CN209876016U

CN209876016U - Small ball valve

Info

Publication number: CN209876016U
Application number: CN201920830481.7U
Authority: CN
Inventors: 李家德; 吴高峰
Original assignee: Taizhou Aidi Xisheng Big Hvac Technology Co Ltd
Current assignee: Taizhou Aidi Xisheng Big Hvac Technology Co Ltd
Priority date: 2019-06-04
Filing date: 2019-06-04
Publication date: 2019-12-31
Anticipated expiration: 2029-06-04

Abstract

The utility model provides a small-size ball valve belongs to valve manufacturing technical field. It has solved the problem that current ball valve can not satisfy little space installation requirement. This small-size ball valve includes case, valve rod and valve body, and the case has the water hole of crossing through and the case is located the valve body, and the inner and the case of valve rod link firmly mutually, and the valve body setting is stretched out to the outer end of valve rod, and valve body threaded connection has the valve cap that is used for pressing from both sides the case tight, and the valve rod stretches into and is equipped with the location structure who is used for the valve rod location between the tip of valve body and the valve cap. The utility model has the advantages of convenient assembly, small volume and capability of meeting the installation requirement of a small space.

Description

Small ball valve

Technical Field

The utility model belongs to the technical field of the valve is made, a ball valve is related to, in particular to small-size ball valve.

Background

The valve core of the ball valve is a spherical opening and closing part with the middle part penetrating through, the valve core is driven by the valve rod and rotates around the axis of the valve rod, and the ball valve is mainly used for cutting off or connecting media in a pipeline and can also be used for regulating and controlling fluid. The ball valve needs to set a quantitative flow position, usually the quantitative position is the position where the valve core rotates 90 degrees, the opening degree of the valve core is the largest at the moment, and therefore the ball valve is provided with a positioning structure for positioning the valve rod.

For example, chinese patent literature discloses a ball valve positioning device [ application number: 201320798990.9, respectively; authorization notice number: CN203641558U ], it includes the valve rod, sets up stopper, the spacer on the valve, is equipped with the spacing groove on the stopper, and the spacer is fixed to be set up on the valve rod, spacer and spacing groove adaptation are equipped with the location ear of two symmetries on the spacer, and the location ear is located the spacing inslot, and location ear and spacing groove adaptation constitute rotation limit structure.

Foretell ball valve positioner passes through the setting of spacer, stopper for the valve rod location is convenient, and structural strength is high, long service life, but spacer, stopper all set up in the valve body outside, have increased the valve body volume, in the place of some space restrictions, can't accomplish the installation, and the valve body has two parts with the ball valve centre gripping moreover, and rethread bolt-up, the equipment is inconvenient, and whole volume is also great, unsatisfied the installation requirement in little space.

Disclosure of Invention

The utility model aims at providing a convenient, small and exquisite small-size ball valve of equipment to the above-mentioned problem that exists among the prior art.

The purpose of the utility model can be realized by the following technical proposal: the utility model provides a small-size ball valve, includes case, valve rod and valve body, the case have the water hole of crossing through and the case is located the valve body, the inner of valve rod link firmly with the case mutually, the valve body setting is stretched out to the outer end of valve rod, its characterized in that, valve body threaded connection have and be used for the tight valve cap of case clamp, the valve rod stretch into and be equipped with the location structure who is used for the valve rod location between tip and the valve cap of valve body.

When the small ball valve is assembled, the valve rod and the valve core are firstly installed in the valve body, and then the valve cap is assembled, so that the small ball valve is convenient to assemble; the positioning structure is arranged in the valve body, so that the positioning structure cannot occupy an external installation space, the whole volume is conveniently made small, and the installation requirement of a small space is met.

In foretell small-size ball valve, location structure include that the valve rod stretches into some cutting face one and cutting face two of tip peripheral surface of valve body, the axis perpendicular to that crosses the water hole cut the plane setting that face one was located, cutting face two and cutting face one between contained angle be 90 and cut face one and cut through the arcwall face transition between the face two, the valve cap stretch into the inner formation of valve body and supply to cut face one or cut the portion of leaning on that face two leaned on.

