CN212564551U - Valve clack assembly structure and check valve - Google Patents

Abstract

The utility model discloses a valve clack assembly structure and a check valve, wherein the valve clack assembly structure comprises a valve seat, a rocker and a valve clack; the check valve includes a flap assembly structure. One end of the rocker is suitable for being rotatably arranged in the valve body, and the other end of the rocker is used as a free end; the free end is provided with a spherical concave cavity with one end being a contraction opening; one end of the valve clack faces the valve seat, and the other end of the valve clack is connected with a ball head through a neck shaft; the neck journal is worn to establish on first shrink mouth, the bulb rotationally holds in spherical cavity and is restricted in spherical cavity by first shrink mouth, be connected valve clack and rocker when realizing that the bulb is connected with the floating of spherical cavity, then the bulb is at spherical cavity internal rotation in-process, avoided the bulb to be blocked, ensure that the bulb does the rotation or the swing of arbitrary angle in spherical cavity, come from the position of going the adjustment valve clack, even the valve clack is under low pressure environment, the valve clack also can adjust the position by oneself, ensure the sealed butt of valve clack and disk seat, avoid having the leakage problem, improve the leakproofness of the two.

Description

Valve clack assembly structure and check valve

Technical Field

The utility model relates to a technical field of valve, concretely relates to valve clack subassembly structure and check valve.

Background

The swing check valve is also called a check valve or a check valve and is used for preventing media in the pipeline from flowing backwards. The opening and closing piece is opened or closed by the medium flow and force to prevent the medium from flowing backwards. For example, CN206770680U discloses a swing check valve, which comprises a valve body, a valve flap, a valve seat and a rocker. The valve body is provided with a fluid passage which is divided into an inlet section and an outlet section, a valve seat is arranged at the outlet end of the inlet section, one end of a rocker is rotatably arranged on the valve body, and the other end of the rocker is used as a free end; the free end is provided with an annular ball head cavity; a ball head and a connecting shaft fixed on the ball head are convexly arranged on the wall surface of one end of the valve clack; the ball head is arranged in the ball head cavity, the connecting shaft extends out of the ball head cavity, and the end part of the connecting shaft is hooked on the free end through a gasket and a nut which are sleeved on the connecting shaft.

The check valve is arranged on the pipeline, and when no medium exists in the pipeline, the valve clack swings downwards in the inner cavity of the valve body under the gravity of the valve clack and is sealed on the valve seat; when a medium exists in the pipeline, the medium at the inlet section exerts first pressure on the valve clack, and the medium at the outlet section exerts second pressure on the valve clack; on the contrary, if the first pressure is smaller than the second pressure, under the pressure difference and the self-gravity of the valve clack, the valve clack swings downwards along with the rocker, the valve clack is sealed with the valve seat, and the larger the pressure difference is, the better the sealing performance of the valve clack and the valve seat is.

In the opening or closing process of the check valve, the rocker swings freely continuously, so that the gasket is inevitably abutted against the free end, the phenomenon that the ball head rotates in the ball head cavity and is clamped occurs, and the angle of the valve clack cannot be adjusted automatically; especially, in a low-pressure state where the pressure difference between the second pressure and the first pressure is small, when an unsealed area exists between the valve seat and the valve flap, the ball head is clamped in the ball head seat and cannot rotate to adjust the position of the valve flap, so that the sealing performance between the valve flap and the valve seat is poor, and leakage exists.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model discloses the technical problem that will solve lies in the check valve among the prior art under low pressure state, and the valve clack can not adjust the rotation by oneself, leads to valve clack and disk seat leakproofness poor, has the problem of leaking.

Therefore, the utility model provides a valve clack assembly structure, include

A valve seat;

one end of the rocker is suitable for being rotatably arranged in the valve body, and the other end of the rocker is used as a free end; the free end is provided with a spherical concave cavity with one end being a contraction opening;

one end of the valve clack faces the valve seat, and the other end of the valve clack is connected with a ball head through a neck shaft; the neck shaft is arranged on the first contraction opening in a penetrating mode, and the ball head is rotatably accommodated in the spherical concave cavity and limited in the spherical concave cavity by the first contraction opening.

