CN203348636U

CN203348636U - Four-position three-way double-valve-element vacuum valve

Info

Publication number: CN203348636U
Application number: CN 201320271371
Authority: CN
Inventors: 吴卫岭
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-05-17
Filing date: 2013-05-17
Publication date: 2013-12-18
Anticipated expiration: 2023-05-17

Abstract

The utility model discloses a four-position three-way double-valve-element vacuum valve, and belongs to the technical field of valves. The four-position three-way double-valve-element vacuum valve comprises a valve body, wherein two communicated cavities are formed in the valve body, namely a left cavity and a right cavity, the left cavity is communicated with the outside through an air pumping port, the right cavity is communicated with the outside through an air exhaust port and a working port, an air pumping connecting rod capable of sliding along the left cavity is arranged in the left cavity, and an air exhaust connecting rod capable of sliding along the right cavity is arranged in the right cavity. The four-position three-way double-valve-element vacuum valve achieves detection on sealing performance of a tank body through two valve rods, three passages and four positions, a planar sealing method is adopted between the valve rods, double sealing is achieved through spring pressure and the negative pressure of the vacuum valve, a negative pressure state can be kept for a long time, the sealing effect is improved, and the service life is prolonged.

Description

A kind of four threeway double spool vacuum valves

Technical field

The utility model relates to a kind of four position three-way valves, belongs to valve technology field, especially a kind of four threeway double spool vacuum valves for leak tester tank body sealing propertytest.

Background technique

In the sealing propertytest operation of sealed shell of tank, while by vacuum pump, making the inner pressure relief of tank body, between the stream that these vacuum tanks are connected with vacuum pump, connecting vacuum valve, open and close stream and detect sealing effect by this vacuum valve.

Vacuum valve, by propellant is supplied with to one-sided valve chamber, just can drive at one-sided use spring, and while not supplying with propellant, vacuum valve just becomes closed condition.Therefore, for disconnecting at power supply and gas while extracting out, by closing vacuum valve, with the situation towards the secure side action.

When traditional leak tester detects the sealing of packing bottle or canister, need to carry out continuously one by one sealing detection to packing bottle, packing bottle be vacuumized, and continue for some time, judge whether packing bottle exists leakage.The tradition leak tester generally comprises sourceof negative pressure and rotating disk, several holes are set on rotating disk, these holes are communicated with sourceof negative pressure with packing bottle, and sealing gasket is set on rotating disk, its specific works process is, by front star-wheel, packing bottle is delivered to rotating disk, then by magnet, container is firmly held, and by vacuum pump, is vacuumized, make in packing bottle to produce negative pressure, realize detecting its sealing.In this device when keeping negative pressure state, need to guarantee between packing bottle and rotating disk, the sealing between rotating disk and vacuum pump, the general seal disc that adopts is realized, this seal disc leans on the end-face friction in hole to vacuumize and keeps pressure, because there are wearing and tearing in long-term the use, affect the working life of equipment, be easy to produce pressure leakage at the rotating disk place, can not guarantee the accuracy detected.

In addition, in traditional leak tester, detecting the place, hole at each is all directly with sourceof negative pressure, to be communicated with, and centre does not arrange control valve, and when a hole gas leakage, whole equipment can not be used, and affects detection efficiency.

The model utility content

The technical problems to be solved in the utility model is to provide a kind of four threeway double spool vacuum valves, this equipment adopts double stub shaft, triple channel, four sealing propertytests of realizing tank body, adopt plane sealing between valve rod, increase sealing effect, improve working life simultaneously.

For solving the problems of the technologies described above, technical solution adopted in the utility model is: a kind of four threeway double spool vacuum valves, it is characterized in that comprising valve body, be provided with two in described valve body and be communicated with cavity, be respectively left cavity and right cavity, described left cavity is in communication with the outside by bleeding point, and right cavity is in communication with the outside by relief opening and working hole, be provided with the connecting rod of bleeding that can slide along left cavity in left cavity, be provided with the exhaust connecting rod that can slide along right cavity in right cavity.

Said structure is described further, the described connecting rod sleeve of bleeding is connected to the bleed valve seat fixing with valve body, the bleed below of connecting rod is provided with the seal disc seat, embed the air extracting seal dish around the contact segment of described seal disc seat and the connecting rod of bleeding, the upper surface of air extracting seal dish embedding sealing dish seat, seal disc seat lower end is provided with the spring for resetting.

Said structure is described further, and the described small end of bleeding is positioned at the valve body outside, and at the small end of bleeding, upper roller is set.