In the above-mentioned small-size ball valve, the end of the valve rod extending into the valve body is provided with a circle of convex ring protruding radially, the first cutting surface, the second cutting surface and the arc surface are positioned on the outer peripheral surface of the lower half part of the convex ring, and the valve body is provided with a blocking shoulder for the convex ring to abut against.

In the above-mentioned small-size ball valve, the outer peripheral surface of the valve cap has a circle of limiting parts which are radially protruded to allow the end of the valve body to abut against, and the inner wall of the valve cap has a hexagon socket.

In the above-mentioned small ball valve, the outer peripheral surface of the end part of the valve rod extending into the valve body is provided with a ring of concave annular grooves, at least two sealing rings sealed on the valve body are arranged in the annular grooves, the valve rod is provided with a step transiting from the annular groove to the convex ring, and the outer diameter of the step is smaller than that of the convex ring. The leakproofness between valve rod and the valve body is good like this, and the step is avoided stress concentration in protruding circle department, and valve rod structural strength is good, long service life.

As another kind of condition, in foretell small-size ball valve, location structure include that the valve rod stretches into the spacer that the tip of valve body linked firmly, the outer peripheral face of spacer have locating surface one, transition face and locating surface two, the axis perpendicular to locating surface one plane setting in water hole, locating surface one and locating surface two between the contained angle be 90, the transition face be the cambered surface, the valve cap stretch into the inner of valve body and supply locating surface one or locating surface two to support and lean on.

In the small ball valve, the inner end of the valve rod is provided with an axially protruding embedding block, the outer wall of the valve core is provided with a clamping groove for embedding the embedding block, and sealing gaskets are arranged on two sides of the valve core. Therefore, the valve rod is conveniently connected with the valve core, and the sealing property of the two sides of the valve core is good.

In the small ball valve, the outer end of the valve rod is provided with an inner hexagonal blind hole. The inner hexagonal blind hole facilitates the operation of an inner hexagonal wrench, a handle is omitted, the whole volume is reduced, and the installation requirement of a small space is met.

Compared with the prior art, the small ball valve is convenient to assemble, good in sealing performance, compact in structure, small in size and capable of meeting the installation requirement of a small space.

Drawings

Fig. 1 is a structural sectional view of the small ball valve.

Fig. 2 is a schematic structural diagram of the small ball valve when the valve core is in an open state.

Fig. 3 is a schematic structural diagram of the small ball valve when the valve core is in a closed state.

Fig. 4 is a schematic perspective view of the valve stem of the miniature ball valve.

FIG. 5 is a schematic structural view of a spacer in embodiment 2 of the present miniature ball valve.

In the figure, 1, a valve core; 11. water passing holes; 2. a valve stem; 21. cutting surface one; 22. cutting a second surface; 23. an arc-shaped surface; 24. a convex ring; 25. a step; 26. a scarf block; 27. a hexagonal blind hole; 3. a valve body; 31. a shoulder block; 4. a bonnet; 41. an abutting portion; 42. a limiting part; 43. an inner hexagonal hole; 5. a seal ring; 6. positioning plates; 61. a first positioning surface; 62. a transition surface; 63. a second positioning surface; 7. and a gasket.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

Example 1

As shown in figure 1, this small-size ball valve includes case 1, valve rod 2 and valve body 3, and case 1 has the water hole 11 and case 1 that link up and is located valve body 3, and the inner of valve rod 2 links firmly with case 1 mutually, and the outer end of valve rod 2 stretches out the setting of valve body 3, and 3 threaded connection of valve body has a valve cap 4 that is used for pressing from both sides case 1 tightly, and valve rod 2 stretches into and is equipped with the location structure who is used for valve rod 2 location between the tip of valve body 3 and the valve cap 4.

