CN213117560U

CN213117560U - Valve rod connector, connecting structure of valve rod and gate plate valve

Info

Publication number: CN213117560U
Application number: CN202021730855.7U
Authority: CN
Inventors: 崔俊峰
Original assignee: Shanghai Langsheng Petroleum Equipment Co ltd
Current assignee: Shanghai Langsheng Petroleum Equipment Co ltd
Priority date: 2020-08-18
Filing date: 2020-08-18
Publication date: 2021-05-04
Anticipated expiration: 2030-08-18

Abstract

The utility model provides a valve rod joint, a connecting structure of a valve rod and a flashboard valve, wherein the valve rod joint comprises a hollow columnar component, the inner wall of one end of the hollow columnar component is provided with an internal thread for connecting the valve rod, and the other end of the hollow columnar component is provided with a lug structure for clamping; the connecting structure of the valve rod and the flashboard comprises a valve rod joint, the valve rod joint is connected with the valve rod through internal threads, and the valve rod joint is connected with the flashboard through a bump structure; one end of the flashboard is provided with a clamping groove structure for clamping, and the shape and the size of the clamping groove structure are matched with those of the bump structure. The utility model improves the connection mode of the valve rod and the flashboard by adding the valve rod joint, thereby reducing the switch torque of the flashboard valve, facilitating the manual opening and improving the sensitivity of the switch; simple structure, the part is convenient for process, and the cost is lower.

Description

Valve rod connector, connecting structure of valve rod and gate plate valve

Technical Field

The utility model relates to an industrial valve field specifically, relates to a connection structure and slide valve of valve rod joint, valve rod and flashboard.

Background

The gate valve is one of the most commonly used shut-off valves, and is mainly used for connecting or shutting off a medium in a pipeline and is not used for regulating the flow of the medium. The applied pressure, temperature and diameter range is large, especially applied to medium and large diameter pipelines. Through trapezoidal threaded connection between the valve rod of traditional slide valve and the flashboard, as shown in fig. 4, and fit clearance is less between valve rod and flashboard, and the screw thread stroke is longer, makes the flashboard remove the in-process and receives the vice restraint of screw thread, has increased slide valve switching torque, and even alone can't manually open when serious, can't satisfy the market demand.

SUMMERY OF THE UTILITY MODEL

To the defect among the prior art, the utility model aims at providing a connection structure and slide valve of valve rod joint, valve rod and flashboard.

According to the utility model discloses a first aspect provides a valve rod connector, including cavity column part, the inner wall of cavity column part one end is equipped with the internal thread that is used for connecting the valve rod, the cavity column part other end is equipped with the lug structure that is used for the joint.

Preferably, the internal thread is a trapezoidal thread.

Preferably, the bump structure is composed of an annular groove and a columnar protrusion, wherein the columnar protrusion is located at one end of the hollow columnar member, the annular groove is arranged on the outer wall of the hollow columnar member, the annular groove is arranged between the columnar protrusion and the hollow columnar member, and the interiors of the columnar protrusion, the annular groove and the hollow columnar member are communicated.

Preferably, the outer diameter of the columnar projection is larger than the outer diameter of the hollow columnar member; the outer diameter of the annular groove is smaller than the outer diameter of the hollow cylindrical member.

The utility model discloses a second aspect provides a connection structure of valve rod and flashboard, including foretell valve rod joint, valve rod joint passes through the internal thread with the valve rod is connected, valve rod joint passes through the lug structure with the flashboard is connected.

Preferably, the one end of flashboard is equipped with the draw-in groove structure that is used for the joint, the shape of draw-in groove structure, size with the lug structure phase-match.

Preferably, the clamping groove structure is composed of a cylindrical socket groove and an annular convex edge, wherein one end of the flashboard is provided with the cylindrical socket groove which is concave inwards, and the shape and size of the cylindrical socket groove are matched with those of the cylindrical protrusion; the socket end of the columnar socket slot is provided with an annular convex edge extending inwards from the inner wall of the columnar socket slot, and the shape and size of the annular convex edge are matched with the annular groove.

Preferably, one end of the valve rod is provided with an external thread.

Preferably, the external thread is a trapezoidal thread.

The utility model discloses the third aspect provides a slide valve, including the connection structure of foretell valve rod and flashboard.

