CN212564549U - Built-in inclined check valve - Google Patents

Abstract

The utility model provides a built-in slope check valve belongs to the valve field, including valve body, disk seat, valve rod, valve clack, the disk seat is fixed to be assembled in the opening part that is used for the passageway that the medium got into of valve body and communicates rather than the middle part cavity, and the valve rod forms seal assembly and disk seat clearance fit setting with the valve clack assembly: the disk seat is equipped with the extension corresponding to the valve rod both ends, is equipped with the hinge hole on the extension, the seal assembly pass through the hinge hole articulate in on the disk seat, the both ends of valve rod are in the middle part cavity of valve body in, the utility model discloses the difficult problem that slope check valve rod department leaked has been solved in the development and design of built-in slope check valve, has optimized manufacturing, the processing of valve, promotes valve sealing performance, guarantees the safe operation of valve and equipment facility.

Description

Built-in inclined check valve

Technical Field

The utility model relates to a check valve field, concretely relates to built-in slope check valve of valve rod.

Technical Field

The check valve is mainly used for medium circulation in a pipeline system and preventing the pump and the driving motor from being damaged due to medium backflow. For example, the chinese patent No. CN201910575884.6 provides a check valve with a built-in slow-closing mechanism and a water hammer prevention check valve, in which a valve flap is assembled on a valve rod through a rocker, and the valve rod is assembled on a valve body in a front-back through manner, i.e., the end of the valve rod needs to be rotatably connected to the valve body, and the end of the valve rod is externally arranged on the valve body. And as shown in fig. 1 and 2, the external valve stem structure has an external leakage point at the position where the valve stem is assembled on the valve body: when the valve rod penetrates through the valve body and the valve clack, two external leakage points appear at the sealing positions of the valve body and the valve rod, and meanwhile, the valve body and the valve rod are sealed by the packing and the pressing covers on two sides. On one hand, the sealing form is easy to corrode by media after being used for a long time, so that leakage occurs; on the other hand, along with the long-term motion of valve rod and valve clack, the leakage point in this department also easily appears leaking outward, has the potential safety hazard. In addition, in the sealing mode, the machining and assembling degree of the valve have certain difficulty.

Based on this, the present application is proposed.

Disclosure of Invention

In order to solve the problem, the utility model provides a built-in slope check valve of valve rod, it can avoid the trompil to be used for the assembly of valve rod on the valve body to stop the assembly department between valve rod and the valve body to produce outer leakage point, thereby provide the safety in utilization and the reliability of valve.

In order to achieve the above object, the utility model discloses built-in slope check valve includes valve body, disk seat, valve rod, valve clack, and the disk seat is fixed to be assembled in the opening part that is used for the passageway of medium entering rather than the middle part cavity intercommunication of valve body, valve rod and valve clack assembly near the disk seat assembly form the seal assembly with disk seat clearance fit, the disk seat is equipped with the extension corresponding to the valve rod both ends, be equipped with the hinge hole on the extension, the seal assembly pass through the hinge hole articulate in on the disk seat. Two ends of the valve rod are positioned in the middle cavity of the valve body, and a certain gap is formed between the two ends of the valve rod and the cavity wall of the middle cavity.

The utility model discloses built-in slope check valve carries out redesign to the assembly structure of valve rod on the basis of traditional external slope check valve, through place the valve rod in the middle part cavity of valve body in, subtracts the processing step of seting up the valve rod mounting hole on the valve body, has also saved simultaneously for used part and corresponding assembly process with valve body and valve rod sealing connection. In the structure, the integrated structure of the valve seat, the valve rod and the valve clack has no outer leakage point, so that the problems of outer leakage, difficult processing and assembly and the like of the valve rod of the existing external inclined check valve can be effectively solved, namely, the problem of outer leakage of the valve body and the valve rod is solved, and the valve is easier to process, assemble and maintain, so that more superior durability is provided for the check valve, and the service life of the inclined check valve is prolonged.