In more detail, as shown in fig. 1 and 4, the positioning structure in this embodiment includes a first cutting surface 21 and a second cutting surface 22 on an outer peripheral surface of an end portion of the valve rod 2 extending into the valve body 3, an axis of the water through hole 11 is perpendicular to a plane where the first cutting surface 21 is located, an included angle between the second cutting surface 22 and the first cutting surface 21 is 90 °, the first cutting surface 21 and the second cutting surface 22 are transited through an arc surface 23, and an abutting portion 41 for abutting against the first cutting surface 21 or the second cutting surface 22 is formed at an inner end of the valve bonnet 4 extending into the valve body 3.

The valve rod 2 is provided with the first cutting face 21, the second cutting face 22 and the arc face 23 in a machining mode, machining is convenient, interference of the arc face 23 is avoided, and the valve rod 2 rotates smoothly; when the small ball valve is used, as shown in fig. 2, when the first cutting surface 21 abuts against the abutting portion 41, the opening degree of the valve core 1 is maximum, and as shown in fig. 3, when the second cutting surface 22 abuts against the abutting portion 41, the valve core 1 is in a closed state.

The end that valve rod 2 stretched into valve body 3 has the protruding circle 24 of the radial bulge of a circle, and cutting face one 21, cutting face two 22 and arcwall face 23 are located the outer peripheral face of protruding circle 24 lower half, and valve body 3 has the fender shoulder 31 that supplies protruding circle 24 to contradict, and protruding circle 24 is contradicted in fender shoulder 31 like this, and the restriction valve rod 2 axial moves outward, and makes compact structure, reduces 2 axial length of valve rod for whole small in size.

The outer peripheral face of valve cap 4 has the spacing portion 42 of the radial protrusion of round in order to supply 3 tip conflicts of valve body, the inner wall of valve cap 4 has interior hexagonal hole 43, the setting of spacing portion 42 makes valve cap 4 stretch into the length of valve body 3 and confirms, the uniformity of product is good, avoid leaning on portion 41 and valve rod 2 to produce the interference, one section hexagonal prism section that interior hexagonal hole 43's setting has saved 4 peripheral faces of valve cap in the past has, valve cap 4 axial length has been shortened, the volume has been reduced, interior hexagonal hole 43 supplies interior hexagonal wrench hand operation effect, valve cap 4 is convenient to connect.

For good sealing performance and long service life, the peripheral surface of the end part of the valve rod 2 extending into the valve body 3 is provided with a circle of concave annular grooves, two sealing rings 5 sealed on the valve body 3 are arranged in the annular grooves, the valve rod 2 is provided with a step 25 transiting from the annular groove to a convex ring 24, and the outer diameter of the step 25 is smaller than that of the convex ring 24; in order to facilitate connection and have good sealing performance, the inner end of the valve rod 2 is provided with an axially protruding embedding block 26, the outer wall of the valve core 1 is provided with a clamping groove for embedding the embedding block 26, and two sides of the valve core 1 are provided with sealing gaskets 7; in order to reduce the volume and facilitate the operation, the outer end of the valve rod 2 is provided with a hexagonal socket 27, and the hexagonal socket 27 is axially arranged.

Example 2

As shown in fig. 5, the structure and principle of the present embodiment are substantially the same as those of embodiment 1, and the difference lies in that in the present embodiment, the positioning structure includes a positioning plate 6 fixedly connected to an end portion of the valve rod 2 extending into the valve body 3, a first positioning surface 61, a transition surface 62 and a second positioning surface 63 are provided on an outer peripheral surface of the positioning plate 6, an axis of the water through hole 11 is perpendicular to a plane where the first positioning surface 61 is located, an included angle between the first positioning surface 61 and the second positioning surface 63 is 90 °, the transition surface 62 is an arc surface, and the bonnet 4 extends into an inner end of the valve body 3 to be abutted by the first positioning surface 61 or the second positioning surface 63. The middle part of spacer 6 has the quad slit, scarf joint piece 26 is the square block shape and passes the quad slit setting with the adaptation in this embodiment, valve rod 2 has the tip that stretches into valve body 3 and has the radial convex bulge loop 24 of round, valve body 3 has the fender shoulder 31 that supplies bulge loop 24 to contradict, spacer 6 is compressed tightly in case 1 setting by bulge loop 24, valve rod 2 drives spacer 6 synchronous rotation, when locating surface 61 supports and leans on in the valve cap 4 inner, case 1's the degree of opening is the biggest, when locating surface two 63 support and lean on in the valve cap 4 inner, case 1 is in the closed condition.

