CN102466056A

CN102466056A - Ball valve

Info

Publication number: CN102466056A
Application number: CN2010105393831A
Authority: CN
Inventors: 郑旭锋; 王喜忠
Original assignee: Zhejiang Sanhua Co Ltd
Current assignee: Zhejiang Sanhua Co Ltd
Priority date: 2010-10-31
Filing date: 2010-10-31
Publication date: 2012-05-23

Abstract

The invention relates to a ball valve. The ball valve comprises a valve body, a valve seat, a valve core ball and a valve rod, wherein the valve seat is connected to the valve body; the valve core ball is arranged in the valve body; the valve rod drives the valve core ball; the valve seat is fixedly connected with a first connecting pipe connected with the end of an outdoor machine; the valve body is fixedly connected with a second connecting pipe connected with an indoor machine; the first connecting pipe is connected with the outdoor machine; the second connecting pipe is connected with the indoor machine; and a channel is arranged between a through hole of the valve core ball and the outer wall on one side of the valve core ball. The channel is communicated with the first connecting pipe and the through hole when the ball valve is closed. When the ball valve is arranged, pressure in the valve core ball is released into the pipeline through the channel, so that pressure of the inner cavity of the valve core ball is balanced with the pressure of the pipeline, and product failure caused by overmuch pressure when temperature is increased is avoided.

Description

A kind of ball valve

Technical field

The present invention relates to a kind of ball valve that is used for refrigeration system.

Background technique

Ball valve is widely used in the refrigeration system, play connect and to refrigerant by effects such as, conductings.Please with reference to Fig. 1, Fig. 2, Fig. 3 A, Fig. 3 B.Fig. 1 is the structural drawing that a kind of typical ball valve of existing technology is in full-gear, and Fig. 2 is the schematic representation that ball valve shown in Figure 1 is in full-shut position; Fig. 3 A is the spool spherical structure schematic representation of existing technology, and Fig. 3 B is the left view of Fig. 3 A.Ball valve comprises valve body 5, is connected the valve seat 2 on the valve body 5, is arranged on the bonnet 7 of valve body 5 opening parts; Wherein, the two ends of valve seat 2 are fixedly connected with first respectively and take over 1 and second and take over 8, the first and take over 1 and link to each other with outdoor unit, and second adapter 8 links to each other with indoor set.Be provided with spool ball 4 and the valve rod 6 that drives said valve core ball 4 in the valve body 5, be provided with sealed member 3 between the inwall of spool ball 4 and valve seat 2.Through operating valve lever 6, spool ball 4 is rotated, thus conducting or blind off a line.

In the prior art, ball valve adopts following method to install: when spool ball 4 is in full-gear, takes over 1 through welding manner with first and be connected with outdoor unit; At this moment, the indoor set connecting end, i.e. second adapter, 8 places seal with rapid pipe joint; Then pipeline is carried out vacuumizing after the Leak testtion, charge into refrigerant through the filled valve on the pipeline again, operating valve lever 6 after coolant injection finishes; Spool ball 4 is rotated, close ball valve, again second adapter 8 is connected with indoor set through welding manner.Direction shown in the thick arrow is the refrigerant flow direction among Fig. 1, down together.

In above-mentioned installation process; Have following problem: behind coolant injection goal valve, operating valve lever 6 rotates spool ball 4 and cuts out in the process of ball valve; Understand some refrigerant through the opening 9 of spool ball and the gap between valve body and the spool ball 9, get into the inner chamber of valve body.When second adapter 8 was welded with indoor set, temperature raise, and it is big that the pressure of body cavity also becomes along with the rising of temperature.Owing to be provided with sealed member 3 between the inwall of spool ball 4 and valve seat 2, make the refrigerant pressure of valve core cavity can't obtain discharging, thereby cause that easily product destroys and refrigerant leaks, there is bigger potential safety hazard.

Therefore, how overcoming existing technology existing potential safety hazard in installation process, provide a kind of Safety performance better ball valve, is the technical problem that those skilled in the art need to be resolved hurrily.

