CN201575163U

CN201575163U - Pneumatic baffle valve

Info

Publication number: CN201575163U
Application number: CN2010200467637U
Authority: CN
Inventors: 樊旗根
Original assignee: KENINGDA INDUSTRY Co Ltd NINGBO; Beijing Zhong Ke San Huan High Tech Co Ltd
Current assignee: KENINGDA INDUSTRY Co Ltd NINGBO; Beijing Zhong Ke San Huan High Tech Co Ltd
Priority date: 2010-01-05
Filing date: 2010-01-05
Publication date: 2010-09-08
Anticipated expiration: 2020-01-05

Abstract

The utility model provides a pneumatic baffle valve of a vacuum furnace. The pneumatic baffle valve comprises a baffle valve seal ring, a valve plate of the baffle valve, a valve body, a valve cover, a cylinder installation base and a cylinder, also comprises a V shaped ring combined seal packing box 35, a valve plate 41 of an auxiliary valve, a seal ring 38 and a O shaped seal ring 39. The V shaped ring combined seal packing box 35 is arranged between a piston rod of a cylinder 37 and a valve cover 34 to realize the seal. The valve plate 41 of the auxiliary valve is installed on the piston rod of the cylinder 37. The seal ring 38 is arranged on the valve plate 41 of the auxiliary valve. The O shaped seal ring 39 is arranged between the valve plate 41 of the auxiliary valve and the piston rod of the cylinder 37. The pneumatic baffle valve of the utility model has the advantages that the sealing performance is good, the service life is long.

Description

A kind of Pneumatic baffle valve

Technical field

The utility model relates to a kind of Pneumatic baffle valve, particularly a kind of Pneumatic baffle valve with auxiliary seal.

Background technique

In the neodymium iron boron industry, vacuum induction melting furnace, vacuum sintering furnace, casting sheet stove all use Pneumatic baffle valve to come the isolated vacuum system.Fig. 1 shows a kind of vacuum equipment system, and as shown in Figure 1, the vacuum equipment system includes: Pneumatic baffle valve, mechanical pump, Roots pump, diffusion pump and vacuum workshop.The structure of Pneumatic baffle valve of the prior art as shown in Figure 2, Pneumatic baffle valve includes: flapper valve seal ring 21, flapper valve valve plate 22, valve body 23, valve gap 24, V-type circle combination seal 25 cylinder fitting seats 26 and cylinder 27.Because the rubber ring combination seal as motive sealing, in use owing to reasons such as wearing and tearing cause seal failure easily, causes vacuum system destroyed, causes product rejection.

The model utility content

The purpose of this utility model is to provide a kind of Pneumatic baffle valve of vacuum furnace, described Pneumatic baffle valve comprises flapper valve seal ring, flapper valve valve plate, valve body, valve gap, cylinder fitting seat and cylinder, also comprise V-type circle combination seal Stuffing box, Auxiliary valves valve plate, seal ring and O RunddichtringO, wherein:

Described V-type circle combination seal Stuffing box is arranged between the piston rod of cylinder and the valve gap to realize sealing;

Described Auxiliary valves valve plate is installed on the piston rod of cylinder;

Described seal ring is arranged on the Auxiliary valves valve plate;

Described O RunddichtringO sealing is arranged between the piston rod of Auxiliary valves valve plate and cylinder.

Preferably, described Auxiliary valves valve plate is installed on the piston rod of cylinder by pin.

Preferably, described V-type circle combination seal Stuffing box comprises filler casing, following Stuffing box and last Stuffing box.

Preferably, be disposed with support ring, canvas filler rubber v-ring, synthetic rubber v-ring, canvas filler rubber v-ring and pressure ring from top to bottom in the described following Stuffing box, fix and compress by Stuffing box screw thread protecting cover;

Preferably, described going up in the Stuffing box is disposed with support ring, canvas filler rubber v-ring, synthetic rubber v-ring, canvas filler rubber v-ring, pressure ring, spring and spring pressure ring from lower to upper, fixes and compresses by the Stuffing box protecting cover.