For convenient processing and assembly, the utility model discloses further set up as follows: the extension is in the middle cavity of the valve body, which is larger than the diameter of the passage for the medium to enter. So, the valve rod can directly install in the middle part cavity of valve body and not influence the normal flow of medium, and simultaneously, the middle part cavity has bigger volume and space, when will seal subassembly and disk seat and assemble, the assembly space is bigger, the installation of being more convenient for to can reduce the assembly degree of difficulty of valve, make its assembly and maintenance of being convenient for.

For the assembly, the utility model discloses further set up as follows: the top of the valve body is provided with an upper opening, and the length of the valve rod is smaller than the radial maximum width of the upper opening. Through the upper opening, the middle cavity of valve body is directly put into from the upper opening to valve rod, valve clack, need not to enlarge the passageway that the medium flowed out and increase and place the space, simultaneously, also more convenient when the maintenance or change seal assembly. The length of the valve rod is further limited in the structure, the phenomenon that the valve rod collides with the cavity wall of the middle cavity of the valve body when the valve rod is placed into the middle cavity for installation due to the fact that the length of the valve rod is too long is avoided, the service life of the cavity wall in the valve body is prolonged, and therefore the service life of the valve is guaranteed.

The utility model discloses further set up as follows: the valve seat extends towards the middle cavity of the valve body in the flowing direction of the medium. The sealing surface on the valve seat is spaced from the opening by a certain distance and is positioned in the middle cavity of the valve body. On the one hand, above-mentioned structure is favorable to optimizing relative position and the relation of connection between disk seat, valve clack and the valve rod to in the assembly, on the other hand, pivoted slope stroke when it also can shorten the valve clack and open or close improves the utility model discloses the corresponding speed of opening, closing of check valve. Furthermore, the utility model discloses well seal the whole middle part cavity that all is in of subassembly, when the sealed face of disk seat was in the middle part cavity, also be favorable to making the sealed cooperation between valve clack and the disk seat more stable, more reliable.

The utility model discloses further set up as follows: and a counterweight block is arranged on the other side surface of the valve clack, which is opposite to the sealing surface of the valve clack, and the valve can be automatically sealed by the valve clack counterweight design.

The utility model discloses further set up as follows: the valve clack is a single clack.

The utility model discloses further set up as follows: the sealing surface of the valve clack is arranged adjacent to the rocker, namely the valve rod is not arranged in the middle of the whole valve clack (containing a balancing weight) in a penetrating mode, but arranged close to one side of the sealing surface, an eccentric structure is formed, inclined formation can be shortened, and silent opening and closing of the valve are achieved.

In order to facilitate production, maintenance and assembly, the utility model discloses further set up as follows: the valve clack and the rocker are integrally formed.

In order to facilitate production and assembly, the utility model discloses further set up as follows: the counterweight block and the valve clack are connected into a whole through a connecting part.

For the action point that optimizes the balancing weight and act on the valve clack, improve the counter weight effect, the utility model discloses further set up as follows: the connecting part is connected to the middle upper part of the valve clack.

The utility model discloses technical effect as follows:

the utility model discloses with the valve rod built-in, do not have and wear the axle construction, reduce the dew point to this has solved the technical problem that the dew point easily leaked outside the valve rod among the prior art, improves the sealing performance and the safe in utilization of valve. And, this practical letter center disk seat, valve clack and valve rod integral type assembly need not the cooperation bore hole, easy and processing, assembly and maintenance, and structural stability is high, the durability is high simultaneously, can prolong the life of check valve.

And, the utility model discloses but well disk seat valve clack pressure testing alone improves the assembly qualification rate.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic top view of the embodiment of the present invention.

Fig. 3 is the structure diagram of the valve seat, the valve rod and the valve clack according to the embodiment of the present invention.

Fig. 4 is a partially enlarged view of fig. 2.

Reference numerals: 1-valve body, 2-valve seat, 3-valve clack, 4-valve rod, 5-valve cover, 110-entering channel, 120-middle cavity, 130-outflow channel, 210-hinged seat, 220-sealing part, 220 a-valve seat sealing surface, 310-valve clack body, 310 a-valve clack sealing surface, 320-connecting part, 330-balancing weight.