Compared with the prior art, the utility model discloses at least one kind's beneficial effect as follows has:

the above structure of the utility model, through developing a simple structure's valve rod joint for connect valve rod and flashboard, this valve rod joint is connected with the valve rod through setting up in the screw thread of cavity column part one end inner wall, and passes through the joint through the lug structure that sets up in cavity column part one end tip and be connected with the flashboard. When using, drive the valve rod joint through the rotary valve pole and remove to make the valve rod joint pass through the lug structure and drive the flashboard and remove, realize that the slide valve opens and closes, make the flashboard be in the floating condition through above-mentioned connected mode, therefore make slide valve switch moment of torsion less, thereby reduced slide valve switch moment of torsion, improved the valve rod and the flashboard lug connection that traditional slide valve adopted and had the great problem of moment of torsion.

The gate valve of the utility model improves the connection mode of the valve rod and the gate plate by adding the valve rod joint, thereby reducing the switch torque of the gate valve, facilitating the manual opening and improving the sensitivity of the switch; simple structure, the part is convenient for process, and the cost is lower.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

FIG. 1 is a schematic structural view of a valve stem fitting according to a preferred embodiment of the present invention;

fig. 2 is a schematic view of a connection structure of a valve stem and a shutter according to a preferred embodiment of the present invention;

fig. 3 is a schematic structural view of a shutter according to a preferred embodiment of the present invention;

FIG. 4 is a schematic view of a prior art valve stem to gate connection;

the scores in the figure are indicated as: the valve rod connector 1 is a valve rod connector, the flashboard 2 is a flashboard, the valve rod 3 is a valve rod, the hollow cylindrical component 101 is a hollow cylindrical component, the annular groove 102 is a circular groove, the internal thread 103 is a cylindrical protrusion 104, the cylindrical socket 201 is a cylindrical socket groove, and the annular protrusion 202 is a circular protrusion.

Detailed Description

The present invention will be described in detail with reference to the following embodiments. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that various changes and modifications can be made by one skilled in the art without departing from the spirit of the invention. These all belong to the protection scope of the present invention. Portions not described in detail in the following embodiments may be implemented using existing components.

Referring to fig. 1, for the structure schematic diagram of the valve rod joint of the preferred embodiment of the present invention, including hollow cylindrical component 101 in the figure, the inner wall of hollow cylindrical component 101 one end is equipped with internal thread 103 for connecting valve rod 3, and the other end of hollow cylindrical component 101 is equipped with the lug structure for the joint, and this lug structure and 2 joints of flashboard make the one end of valve rod joint 1 lock with flashboard 2. Preferably, the internal thread is a trapezoidal thread, and the outer wall of the valve rod 3 is provided with a matching trapezoidal thread. The profile of the trapezoidal thread is isosceles trapezoid, and the preferred profile angle is 30 °. The trapezoidal thread connection is adopted, so that the inner thread and the outer thread are tightly attached by the conical surface and are not easy to loosen, and the wear-resisting and centering device also has the advantages of good wear resistance, good centering performance and the like.

In other preferred embodiments, the bump structure is composed of a cylindrical protrusion 104 and an annular groove 102, wherein the cylindrical protrusion 104 is located at one end of the hollow cylindrical member 101, the annular groove 102 is disposed on the outer wall of the hollow cylindrical member 101, the annular groove 102 is disposed between the cylindrical protrusion 104 and the hollow cylindrical member 101, and the cylindrical protrusion 104, the annular groove 102 and the hollow cylindrical member 101 are sequentially arranged and communicated with each other to form a whole. The annular groove 102 and the columnar protrusion 104 are in smooth transition. In addition, the outer diameter of the columnar projection 104 is larger than the outer diameters of the annular groove 102 and the hollow columnar member 101, and the outer diameter of the annular groove 102 is smaller than the outer diameter of the hollow columnar member 101. Preferably, the length of the columnar projection 104 is 1/10-1/4 of the length of the hollow columnar member 101.

Referring to fig. 2, in another embodiment of the present invention, a schematic diagram of a connection structure of a valve rod and a gate plate is provided, in which a valve rod connector 1 is included, the valve rod connector 1 is sleeved on one end of a valve rod 3 and connected through an internal thread 103, and a bump structure at the other end of the valve rod connector 1 is connected with the gate plate 2 through a clamping joint. As an optimal mode, a clamping groove structure used for clamping is arranged at one end of the flashboard 2, and the shape and the size of the clamping groove structure are matched with those of the bump structures. After the slot structure is inserted into the columnar protrusion 104 of the bump structure, the slot structure is clamped into the annular groove 102 to achieve locking. When using, drive valve rod joint 1 through rotatory valve rod 3 and remove to make valve rod joint 1 drive flashboard 2 through the lug structure and remove, realize opening and closing of slide valve, make flashboard 2 be in the state of floating through above-mentioned connected mode, therefore make the switch torque of slide valve less, thereby reduced slide valve switch moment of torsion, improved valve rod 3 and the flashboard lug connection that traditional slide valve adopted and had the great problem of moment of torsion.