Summary of the invention

The technical problem that the present invention will solve and the technical assignment of proposition are to overcome the defective that exists in the existing technology, provide a kind of safe, in installation process, are difficult for producing the ball valve of potential safety hazard.For realizing above-mentioned purpose, the present invention discloses a kind of ball valve, and concrete scheme is following:

A kind of ball valve; Comprise valve body, be connected valve seat on the valve body, be arranged on the valve core ball in the valve body and drive the valve rod of said valve core ball; Said valve seat is fixedly connected with first and takes over; Be fixedly connected with second on the said valve body and take over, it is characterized in that having passage between the side outer wall of the opening of said spool ball and spool ball.

Preferably, said first adapter is connected with outdoor unit, and said second adapter is connected with indoor set, and said passage is communicated with said first and takes over and said opening when ball valve is closed.

Preferably, be respectively arranged with sealed member between said spool ball and said valve body and the said valve seat, the aperture position of said passage is arranged on ball valve when closing not by in the spool ball outer wall area of sealed member sealing.

Preferably, said sealed member is a sealing gasket.

Preferably, said passage is a circular hole, is positioned on the center line of said spool ball.Passage is circular hole and is positioned on the center line of spool ball, is convenient to machining.

Alternatively, said spool ball top offers the groove that matches with said valve rod, is provided with the balance aperture between said groove and the said opening, and said balance aperture connects said groove and said opening.

Scheme of the present invention; Through the opening of spool ball with and outdoor unit be connected first passage is set between taking over; Can be when ball valve be installed; Through said passage spool ball pressure inside is released in the pipeline, thereby makes spool ball chamber pressure and pipeline pressure balance each other, thereby avoided Yin Wendu to raise and cause pressure to cross the situation of ambassador's product failure.

Description of drawings

Fig. 1: the typical structure schematic representation of the ball valve full-gear of existing technology;

Fig. 2: the typical structure schematic representation of the ball valve full-shut position of existing technology;

Fig. 3 A: the spool spherical structure schematic representation of existing technology;

Fig. 3 B: the left view of Fig. 3 A;

Fig. 4: ball valve of the present invention is in the structural representation of full-shut position;

Fig. 5 A: the spool spherical structure schematic representation of the embodiment of the invention one;

Fig. 5 B: the left view of Fig. 5 A;

Fig. 6 A: the spool spherical structure schematic representation of the embodiment of the invention two;

Fig. 6 B: the left view of Fig. 5 A.

Symbol description among the figure:

1-first takes over; The 2-valve seat; The 3-sealed member; 4-spool ball; The 5-valve body; The 6-valve rod; The 7-bonnet; 8-second takes over; The 9-opening; 10-balance aperture; The 11-passage; The 12-groove.

Embodiment

Below in conjunction with exemplary embodiments, technological scheme of the present invention is described.For the ease of technological scheme of the present invention is described, adopt same numbering to represent for the parts that have same structure and a function with existing technology among the present invention program.

Please with reference to Fig. 4, Fig. 5 A, Fig. 5 B, wherein, Fig. 4 is the structural representation that ball valve of the present invention is in full-shut position; Fig. 5 A is the spool spherical structure schematic representation of first embodiment of the invention; Fig. 5 B is the left view of Fig. 5 A.

The agent structure of ball valve is a valve body 5; In valve body 5, be provided with the spool ball 4 of a spheroidal, an end of valve body 5 is equipped with valve seat 2, and valve seat 2 cooperates with valve body 5 through being threaded; Between spool ball 4 and valve body 5 and valve seat 2, be respectively arranged with sealed member 3; Guaranteeing that ball valve opening airtight with the closed state lower valve chamber, the direction of spool ball 4 is airtight respectively dorsad is connected with first and takes over 1 and second adapter 8 for valve body 5 and valve seat 2, as the inlet passage and the outlet passage of ball valve; Spool ball 4 communicates with the external world through valve rod 5; The upper end that is spool ball 4 offers groove 12, and the shape that is complementary with above-mentioned groove 12 is processed in the lower end of actuate valve stem 6, and ball valve opened or closed to spool ball 4 can through rotation valve rod 6 after assembling with valve rod 6.

