, the materials of the valve core 210 and the positioning member 230 may be selected according to the substances in the cavity 100, which is not limited herein. The positioning member 230 is specifically a positioning block in this embodiment, an external thread is disposed on an outer wall of the positioning member 230, and the external thread is in threaded engagement with the second thread 160 on the inner wall of the discharge cavity 140, so that the position of the positioning member 230 in the discharge cavity 140 can be conveniently adjusted by rotating the positioning member 230. A discharge chute 240 is arranged between the positioning member 230 and the inner wall of the discharge cavity 140, and the discharge chute 240 is used for passing glue.

Referring to fig. 3 and 4, a positioning hole 231 is formed in the positioning member 230, and the positioning hole 231 penetrates the positioning member 230 along the thickness direction of the positioning block itself. The valve core 210 comprises a sealing block 211 and a positioning rod 212, wherein the sealing block 211 is fixedly connected with the positioning rod 212, and the positioning rod 212 is fixed on the end face of the sealing block 211 facing the discharge hole 120. The positioning rod 212 is a cylindrical rod in this embodiment, and the positioning rod 212 is disposed in the positioning hole 231 and penetrates the positioning member 230. The sealing block 211 is in a truncated cone shape in the embodiment, the diameter of one end of the sealing block 211 close to the discharge hole 120 is larger than the diameter of one end of the sealing block 211 close to the feed hole 110, the end face of the sealing block 211 facing the feed hole 110 is a plane, an inclined plane 251 is arranged on a step 250 of the sealing block 211, the inclined plane 251 is attached to the outer side wall of the sealing block 211, and the outer side wall of the sealing block 211 is in sealing fit with the step 250. The elastic member 220 is specifically a spring in this embodiment, one end of the elastic member 220 contacts with the end surface of the positioning member 230, and the other end abuts against the end surface of the sealing block 211.

Referring to fig. 3, by rotating the positioning member 230 within the discharge chamber 140, the positioning member 230 is pressed against the elastic member 220, and the elastic member 220 is compressed by applying pressure to the elastic member 220. Glue enters the cavity 100 from the feed inlet 110, flows to the discharge outlet 120, applies reverse pressure to the sealing block 211 and the elastic piece 220, and moves the sealing block 211 and the positioning rod 212 towards one side of the discharge outlet 120, so that a gap for the glue to pass through is formed between the sealing block 211 and the step 250. When the device booster pump stops delivering the glue with pressure, the pressure applied to the sealing block is reduced until the pressure disappears, the elastic piece 220 is reset, the elastic piece 220 applies a force to the sealing block 211 towards one side of the feed inlet 110, the sealing block 211 and the positioning rod 212 move towards one side of the feed inlet 110, and the glue is extruded by the sealing block 211 due to the fact that the end face of the sealing block 211 towards the feed inlet 110 is a plane, so that the rebound speed of the sealing block 211 can be guaranteed. When the elastic piece 220 is rebounded to the initial state, the elastic piece 220 abuts against the tight sealing block 211, so that the sealing block 211 abuts against the inclined surface 251 on the step 250, the sealing effect is achieved, and further the glue in the discharge cavity 140 can be prevented from flowing back into the feeding cavity 130 as much as possible. Because the sealing block 211 is in a truncated cone shape, the sealing block 211 can enable the self reciprocating motion to be more smooth and unobstructed.

Referring to fig. 3, the problem of glue pollution caused by abrasion and chip drop of the sealing ring after one to six months of use can result in inaccurate glue output if the sealing ring is not tightly sealed. In addition, the check valve with the sealing ring occasionally has the phenomenon of blocking, and when the pressure in the check valve is too high, the sealing ring is easy to break, deform or undercut. Therefore, in the use, when the sealing washer goes wrong, need often change the check valve, cause the waste of glue easily when changing, and change in-process pipeline and glue and all receive the pollution easily, the silica-based optical cement of pollution is difficult to reuse, can cause the waste of a large amount of glue. Therefore, the elastic piece 220 is abutted against the sealing block 211, so that the sealing block 211 is attached to the step 250, and the sealing effect between the sealing block 211 and the valve body 10 is realized. The application cancels the arrangement of the sealing ring, so that the problem that the sealing ring falls scraps to pollute glue is avoided, the sealing ring is not required to be replaced and maintained, the glue is not polluted when the sealing ring is replaced, and the working procedures of cleaning colloid and equipment are omitted; and the pipeline is not blocked due to the breakage of the sealing ring, or the accuracy of the next glue outlet amount is not affected due to the backflow of the glue amount caused by the poor sealing. The application can also save a great deal of time cost and glue cost, improve the yield and reduce the maintenance cost.