In other preferred embodiments, referring to fig. 3, the slot structure is composed of a cylindrical socket 201 and an annular convex edge 202, wherein the cylindrical socket 201 is a cylindrical groove formed by one end of the gate plate 2 sinking inwards; the shape of the columnar socket 201 is matched with that of the columnar bulge 104, and the outer diameter size of the columnar bulge 104 is slightly smaller than that of the columnar socket 201; the annular convex edge 202 is arranged at the socket end of the columnar socket 201, and is a section which is extended inwards from the inner wall of the socket end, a circle of convex edge is formed at the socket end of the columnar socket 201, and the inner diameter of the convex edge is smaller than the outer diameter of the socket end. The annular ridge 202 is shaped and sized to mate with the annular groove 102. During the installation with valve rod joint lug structure put in flashboard one side later slowly to flashboard column socket in the propulsion make valve rod joint 1's lug structure be connected with flashboard 2, with the protruding 104 of the column of lug structure insert in column socket 201, the protruding 104 of this column closely cooperates with the inner wall of column socket 201 to make the protruding stupefied 202 joint of annular of flashboard 2 in annular groove 102, make valve rod joint 1 and flashboard 2 locking.

In other partially preferred embodiments, one end of the valve stem 3 is provided with an external thread having a size matching the size of the internal thread 103 of the valve stem adapter 1; preferably, the external thread is a trapezoidal thread.

Based on the above embodiment, in another embodiment of the utility model, the utility model discloses a gate valve is still provided, and this gate valve includes the connection structure's of valve rod and flashboard of above-mentioned embodiment gate valve. The connecting structure of the valve rod and the gate of the existing gate valve is improved to form a novel gate valve which is easy to open and close manually. This slide valve drives the valve rod joint through the rotary valve pole and removes when using to make the valve rod joint drive the flashboard through the lug structure and remove, realize that the slide valve opens and closes, make the flashboard be in the floating condition through above-mentioned connected mode, therefore make slide valve switch moment of torsion less, thereby reduced slide valve switch moment of torsion, it is great with the flashboard lug connection existence moment of torsion to have improved the valve rod that traditional slide valve adopted, leads to the manual problem that can't open or open the difficulty. And the gate valve has simple structure.

The foregoing description of the specific embodiments of the invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by those skilled in the art within the scope of the appended claims without departing from the spirit of the invention.

Claims

1. A valve stem connector characterized by: including cavity column part, the inner wall of cavity column part one end is equipped with the internal thread that is used for connecting the valve rod, the cavity column part other end is equipped with the lug structure that is used for the joint.

2. The valve stem adapter of claim 1, wherein: the internal thread is a trapezoidal thread.

3. The valve stem adapter of claim 1, wherein: the bump structure is composed of an annular groove and a columnar protrusion, wherein the columnar protrusion is located at one end of the hollow columnar component, the annular groove is formed in the outer wall of the hollow columnar component, the annular groove is formed between the columnar protrusion and the hollow columnar component, and the interiors of the columnar protrusion, the annular groove and the hollow columnar component are communicated.

4. A valve stem union as defined in claim 3, wherein: the outer diameter of the columnar bulge is larger than that of the hollow columnar part; the outer diameter of the annular groove is smaller than the outer diameter of the hollow cylindrical member.

5. A valve stem and gate connecting structure, comprising the valve stem adapter according to any one of claims 1 to 4, wherein the valve stem adapter is connected to the valve stem via the internal thread, and the valve stem adapter is connected to the gate via the projection structure.

6. The connecting structure of the valve rod and the gate plate as claimed in claim 5, wherein one end of the gate plate is provided with a clamping groove structure for clamping, and the shape and size of the clamping groove structure are matched with those of the bump structure.

7. The connecting structure of the valve rod and the gate plate according to claim 6, wherein the groove structure is composed of a cylindrical socket groove and an annular convex edge, wherein one end of the gate plate is provided with the cylindrical socket groove which is recessed inwards, and the shape and the size of the cylindrical socket groove are matched with those of the cylindrical protrusion; the socket end of the columnar socket slot is provided with an annular convex edge extending inwards from the inner wall of the columnar socket slot, and the shape and size of the annular convex edge are matched with the annular groove.

8. The valve stem and shutter connection structure according to claim 6, wherein an end of the valve stem is provided with an external thread.

9. The valve stem and shutter connection of claim 8, wherein the external thread is a trapezoidal thread.

10. A gate valve comprising a valve stem to gate connection as claimed in any one of claims 5 to 9.