Detailed Description

The specific structure of the built-in tilt check valve of the present invention will be further described with reference to example 1.

Embodiment 1 this embodiment provides a built-in tilt check valve, which comprises a valve body 1, a valve seat 2, a valve rod 4, a valve clack body 310 and a valve cover 5, as shown in fig. 1, the valve body 1 is provided with an inlet passage 110 for medium to enter, an outlet passage 130 for medium to flow out, and the inlet passage 110 is communicated with the outlet passage 130 through a middle cavity 120. The middle cavity 120 is used for providing a space for installing the valve flap body 310 and the valve rod 4, the caliber of the middle cavity is often larger than the calibers of the inlet channel 110 and the outlet channel 130, and when the closing assembly is assembled with the valve seat 2, the assembly space is larger and the valve is more convenient to install, so that the assembly difficulty of the valve is reduced, and the valve is convenient to assemble and maintain. Meanwhile, taking the Y direction in the coordinate shown in fig. 3 as an upward direction, the top of the valve body 1 is provided with an opening, and the bonnet 5 is detachably fitted to the opening at the top of the valve body 1 by a coupling member such as a nut, a bolt, or the like. In view of sealing, a sealing ring is arranged at the covering position between the valve cover 5 and the valve body 1 for sealing and covering the valve cover 5 and the valve body 1. For ease of assembly and replacement for maintenance, a preferred embodiment is to make the length of the valve stem 4 smaller than the maximum radial width of the upper opening through which the valve stem 4, the flapper body 310 can be placed directly into the middle chamber 120 of the valve body 1, greatly facilitating the installation of the valve stem 4, the valve seat 2, and the flapper 3.

Referring to fig. 3 and 4, the valve seat 2 is an annular component, and includes a mounting portion, a sealing portion 220 and a hinge seat 210, which are connected in sequence, the mounting portion is fixedly mounted on a mounting groove at an opening of the valve body 1, through which a medium enters the mounting groove and the middle cavity 120 of the valve body is communicated, and the mounting portion and the mounting groove are connected in a sealing manner through a sealing ring. The sealing portion 220 and the hinge seat 210 are formed by extending the mounting portion toward the middle chamber 120, wherein the sealing portion 220 is an extension of the mounting portion in the X direction, and a ring of tapered valve seat sealing surface 200a is disposed inside the sealing portion. Since the sealing portion 220 is extended toward the middle chamber 120, the valve seat sealing surface 200a is spaced apart from the opening and is located in the middle chamber 120 of the valve body 1. The hinge portion may be only the sealing portion 220 extending corresponding to the two ends of the valve rod 4, the hinge base 210 is provided with a hinge hole, the end portion of the valve rod 4 is hinged to the hinge hole, the end portion of the valve rod 4 can penetrate through the hinge hole to be opposite to the cavity wall of the middle cavity 120 of the valve body 1 at a spacing, and the spacing is usually required to be not less than 3 mm.

The flap body 310 is a curved arc-shaped member whose edge is also provided with a conical flap sealing surface 310 a. The middle part of the valve rod 4 passes through the valve clack body 310 or the part of the valve clack body 310, and is assembled with the valve clack body 310 at the accessory of the valve seat 2 to form a sealing component to be matched with the valve seat 2, namely, in a natural state, the valve clack sealing surface 310a is tightly matched and sealed with the valve seat sealing surface 200a, and when a medium passes through, the valve clack body 310 enables the valve clack sealing surface 310a to be separated from the valve seat sealing surface 200a in a rotating mode. Because the valve rod 4 directly passes through the valve clack body 310, the valve rod 4 and the valve clack body 310 are arranged adjacently, and the valve seat sealing surface 200a arranged close to the valve clack body 310 is combined, the structure reduces the inclined displacement stroke of the valve clack body 310, improves the response speed on one hand, reduces the sound generated when the valve clack body 310 is opened and closed, and realizes silent opening and closing.