Spool ball 4 is the billiard table shape substantially, is provided with opening 9 along the center line of billiard table, and the opening portion diameter of the diameter of this opening 9 and valve seat 2 and valve body 5 adapts.Two end faces of billiard table are parallel to each other, are provided with two sealed members 3 at spool ball 4 and valve seat 2 and valve body 5 contacted positions, and sealed member 3 can adopt the mode of seal ring, and the sphere of sealing circle and spool ball 4 is complementary to realize sealing.

Spool ball 4 is provided with groove 12 at an end of another centerline direction, and the center line at this center line and above-mentioned opening 9 places is orthogonal.Groove 12 is used for cooperating with the lower end of actuate valve stem 6, to realize controlling through the operation of actuate valve stem 6 rotation of spool ball 4.

When operation actuate valve stem 6; The spool ball is rotated and close in the ball valve, it is a sphere that spool ball 4 is taken over an end outer wall of 1 near first, and the part area of this sphere is covered by sealed member 3; Not by the outer wall area of sealed member 3 sealings, its cross section is rounded substantially.In first embodiment of the invention, above-mentionedly be provided with passage 11 not by in the spool ball outer wall area of sealed member sealing, passage 11 runs through spool ball outer wall, and opening 9 is connected with first adapter.

As preferred embodiment, opening 11 is opened in along on the central axis of first adapter, 1 and second adapter 8, is shaped as a small sircle hole.Passage is circular hole and is positioned on the center line of spool ball, is convenient to machining.Certainly based on design of the present invention, can adopt replacement scheme arbitrarily, except that circular hole, can be any other shape; The position of passage 11 also can arbitrarily be adjusted, and only need guarantee that when the ball valve closed condition, the outlet of passage 11 is positioned at the spool ball can not realized the present invention by the sealed member enclosed areas.

Please with reference to Fig. 6 A, Fig. 6 B, Fig. 6 A are the spool spherical structure schematic representation of second embodiment of the invention, and Fig. 6 B is the left view of Fig. 6 A.

In this mode of execution, in the groove 12 that spool ball 4 upper ends cooperate with valve rod, other offers balance aperture 10, and this balance aperture connects groove 12 and opening 9.Part refrigerant can get into the upper end of ball valve through balance aperture 10, thereby can play the effect of partial equilibrium pressure.All the other structures of this mode of execution are identical with first mode of execution, give unnecessary details no longer one by one at this.

Need to prove that position relations such as " upper end, lower ends " described in the specification of the present invention is to describe to the position relation shown in the Figure of description, can not be interpreted as the restriction to protection domain of the present invention.

Below only be for setting forth technological scheme of the present invention; The preferred implementation of being given an example; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; Can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.

Claims

1. ball valve; Comprise valve body (5), be connected valve seat (2) on the valve body (5), be arranged on valve core ball (4) and the valve rod (6) of the said valve core ball of driving (4) in the valve body (5); Be fixedly connected with first on the said valve seat (2) and take over (1); Be fixedly connected with second on the said valve body (5) and take over (8), it is characterized in that having passage (11) between the opening (9) of said spool ball (4) and the side outer wall of spool ball (4).

2. ball valve as claimed in claim 1 is characterized in that, said first takes over (1) is connected with outdoor unit, and said second takes over (8) is connected with indoor set, and said passage (11) is communicated with said first and takes over (1) and said opening (9) when ball valve is closed.

3. ball valve as claimed in claim 2; It is characterized in that; Be respectively arranged with sealed member (3) between said spool ball (4) and said valve body (5) and the said valve seat (2), the aperture position of said passage (11) is arranged on ball valve when closing not by in the spool ball outer wall area of sealed member (3) sealing.

4. ball valve as claimed in claim 3 is characterized in that, said sealed member (3) is a sealing gasket.

5. ball valve as claimed in claim 3 is characterized in that, said passage (11) is a circular hole, is positioned on the center line of said spool ball.

6. like claim 2 or 3 described ball valves; It is characterized in that; Said spool ball (4) top offers the groove (12) that matches with said valve rod; Be provided with balance aperture (10) between said groove (12) and the said opening (9), said balance aperture (10) connects said groove (12) and said opening (9).