Pneumatic baffle valve of the prior art only has a seal arrangement, because the sealing device belongs to motive sealing, therefore is easy to lose efficacy because of wearing and tearing, causes vacuum system destroyed, causes product rejection.And Pneumatic baffle valve provided by the utility model has two seal arrangements simultaneously, makes Pneumatic baffle valve keep sealing state under the acting in conjunction of two seal arrangements, plays " dual fail-safe " effect.Even V-type circle combination seal lost efficacy because of wearing and tearing like this, auxiliary sealing device also can play seal action, and Pneumatic baffle valve still can keep sealing state.Simultaneously, auxiliary sealing device adopts the mode of plane contact to seal, and it is little that this sealing means has surface friction drag, the non-damageable advantage of seal arrangement.Therefore, Pneumatic baffle valve provided by the utility model has the advantage of favorable sealing property, long service life.

Description of drawings

Fig. 1 is the schematic representation of a kind of vacuum equipment system;

Fig. 2 a is the schematic representation of Pneumatic baffle valve of the prior art when being in closed condition;

Fig. 2 b is the schematic representation of Pneumatic baffle valve of the prior art when being in opening state;

Fig. 3 a is the schematic representation of Pneumatic baffle valve of the present utility model when being in closed condition;

Fig. 3 b is the schematic representation of Pneumatic baffle valve of the present utility model when being in opening state;

Fig. 4 is the V-type circle combination seal Stuffing box of Pneumatic baffle valve of the present utility model.

Description of reference numerals is as follows:

Flapper valve seal ring 31, flapper valve valve plate 32, valve body 33, valve gap 34, Stuffing box 35, cylinder fitting seat 36, cylinder 37, seal ring 38, O RunddichtringO 39, pin 40, Auxiliary valves valve plate 41, Stuffing box screw thread protecting cover 501, pressure ring 502, canvas filler rubber v-ring 503, synthetic rubber v-ring 504, canvas filler rubber v-ring 505, support ring 506, pressure ring 507, spring 508, spring pressure ring 509, Stuffing box protecting cover 510, filler casing 514.

Embodiment

For making your auditor can further understand structure of the present utility model, feature and other purposes, now be described in detail as follows in conjunction with appended preferred embodiment, illustrated preferred embodiment only is used to illustrate the technical solution of the utility model, and non-limiting the utility model.

Shown in Fig. 3 a and Fig. 3 b, Fig. 3 a is the schematic representation of Pneumatic baffle valve of the present utility model when being in closed condition; Fig. 3 b is the schematic representation of Pneumatic baffle valve of the present utility model when being in opening state.By Fig. 3 a and Fig. 3 b as can be seen, the Pneumatic baffle valve of vacuum furnace provided by the utility model comprises flapper valve seal ring 31, flapper valve valve plate 32, valve body 33, valve gap 34, cylinder fitting seat 36 and cylinder 37, and this Pneumatic baffle valve also comprises V-type circle combination seal Stuffing box 35, Auxiliary valves valve plate 41, seal ring 38 and O RunddichtringO 39.Wherein, V-type circle combination seal Stuffing box 35 is arranged between the piston rod of cylinder 37 and the valve gap 34 to realize sealing; Auxiliary valves valve plate (41) is installed on the piston rod of cylinder 37; Seal ring 38 is arranged on the Auxiliary valves valve plate 41; O RunddichtringO sealing 39 is arranged between the piston rod of Auxiliary valves valve plate 41 and cylinder 37.

Shown in Fig. 2 a and Fig. 2 b, Fig. 2 a is the schematic representation of Pneumatic baffle valve of the prior art when being in closed condition; Fig. 2 b is the schematic representation of Pneumatic baffle valve of the prior art when being in opening state.Comparison diagram 3a, Fig. 3 b and Fig. 2 a, Fig. 2 b as can be seen, the important difference of Pneumatic baffle valve provided by the utility model and Pneumatic baffle valve of the prior art is that Pneumatic baffle valve of the present utility model also has auxiliary sealing device.