Referring to fig. 5, fig. 5 shows a schematic structural diagram of a stop return valve according to another embodiment of the present application, which is different from the previous embodiment in that the valve core 210 includes a sealing ball 213 and a limiting rod 214, the limiting rod 214 is fixedly connected with the sealing ball 213, the limiting rod 214 penetrates through a positioning hole 231, and an outer wall of the sealing ball 213 is attached to an inclined plane 251 on a step 250 to realize sealing fit. It will be appreciated that in other embodiments, the sealing ball 213 may be a hemisphere, the outer wall of which conforms to the inclined surface 251 to effect a seal.

Referring to fig. 6, fig. 6 shows a schematic structural diagram of a stop return valve according to another embodiment of the present application, which is different from the previous embodiment in that the positioning member 230 includes a central block 232 and a connection block 233, the central block 232 and the connection block 233 are integrally formed, a central hole 234 is formed in the central block 232, the central hole 234 axially penetrates the central block 232, the central hole 234 is used for passing through the positioning rod 212, the connection block 233 has three blocks in this embodiment, a third thread is disposed on a side wall of the connection block 233 far from one end of the central block 232, the third thread is in threaded fit with the discharge cavity 140, three discharge channels 235 are formed between the three connection blocks 233 and an inner wall of the discharge cavity 140, and the three discharge channels 235 can reduce blocking during glue discharge, so as to facilitate glue discharge.

The implementation principle of the embodiment of the application is as follows: the positioning piece 230 is screwed into the discharging cavity 140 by a tool, so that the positioning piece 230 presses the elastic piece 220, the elastic piece 220 applies force to the sealing ball 213, and the sealing ball 213 is attached to the inclined surface 251 of the step 250, so that sealing is realized. When the device pressurization pump conveys glue from the feed inlet 110 to the discharge outlet 120, the glue with pressure pushes the sealing ball 213 and the limiting rod 214 to move to one side of the discharge outlet 120, so that a gap is formed between the sealing ball 213 and the inclined surface 251 of the step 250, the glue passes through the gap, the sealing ball 213 presses the elastic member 220, and the elastic member 220 contracts. When the device booster pump stops delivering the glue with pressure, the elastic element 220 resets, the elastic element 220 drives the sealing ball 213 and the limiting rod 214 to reset, so that the sealing ball 213 is attached to the inclined plane 251, sealing is realized, and the glue in the discharge cavity 140 can flow back as much as possible. The design without the sealing ring can ensure the cleanliness of the glue, prolong the service life of the check valve, avoid the waste of a large amount of glue as much as possible and save a large amount of time and cost.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.

Claims

1. The utility model provides a check valve, its characterized in that, includes the valve body, the cavity has been seted up in the valve body, the valve body has feed inlet and discharge gate, the cavity is including the feed cavity and the discharge cavity that are linked together, the internal diameter in feed cavity is less than the discharge cavity for form the step in the cavity, be equipped with the check subassembly in the cavity, the check subassembly includes case, elastic component and setting element, the setting element with the inner wall in discharge cavity links to each other, the one end sealing fit of case in the step, the elastic component sets up the case with between the setting element.

2. The check valve of claim 1 wherein said retainer is removably connected to said valve body with a gap therebetween for the passage of glue.

3. The check valve of claim 1 wherein said retainer is threadably coupled to an inner wall of said discharge chamber.

4. The check valve of claim 1, wherein the valve core comprises a sealing block and a positioning rod, the sealing block is connected with the positioning rod, the diameter of one end of the sealing block, which is close to the feed inlet, is smaller than the diameter of one end, which is close to the discharge outlet, of the sealing block, an inclined surface which is inclined relative to the central axis of the valve body is arranged on the step, and the inclined surface is attached to the outer wall of the valve core.

5. The check valve of claim 4, wherein the positioning member has a positioning hole formed therein, the positioning hole extending through the positioning member, the positioning hole being configured to allow the positioning rod to pass therethrough, the positioning hole having a diameter greater than a diameter of the positioning rod.

6. The check valve of claim 4, wherein the resilient member has one end in contact with the sealing block and the other end in contact with the positioning member, the resilient member being configured to provide a resilient force to sealingly engage the valve element to the valve element when the valve element is disengaged from the land.

7. The check valve of claim 4 wherein the face of said sealing block adjacent to one end of said feed port is planar.

8. The check valve of claim 1, wherein the valve core includes a sealing ball and a retainer rod, the retainer rod is connected to the sealing ball, the sealing ball is in sealing engagement with the step, one end of the elastic member is in contact with the sealing ball, and the other end is in contact with the positioning member.

9. The check valve of claim 1, wherein the positioning member comprises a central block and a connecting block, the central block is connected with the connecting block, the connecting block is provided with a plurality of blocks, the plurality of blocks are arranged at intervals around the central axis of the valve body and are in threaded connection with the inner wall of the discharge cavity, and a discharge channel is formed between the plurality of blocks and the inner wall of the discharge cavity.

10. The check valve of claim 1, wherein the valve body and the check assembly are each stainless steel.