Those not described in detail in this specification are within the skill of the art. The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. The utility model provides a small-size ball valve, includes case (1), valve rod (2) and valve body (3), case (1) have the water hole (11) of crossing through and case (1) is located valve body (3), the inner of valve rod (2) link firmly mutually with case (1), the outer end of valve rod (2) stretches out valve body (3) setting, its characterized in that, valve body (3) threaded connection have and is used for valve core (1) tight valve cap (4) of clamp, valve rod (2) stretch into and be equipped with the location structure who is used for valve rod (2) location between tip and the valve cap (4) of valve body (3).

2. A miniature ball valve according to claim 1, wherein said positioning structure comprises a first cutting surface (21) and a second cutting surface (22) provided on the outer peripheral surface of the end portion of the valve stem (2) extending into the valve body (3), the axis of said water through hole (11) is perpendicular to the plane of the first cutting surface (21), the included angle between the second cutting surface (22) and the first cutting surface (21) is 90 °, the first cutting surface (21) and the second cutting surface (22) are transited by an arc-shaped surface (23), and the inner end of the valve cap (4) extending into the valve body (3) forms an abutting portion (41) against which the first cutting surface (21) or the second cutting surface (22) abuts.

3. A miniature ball valve according to claim 2, wherein the end of said valve stem (2) extending into said valve body (3) has a radially protruding collar (24), said first cutting surface (21), said second cutting surface (22) and said arcuate surface (23) being located on the outer peripheral surface of the lower half of said collar (24), said valve body (3) having a shoulder (31) against which said collar (24) abuts.

4. A miniature ball valve according to claim 3, wherein said valve cap (4) has a radially protruding stopper (42) on its outer peripheral surface for abutting against the end of said valve body (3), and the inner wall of said valve cap (4) has a hexagonal socket (43).

5. A miniature ball valve according to claim 4, wherein said valve stem (2) has a recessed annular groove on its outer periphery at the end extending into said valve body (3), said annular groove having at least two sealing rings (5) for sealing with said valve body (3), said valve stem (2) having a step (25) transitioning from said annular groove to said male ring (24), said step (25) having an outer diameter smaller than the outer diameter of said male ring (24).

6. A small-sized ball valve according to claim 1, wherein the positioning structure comprises a positioning plate (6) fixedly connected to the end of the valve rod (2) extending into the valve body (3), the outer peripheral surface of the positioning plate (6) is provided with a first positioning surface (61), a transition surface (62) and a second positioning surface (63), the axis of the water through hole (11) is perpendicular to the plane where the first positioning surface (61) is located, the included angle between the first positioning surface (61) and the second positioning surface (63) is 90 °, the transition surface (62) is an arc surface, and the inner end of the valve bonnet (4) extending into the valve body (3) is abutted to the first positioning surface (61) or the second positioning surface (63).

7. A miniature ball valve according to any one of claims 1 to 6, wherein the inner end of said valve stem (2) has an axially protruding engagement block (26), the outer wall of said valve element (1) has a groove for engagement of said engagement block (26), and both sides of said valve element (1) are provided with sealing gaskets (7).

8. A miniature ball valve according to claim 7, characterized in that the outer end of said valve stem (2) has a hexagonal blind bore (27).