In another preferred embodiment, the valve flap body 310 and the valve rod 4 may be integrally cast, so that the valve rod 4 and the valve flap body 310 are not required to be assembled again, and the integrity between the valve rod 4 and the valve flap body 310 can be enhanced, and the structural damage to the valve flap body 310 caused by the perforation of the valve rod 4 from the valve flap body 310 can be avoided.

Example 2 this example differs from example 1 in that: the other side surface of the valve clack body 310, which is opposite to the sealing surface of the valve clack body 310, is provided with a balancing weight 330, and the valve can be automatically sealed through the counterweight design of the valve clack 3.

In a preferred embodiment, the valve flap body 310, the valve rod 4 and the weight block 330 may be integrally cast and processed, so that the valve rod 4, the valve flap body 310 and the weight block 330 are not assembled again, the processing steps are greatly saved, integrity between the valve rod 4 and the valve flap body 310 can be enhanced, and structural damage to the valve flap body 310 caused by punching the valve rod 4 from the valve flap body 310 can be avoided.

On the basis of the present embodiment, a connection portion 320 may be further provided, the connection portion 320 is used to connect the weight 330 and the valve flap body 310 into a whole at a certain distance, so as to provide the pressing effect of the weight 330 on the valve flap body 310.

Of course, in a preferred embodiment, the valve flap body 310, the valve rod 4, the connecting portion 320 and the weight 330 may be integrally cast.

In the above embodiment, the connecting portions 320 are symmetrically disposed on two connections between the valve flap body 310 and the weight 330, and the two connecting structures are hollowed out.

In the above embodiment, the valve flap 3 is a single flap.

To sum up, the utility model provides a place built-in slope check valve in valve body 1 in valve rod 4, it is through built-in with valve rod 4 to remove from and offer mounting hole and corresponding seal structure on valve body 1, banned the existence of exposing the point from the root, because the external intrinsic outer dew point of valve rod 4 and the leakage problem that outer dew point exists in long-term use among the prior art is solved with this, ensure the safety in utilization of check valve.

Claims (10)

1. The utility model provides a built-in slope check valve, includes valve body, disk seat, valve rod, valve clack, and the disk seat is fixed to be assembled in the opening part that is used for the passageway of medium entering and its middle part cavity intercommunication of valve body, and the valve rod forms seal assembly and disk seat clearance fit setting, its characterized in that with the valve clack assembly: the valve seat is provided with extending parts corresponding to two ends of the valve rod, hinge holes are formed in the extending parts, and the sealing assembly is hinged to the valve seat through the hinge holes; two ends of the valve rod are positioned in the middle cavity of the valve body, and a certain gap is formed between the two ends of the valve rod and the cavity wall of the middle cavity.

2. The built-in tilt check valve of claim 1, wherein: the extension is in the middle cavity of the valve body, which is larger than the diameter of the passage for the medium to enter.

3. The built-in tilt check valve according to claim 1 or 2, wherein: the top of the valve body is provided with an upper opening, and the length of the valve rod is smaller than the radial maximum width of the upper opening.

4. The built-in tilt check valve of claim 3, wherein: the valve seat extends towards the middle cavity of the valve body in the flowing direction of the medium, so that the sealing surface on the valve seat is spaced from the opening by a certain distance and is positioned in the middle cavity of the valve body.

5. The built-in tilt check valve of claim 1, wherein: the other side surface of the valve clack arranged opposite to the sealing surface of the valve clack is provided with a balancing weight.

6. The built-in tilt check valve of claim 5, wherein: the valve clack is a single clack.

7. The built-in tilt check valve of claim 4 or 5, wherein: the sealing surface of the valve clack is arranged adjacent to the rocker.

8. The built-in tilt check valve of claim 7, wherein: the valve clack and the rocker are integrally formed.

9. The built-in tilt check valve of claim 5, wherein: the counterweight block and the valve clack are connected into a whole through a connecting part.

10. The built-in tilt check valve of claim 9, wherein: the connecting part is connected to the middle upper part of the valve clack.

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