Optionally, in the valve flap assembly structure, the ball head is in clearance fit with the inner wall surface of the spherical cavity.

Optionally, in the valve flap assembly structure, the free end is provided with a mounting hole; the valve clack assembly structure also comprises

The ball socket is detachably fixed in the mounting hole, and the spherical cavity is arranged on the ball socket.

Optionally, in the valve flap assembly structure, the ball seat is screwed in the mounting hole.

Optionally, in the valve flap assembly structure, the outer wall surface of the ball seat is connected to the inner wall surface of the mounting hole through at least one welding point.

Optionally, in the above valve flap assembly structure, the ball cup includes two supports that are symmetrically arranged and detachably connected, and each support has a hemispherical cavity, and the two hemispherical cavities are butted to form the spherical cavity.

Optionally, in the above valve flap assembly structure, a convex edge is radially and outwardly extended from an outer peripheral edge of the ball cup where the first contraction port is located, the convex edge is hooked on a wall surface of a free end adjacent to the convex edge, and a gap is reserved between a side surface of the convex edge facing the valve flap and the valve flap.

Optionally, in the valve flap assembly structure, the free end is further provided with a second contraction port opposite to the first contraction port and communicated with the spherical cavity.

The utility model provides a check valve, include

A valve body having a fluid passage passing through both ends thereof;

the valve clack assembly structure of any one of the above, disposed within the fluid passage; the valve seat is fixed on a radial circumferential wall surface of the fluid channel along the radial direction of the valve body; the valve clack can swing in the fluid passage by the pressure difference of media in the fluid passage to be in a closed state or an open state with the valve seat.

Optionally, in the check valve described above, an extension portion extending along an axial direction of the valve body is provided on an inner wall of the valve body; the fixing seat is arranged on the extension part; one end of the rocker is rotatably arranged on the fixed seat.

The utility model discloses technical scheme has following advantage:

1. the utility model provides a valve clack assembly structure, which comprises a valve seat, a rocker and a valve clack; one end of the rocker is suitable for being rotatably arranged in the valve body, and the other end of the rocker is used as a free end; the free end is provided with a spherical concave cavity with one end being a contraction opening; one end of the valve clack faces the valve seat, and the other end of the valve clack is connected with a ball head through a neck shaft; the neck shaft is arranged on the first contraction opening in a penetrating mode, and the ball head is rotatably contained in the spherical concave cavity and limited in the spherical concave cavity by the first contraction opening. Because the restriction effect of first shrink mouth to the bulb realizes that the bulb is connected with ball cavity's floating and is connected valve clack and rocker simultaneously, then the bulb is at ball cavity internal rotation in-process, has avoided the bulb to be blocked, ensures that the bulb does the rotation or the swing of arbitrary angle in ball cavity, comes the position of going the adjustment valve clack, even the valve clack is under the low pressure environment, the valve clack also can adjust the position by oneself, ensures the sealed butt of valve clack and disk seat, avoids having the leakage problem, improves the leakproofness of the two.

2. The utility model provides a valve clack subassembly structure, the bulb with be clearance fit between the spherical cavity internal face, further ensure the free rotation or the swing of bulb in spherical cavity, realize the adjustment function by oneself.

3. The valve clack assembly structure provided by the utility model also comprises a ball head seat detachably fixed in the mounting hole, and the spherical cavity is arranged on the ball head seat; the ball head seat is arranged so that the ball head can be installed on the ball head seat firstly, and then the ball head seat is installed in the installation hole of the free end, so that the valve clack assembly structure can be assembled conveniently.

4. The ball head seat is matched in the mounting hole through the threads, so that the ball head seat and the mounting hole can be conveniently mounted and dismounted; furthermore, the outer wall surface of the ball cup is connected with the inner wall surface of the mounting hole through at least one welding spot, and the plurality of welding spots enable the ball cup and the mounting hole to form anti-loose connection, so that the connection firmness of the ball cup and the free end is ensured.

