CN2700651Y

CN2700651Y - Refrigerating valve

Info

Publication number: CN2700651Y
Application number: CN 200420025967
Authority: CN
Inventors: 许炎章
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-04-02
Filing date: 2004-04-02
Publication date: 2005-05-18
Anticipated expiration: 2014-04-02

Abstract

The utility model relates to a valve, in particular to a steel valve which is applicable to the control of all the universal refrigeration agent, non-corrosive gas and non-corrosive liquid. The utility model is composed of a valve body, a valve cover, a valve handle sleeve and a valve flap. An enter pipe and an exit pipe are provided on the valve body. The valve handle sleeve is provided on the valve cover, and is connected as an integral with the valve cover. The valve flap is provided on the front end of the valve handle. The valve handle sleeve is sleeved on the valve handle, and the valve handle and the valve handle sleeve are connected with screws. A sealing cover is provided between the valve handle and the valve handle sleeve. The valve body and the valve cover are connected with screw bolts, and are sealed through an O-shaped ring. The valve handle and the valve flap form slip connection through clamping a dummy club on the valve handle to a U-shaped chute on the valve flap. The valve body and the valve flap form the reverse sealing through the conical surface contact. The sealing cover and the valve handle are sealed with a combined cushion ring, and the valve handle and the sealing cover are sealed with a double layer sealing ring. The refrigerating valve of the utility model has compact structure, convenient maintenance, great sealing performance and long service life.

Description

Refrigeration valve

Affiliated technical field

The utility model relates to a kind of valve, especially a kind of steel valve that is applicable to refrigeration agent that all are general and noncorrosive gases and liquid control.

Background technique

Valve is in refrigeration, freezing, air-conditioning, heat pump, chemical industry, extensively utilization in oil and other industry, the steel valve that is used for the control of general refrigeration agent and noncorrosive gases and liquid at present mostly adopts the valve of conventional construction, valve such as stop valve commonly used, regulate stop valve, safety check, screw down nonreturn valve etc., because its structural reason, make and have the slipper seal point between valve rod and valve body, be difficult to solve the sealing problem of refrigeration agent, owing to making the production technology reason, may there be off-centre in valve rod, the sealing when if flap and valve body decentraction can influence valve closing, leakage phenomenon appears, and flap is subjected to frictional force to influence serious wear, influence working life, the valve seat of middle small dimension generally adopts forged steel structure, and the valve seat of the valve of big specification generally adopts steel-pipe construction, and valve seat connects the employing flange and connects with pipeline, be prone to leakage phenomenon.

Summary of the invention

In order to overcome the deficiency of existing valve, it is not easy to wear in a kind of using process that the utility model provides, good seal performance, the refrigeration valve of long service life.

The technological scheme that its technical problem that solves the utility model adopts is: a kind of refrigeration valve, has valve body, valve gap, valve rod, valve stem casing, flap, valve body is provided with inlet pipe and goes out pipe, valve stem casing is arranged on the valve gap, and fuse with valve gap, flap is arranged on the valve rod front end, valve stem casing is enclosed within on the valve rod, valve rod and valve stem casing are with being threaded, valve body is connected with the valve cover chamber bolt, seal with O type circle between valve gap and valve body, valve rod is provided with boss, and flap is provided with the U-shaped chute, and valve rod and flap are slidingly connected by the U-shaped chute formation that the boss on the valve rod snaps on the flap, the inlet pipe connecting end inner chamber and the flap head of valve body are respectively arranged with the conical surface, and valve body contacts by the conical surface with flap and forms back seal.

Further: be provided with sealing cover between described valve rod and valve stem casing, sealing cover is threaded with valve stem casing, seals with bonded washer between sealing cover and valve stem casing.

Again further: be provided with two " O " type circle sealings between valve rod and sealing cover.

Rotary valve rod, valve rod drives flap and moves down, the conical surface of flap head contacts with the conical surface of body cavity, valve closing, the counterrotating valve rod is valve open then, as valve rod and valve body decentraction, then be connected with valve stem slides because of flap, flap can be adjusted to valve body concentric automatically, reliable sealing when guaranteeing valve closing, the heavy wear of avoiding flap and valve body to cause because of decentraction.

The beneficial effects of the utility model are; compact structure; valve body and flap adopt back seal to safeguard valve rod under working state of system easily; be provided with the sealing of double-layer seal circle between valve rod and sealing cover; inlet pipe with go out pipe and can directly be connected with pipeline welding; sealability is better, and flap and valve body concentricity are regulated automatically, and sealing when having guaranteed valve closing and protection flap are avoided the influence of frictional force.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is the structural representation of refrigeration valve of the present utility model.