Shown in Fig. 3 b, when drawback movement is done in the driving that is activated device (for example cylinder) when piston rod (be expressed as in Fig. 3 b and move upward), Auxiliary valves valve plate 41 is also done drawback movement thereupon; When Auxiliary valves valve plate 41 moved to behind the lower surface of valve gap 34, under the effect of drive unit backhaul pressure, the seal ring 38 on the Auxiliary valves valve plate 41 was combined closely with the lower surface of valve gap 34 or Stuffing box 35, thereby plays seal action.38 pairs of Pneumatic baffle valves of seal ring on V-type circle combination seal and the Auxiliary valves valve plate 41 have played the double seal effect like this.Because the seal ring 38 on the Auxiliary valves valve plate 41 adopts the mode of plane contact to seal, and is therefore not fragile, has favorable durability.

Move with flapper valve operating handle 44 in order to ensure Auxiliary valves valve plate 41, and withstand backhaul pressure, Auxiliary valves valve plate 41 preferably is fixedly mounted on the flapper valve operating handle 44.Auxiliary valves valve plate 41 can be welded on the flapper valve operating handle 44, also can Auxiliary valves valve plate 41 be fixed on the flapper valve operating handle 44, can also Auxiliary valves valve plate 41 be fixed on the flapper valve operating handle 44 by pin 40 by bolt.The utility model preferably uses pin 40 to fix Auxiliary valves valve plate 41, compares with bolt, and pin has the accurate more advantage in location.

Fig. 4 is the V-type circle combination seal Stuffing box of Pneumatic baffle valve of the present utility model.As shown in Figure 4, as of the present utility model preferred embodiment a kind of, V-type circle combination seal Stuffing box 35 comprises filler casing 514, following Stuffing box and last Stuffing box.Wherein, be disposed with support ring 506, canvas filler rubber v-ring 505, synthetic rubber v-ring 504, canvas filler rubber v-ring 503 and pressure ring 502 in the following Stuffing box from top to bottom, fix and compress by Stuffing box screw thread protecting cover 501; Be disposed with support ring 506, canvas filler rubber v-ring 505, synthetic rubber v-ring 504, canvas filler rubber v-ring 503, pressure ring 507, spring 508 and spring pressure ring 509 in the last Stuffing box from lower to upper, fix and compress by Stuffing box protecting cover 510.

What need statement is that above-mentioned model utility content and embodiment are intended to prove the practical application of technological scheme that the utility model provides, and should not be construed as the qualification to the utility model protection domain.Those skilled in the art are in spirit of the present utility model and principle, when doing various modifications, being equal to and replacing or improve.Protection domain of the present utility model is as the criterion with appended claims.

Claims

1. the Pneumatic baffle valve of a vacuum furnace, described Pneumatic baffle valve comprises flapper valve seal ring (31), flapper valve valve plate (32), valve body (33), valve gap (34), cylinder fitting seat (36) and cylinder (37),

It is characterized in that, also comprise V-type circle combination seal Stuffing box (35), Auxiliary valves valve plate (41), seal ring (38) and O RunddichtringO (39), wherein:

Described V-type circle combination seal Stuffing box (35) is arranged between the piston rod of cylinder (37) and the valve gap (34) to realize sealing;

Described Auxiliary valves valve plate (41) is installed on the piston rod of cylinder (37);

Described seal ring (38) is arranged on the Auxiliary valves valve plate (41);

Described O RunddichtringO sealing (39) is arranged between the piston rod of Auxiliary valves valve plate (41) and cylinder (37).

2. Pneumatic baffle valve according to claim 1 is characterized in that, described Auxiliary valves valve plate (41) is installed on the piston rod of cylinder (37) by pin (40).

3. Pneumatic baffle valve according to claim 1 is characterized in that, described V-type circle combination seal Stuffing box (35) comprises filler casing (514), following Stuffing box and last Stuffing box.

4. Pneumatic baffle valve according to claim 3, it is characterized in that, be disposed with support ring (506), canvas filler rubber v-ring (505), synthetic rubber v-ring (504), canvas filler rubber v-ring (503) and pressure ring (502) from top to bottom in the Stuffing box under described, fix and compress by Stuffing box screw thread protecting cover (501).

5. Pneumatic baffle valve according to claim 3, it is characterized in that, described going up in the Stuffing box is disposed with support ring (506), canvas filler rubber v-ring (505), synthetic rubber v-ring (504), canvas filler rubber v-ring (503), pressure ring (507), spring (508) and spring pressure ring (509) from lower to upper, fixes and compresses by Stuffing box protecting cover (510).