5. The utility model provides a check valve is owing to including foretell valve clack subassembly structure to make this check valve be in the low pressure environment, the valve clack still can keep the leakproofness with the disk seat, improves the leakproofness of this check valve.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of the check valve of the present invention in a closed state;

FIG. 2 is a schematic view of the check valve of FIG. 1 in an open state;

fig. 3 is a schematic structural diagram of a valve flap assembly structure provided in embodiment 1 of the present invention;

FIG. 4 is a schematic diagram of the structure of the ball cup of the valve disc assembly structure of FIG. 3;

FIG. 5 is a schematic top view of the ball cup of FIG. 4;

FIG. 6 is an enlarged partial schematic view of the check valve of FIG. 1;

description of reference numerals:

1-a sealing gasket; 2-valve cover; 3-a nut; 4-fixing the base; 5-a pin shaft; 6-a rocker; 7-a valve body; 8-valve seat; 9-a valve flap; 10-a ball cup seat; 11-a stud; 12-neck axis; 13-a first constriction; 14-a second constriction; 15-bulb.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

Example 1

The present embodiment provides a valve flap assembly structure, as shown in fig. 2 and 3, which includes a valve seat 8, a rocker 6 and a valve flap 9. One end of the rocker 6 is suitable for being rotatably arranged in the valve body 7, and the other end of the rocker is used as a free end; a spherical concave cavity with one end presenting a first contraction port 13 is arranged on the free end of the rocker 6; one end of the valve clack 9 faces the valve seat 8, and the other end of the valve clack 9 is connected with a ball head 15 through a neck shaft 12; the neck shaft 12 is arranged on the first contraction opening 13 in a penetrating way, and the ball head 15 is rotatably accommodated in the spherical cavity and is limited in the spherical cavity by the first contraction opening 13.

The valve clack subassembly structure of this structure, because first shrink mouth 13 is to bulb 15 restriction, when realizing that bulb 15 and spherical cavity float and be connected, be connected valve clack 9 and rocker 6, then bulb 15 is at spherical cavity internal rotation in-process, the phenomenon that bulb 15 was blocked has been avoided, ensure that bulb 15 does the rotation or the swing of arbitrary angle in spherical cavity, come from the position of going regulation valve clack 9, even valve clack 9 is under low pressure environment, valve clack 9 also can adjust the position by oneself, ensure valve clack 9 and disk seat 8's sealed butt, avoid having the leakage problem, improve the leakproofness of the two.

Preferably, the ball 15 is in a clearance fit with the inner wall of the spherical cavity, which further ensures that the ball 15 does not get stuck during rotation or swinging of the spherical cavity.

As shown in fig. 2 and 3, the free end is provided with a mounting hole; the ball socket 10 is detachably fixed in the mounting hole, and the spherical cavity is arranged on the ball socket 10. For example, the ball socket 10 is screwed into the mounting hole, and a plurality of welding points are disposed between the outer wall surface of the ball socket 10 and the inner wall surface of the mounting hole, so as to prevent the screw-fitting of the ball socket 10 and the mounting hole from loosening. Preferably, a plurality of welding points are arranged on the same circumference of the outer circumferential wall of the ball cup 10, and the outer circumference of the ball cup 10 is fixed to the inner wall surface of the mounting hole in a circle. Of course, the plurality of welding points may not be arranged on the same circumference.

Or the ball socket 10 can be fixedly connected with the mounting hole by other detachable fixing methods. For example, the ball cup is directly fixed to the free end of the rocker by a bolt and nut assembly or a fastener such as a screw.

For the ball cup 10, as shown in fig. 4 and 5, the ball cup 10 includes two symmetrically disposed and detachably connected supports 101, each support 101 has a hemispherical cavity, and the two hemispherical cavities are connected to form a spherical cavity. In the installation process, the two supports 101 are firstly wrapped on the outer wall surface of the ball head 15, then the installation holes at the free ends of the rocking rods 6 are sleeved outside the two supports 101, the pin holes 16 are respectively formed in the supports, so that a tool for screwing threads can be conveniently embedded into the pin holes, the two supports are synchronously screwed, and the assembly process of the ball head seat 10 and the installation holes is realized.