Fig. 2 is the structural representation of flap.

Fig. 3 is the plan view of Fig. 2.

Among the figure 1, valve body, 2, valve gap, 3, valve rod, 31, boss, 4, valve stem casing, 5, flap, 51, the U-shaped chute, 6, inlet pipe, 7, go out pipe, 8, sealing cover, 9, seal ring.

Embodiment

A kind of refrigeration valve as shown in Figure 1, has valve body 1, valve gap 2, valve rod 3, valve stem casing 4, flap 5, valve body 1 is provided with inlet pipe 6 and goes out pipe 7, valve stem casing 4 is arranged on the valve gap 2, and fuse with valve gap 2, flap 5 is arranged on valve rod 3 front ends, valve stem casing 4 is enclosed within on the valve rod 3, valve rod 3 is threaded with valve stem casing 4,4 of valve rod 3 and valve stem casings are provided with sealing cover 8,2 bolts of valve body 1 and valve gap are connected, 1 of valve gap 2 and valve body are with the sealing of " O " type circle, and valve rod 3 is provided with boss 31, as Fig. 2, shown in 3, flap 5 is provided with U-shaped chute 51, valve rod 3 is slidingly connected by U-shaped chute 51 formation that the boss on the valve rod 3 31 snaps on the flap 5 with flap 5, and the inlet pipe 6 connecting end inner chambers and flap 5 heads of valve body 1 are respectively arranged with the conical surface, and valve body 1 contacts by the conical surface with flap 5 and forms back seal, 4 of sealing cover 8 and valve stem casings be with the bonded washer sealing, and 8 of valve rod 3 and sealing covers are provided with two " O " type circles or double-deck " Y " type circle 9 that falls seals.

During work, rotary valve rod 3, valve rod 3 drives flap 5 and moves down, and the conical surface of flap 5 heads contacts with the conical surface of valve body 1 inner chamber and forms back seal, valve closing, 3 valve opens of counterrotating valve rod, as valve rod 3 and valve body 1 decentraction, then because of flap 5 and valve rod 3 are slidingly connected, flap 5 can be adjusted to valve body 1 concentric automatically, reliable sealing when guaranteeing valve closing, the heavy wear of avoiding flap 5 and valve body 1 to cause because of decentraction.Under working state of system, safeguard flap 5, valve rod 3, only need unclamp the connecting bolt of 2 of valve body 1 and valve gaps, valve stem casing 4, valve rod 3 and flap 5 can be safeguarded flap 5, valve rod 3 from valve body 1 interior taking-up as needing.

Refrigeration valve of the present utility model; compact structure; valve body and flap adopt back seal; can under working state of system, safeguard easily valve rod, flap; ask at valve rod and sealing cover and to adopt the sealing of double-layer seal circle, inlet pipe with go out pipe and can directly be connected good seal performance with pipeline welding; the concentricity of flap and valve body can be regulated automatically, and sealing when having guaranteed valve closing and protection flap are avoided the influence of frictional force.

Claims

1. refrigeration valve, has valve body (1), valve gap (2), valve rod (3), valve stem casing (4), flap (5), valve body (1) is provided with inlet pipe (6) and goes out pipe (7), valve stem casing (4) is arranged on the valve gap (2), and fuse with valve gap (2), flap (5) is arranged on valve rod (3) front end, valve stem casing (4) is enclosed within on the valve rod (3), valve rod (3) and valve stem casing (4) are with being threaded, bolt is connected between valve body (1) and valve gap (2), seal with O type circle between valve gap (2) and valve body (1), it is characterized in that: valve rod (3) is provided with boss (31), flap (5) is provided with U-shaped chute (51), valve rod (3) is slidingly connected by U-shaped chute (51) formation that the boss (31) on the valve rod (3) snaps on the flap (5) with flap (5), inlet pipe (6) the connecting end inner chamber of valve body (1) and flap (5) head are respectively arranged with the conical surface, and valve body (1) contacts by the conical surface with flap (5) and forms back seal.

2. refrigeration valve according to claim 1 is characterized in that: be provided with sealing cover (8) between described valve rod (3) and valve stem casing (4), sealing cover (8) is threaded with valve stem casing (4), seals with bonded washer between sealing cover (8) and valve stem casing (4).

3. refrigeration valve according to claim 1 is characterized in that: be provided with two " O " type circle (9) sealings between described valve rod (3) and sealing cover (8).