As shown in figure 4, the spherical cavity is provided with a first contraction opening 13 and a second contraction opening 14, the two contraction openings are opposite and communicated, the first contraction opening 13 is used for the neck shaft 12 to pass through, and the two contraction openings both play a role in limiting the ball head 15 and limit the ball head 15 in the spherical cavity. The second contraction port 14 can also be used for observing the movement condition of the ball head 15 in the spherical cavity in the process of assembling the ball head 15, so that the ball head 15 can freely rotate in the spherical cavity after being assembled. Of course, the spherical cavity may be provided without the second constriction 14 and with only the first constriction 13.

As shown in fig. 4, a convex edge is radially and outwardly extended from the peripheral edge of the ball seat 10 where the first contraction port 13 is located, the convex edge is hooked on the wall surface of the free end adjacent to the convex edge, a gap is reserved between the surface of one side of the convex edge facing the valve flap 9 and the valve flap 9, the reserved gap ensures that the convex edge and the valve flap 9 are always separated in the rotation process of the ball head 15, the rotation of the valve flap 9 cannot be influenced by the convex edge, and the arrangement of the convex edge has a positioning function on the installation position of the ball seat 10 in the installation hole.

As a modified embodiment, the above-mentioned ball socket 10 may also be provided, and a spherical cavity is directly provided at the free end, so as to facilitate the installation of the ball head 15 in the spherical cavity, two fixing portions may also be provided at the free end, the inner cavity of each fixing portion is a hemispherical inner cavity, the two fixing portions are firstly sleeved on the ball head 15, and then are fixedly connected, such as welding or other detachable connections in the prior art, preferably welding.

Example 2

The utility model provides a check valve, as shown in figure 1 and figure 2, include

A valve body 7 having a fluid passage penetrating both ends thereof;

the valve flap assembly structure of any of embodiment 1 disposed within the fluid passage; the valve seat 8 is fixed on a radial circumferential wall surface of the fluid channel along the radial direction of the valve body 7; the valve flap 9 can be pivoted in the fluid channel by the pressure difference of the medium in the fluid channel into a closed or open state with the valve seat.

In the check valve in this embodiment, because the valve flap assembly structure in embodiment 1 is adopted, the valve flap 9 can rotate automatically to adjust the position in a low-pressure environment, the valve flap 9 and the valve seat 8 can keep a sealing state, and the leakage phenomenon is avoided.

As shown in fig. 1, the inner wall of the valve body 7 is provided with an extension portion extending in the axial direction thereof; the device also comprises a fixed seat 4 arranged on the extension part; one end of the rocker 6 is rotatably arranged on the fixed seat 4, so that the free end of the rocker 6 and the valve clack 9 are suspended in the fluid channel. More specifically, be equipped with round pin axle 5 on the fixing base 4, the one end of rocker 6 cup joints on round pin axle 5.

As shown in fig. 1 and 2, a middle cavity channel communicated with the fluid channel is further arranged on the valve body 7, a mounting opening is arranged at the top of the middle cavity channel, the valve cover 2 is fixed on the mounting opening of the valve body 7 through a stud 11 and a nut 3, and a sealing gasket 1 is arranged on the surface of the valve cover 2, which is in contact with the valve body 7, so that the valve cover 2 is hermetically connected with the valve body 7.

The valve seat 8 is installed on the valve body 7 and fixed on the valve body 7 through a girth welding circle, and a first sealing surface and a second sealing surface of a circular ring are respectively welded on the valve seat 8 and the valve clack 9 in a surfacing mode. As shown in fig. 1, when the valve flap 9 and the valve seat 8 are in the closed state, the axes of the valve flap 9 and the ball 15 form an angle a with the axis of the valve body 7, which angle is optionally 3-15 degrees. Such as 5 degrees, 6 degrees, 8 degrees, 10 degrees, 15 degrees, etc. Of course, it may be greater than 15 degrees, or less than 3 degrees. Due to the arrangement of the included angle A, when the check valve is in a closed state, the projection of the sealing surface formed by the valve clack 9 and the valve seat 8 on the vertical surface in the figure 1 is intersected with the axis of the pin shaft 5 in the vertical direction on the vertical surface, the angle of the intersected included angle is the same as that of the included angle A, the projection of the sealing surface on the vertical surface in the figure 1 is positioned on the right side of the axis of the pin shaft 5 in the vertical direction on the vertical surface, and further, it is further ensured that the valve clack 9 and the valve seat 8 are kept in sealing butt joint under the free rotation adjusting effect of the ball head 15.

As shown in fig. 1 and 6, in a free state when no medium is in a pipeline in which the valve body 7 is located, the valve flap 9, the rocker 6 and the fixing seat 4 enable the valve flap 9 to be attached to the valve seat 8 under the action of gravity, and when the valve works, the valve flap 9 is opened under the action that the pressure difference between the left medium and the right medium of the valve flap 9 in fig. 1 is a positive value; when the medium flows back from the right side to the left side in the figure 1, the valve clack 9 is attached to the valve seat 8 to form sealing, so that the backflow of the medium is cut off, the higher the pressure is, the closer the attachment is, and the better the sealing is.

In addition, the ball head 15 can swing freely on the inner spherical surface of the ball head seat 10, so that the valve clack can be well attached to the valve seat when being closed, and sealing is realized. Because all there is manufacturing error in parts manufacturing process alone such as valve body, disk seat, rocker, valve clack, the error accumulation after the equipment is often very big, will make the valve clack can closely laminate with the disk seat and realize sealed, very high to the processing requirement of each part so to lead to whole manufacturing cost than higher. Because the valve clack of the structure can swing freely, the valve clack can absorb and make up processing errors of other parts, the processing requirements of the parts can be reduced, the processing cost is also low, and the structure is simple.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims (10)

1. A valve clack assembly structure is characterized by comprising

A valve seat (8);

one end of the rocker is suitable for being rotatably arranged in the valve body (7), and the other end of the rocker is used as a free end; the free end is provided with a spherical concave cavity with one end presenting a first contraction opening (13);

the valve flap (9) has one end facing the valve seat (8), and the other end of the valve flap (9) is connected with a ball head (15) through a neck shaft (12); the neck shaft (12) is arranged on the first contraction opening (13) in a penetrating way, and the ball head is rotatably accommodated in the spherical cavity and is limited in the spherical cavity by the first contraction opening (13).

2. The valve flap assembly structure of claim 1, wherein the ball (15) is in clearance fit with an inner wall surface of the spherical cavity.

3. The valve flap assembly structure of claim 1 or 2, wherein the free end is provided with a mounting hole; the valve clack assembly structure also comprises

The ball socket (10) is detachably fixed in the mounting hole, and the spherical cavity is arranged on the ball socket (10).

4. The valve flap assembly structure of claim 3, wherein the ball cup (10) is screw-fitted in the mounting hole.

5. The valve flap assembly structure of claim 4, wherein the outer wall surface of the ball seat (10) is connected with the inner wall surface of the mounting hole through at least one welding point.

6. The valve flap assembly structure of claim 3, wherein the ball cup (10) comprises two symmetrically arranged and detachably connected supports, each support having a hemispherical cavity, and the two hemispherical cavities are butted to form the spherical cavity.

7. A valve clack assembly structure according to claim 3, characterized in that the outer peripheral edge of the ball seat (10) where the first contraction port (13) is located is provided with a convex edge extending radially outwards, the convex edge is hooked on the wall surface of the free end adjacent to the convex edge, and a gap is reserved between the surface of one side of the convex edge facing the valve clack (9) and the valve clack (9).

8. A valve flap assembly arrangement according to claim 1 or 2, characterized in that the free end is further provided with a second constriction (14) opposite the first constriction (13) and communicating with the spherical cavity.

9. A check valve, comprising

A valve body (7) having a fluid passage extending through both ends thereof;

the valve flap assembly structure of any one of claims 1-8 disposed within the fluid passage; the valve seat (8) is fixed on a radial circumferential wall surface of the fluid channel along the radial direction of the valve body; the valve flap (9) can be swung in the fluid channel by the pressure difference of the medium in the fluid channel to be in a closed state or an open state with the valve seat.

10. Non-return valve according to claim 9, characterized in that the inner wall of the valve body (7) is provided with an extension extending axially along it; the extension part is provided with a fixed seat (4); one end of the rocker (6) is rotatably arranged on the fixed seat (4).

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