Said structure is described further, and described exhaust connecting rod below is provided with delivery valve seat, and exhaust connecting rod and delivery valve seat surface of contact are provided with the vent seal dish, and the vent seal dish embeds the lower surface of exhaust connecting rod.

Said structure is described further, described delivery valve seat lower surface is provided with blind hole, be provided with the bottom roller that can slide along blind hole in described blind hole, between bottom roller and blind hole bottom, be provided with spring, exhaust connecting rod and bottom roller two auxiliary connecting rods by side structure that is fixed as one.

Said structure is described further, between described cavity and connecting rod, is provided with O-ring seal.The sealing circle can improve the sealing effect of valve inner, prevents vacuum leak, even if there is leakage also can not affect the vacuum state of plane sealing dish and detected material, thereby can maintain under long negative pressure and air tight, improves the sealing detection precision.

Two valve rods in the utility model are connecting rod and the exhaust connecting rod of bleeding, and each valve rod all adopts plane sealing, and when pressure is larger, sealing better.Bleed connecting rod and exhaust connecting rod in the utility model are all to realize resetting by spring, press down the upper roller pressurization, the pressure release of jack-up bottom roller.In addition, at valve rod one end, roller is set, can coordinates with roller on the gradually inclined inclined-plane by projection, complete valve rod along the sliding up and down of valve body, can coordinate with rotating disk, realize quick, lasting tank body sealing propertytest.

The beneficial effect that adopts technique scheme to produce is: the utility model is by arranging two parallel valve rods in valve body, four positions of two valve rods, there are three ventilating holes in valve body and the external world, form the main structure of vacuum valve, wherein on valve rod, establish dihedral seal disc, its arranged direction is vertical with cavity, and, on the face of bleeding, when vacuumizing, utilize negative pressure and spring to realize the double seal in cavity, the permanent negative pressure state that keeps, can increase the service life greatly; And the structural configuration mode of this vacuum valve, make when vacuumizing, and the degree of vacuum of taking out is higher, and sealing effect is better.

The accompanying drawing explanation

Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.

Fig. 1 is structural representation of the present utility model;

Fig. 2 is A-A sectional view in Fig. 1;

Fig. 3 is B-B sectional view in Fig. 2;

Fig. 4 is the use phase diagram of the utility model for leak tester;

To be the utility model add the structural representation of release by inclined raceway gradually to Fig. 5;

Wherein: 1, upper roller, 2, bottom roller, 3, the exhaust connecting rod, 4, relief opening, 5, working hole, 6, the vent seal dish, 7, spring, 8, the air extracting seal dish, 9, bleeding point, 10, the connecting rod of bleeding, 11, auxiliary connecting rod, 12, rotating disk, 13, arc groove, 14, the venting inclined-plane, 15, the inclined-plane of bleeding, 16, seal disc seat, 17, the valve seat of bleeding, 18, delivery valve seat.

Embodiment

Known with reference to the accompanying drawings, the utility model is specifically related to a kind of four threeway double spool vacuum valves, for the detection of leak tester tank body sealing.

In attached Fig. 1 and 2, can find out, the utility model concrete structure comprises valve body, be provided with two in valve body and be communicated with cavity, be respectively left cavity and right cavity, left cavity is in communication with the outside by bleeding point 9, and right cavity is in communication with the outside by relief opening 4 and working hole 5, be provided with the connecting rod 10 of bleeding that can slide along left cavity in left cavity, be provided with the exhaust connecting rod 3 that can slide along right cavity in right cavity.

In the utility model, bleeding point 9 is communicated with vacuum pump or sourceof negative pressure, and working hole 5 is communicated with container to be detected, and relief opening 4 is in communication with the outside, for rush down the negative pressure of receptacle when detection is complete.

Wherein, in accompanying drawing 2, can see, the outer valve seat 17 of bleeding of fixing with valve body that is socketed with of the connecting rod 10 of bleeding, the bleed below of connecting rod 10 is provided with seal disc seat 16, embed air extracting seal dish 8 around the contact segment of seal disc seat 16 and the connecting rod 10 of bleeding, the upper surface of air extracting seal dish 8 embedding sealing dish seats 16, seal disc seat 16 lower ends are provided with the spring 7 for resetting.Connecting rod 10 upper ends of bleeding are positioned at the valve body outside, and in connecting rod 10 upper ends of bleeding, upper roller 1 are set.

Exhaust connecting rod 3 belows are provided with delivery valve seat 18, and exhaust connecting rod 3 and delivery valve seat 18 surface of contact are provided with vent seal dish 6, and vent seal dish 6 embeds the lower surface of exhaust connecting rod 3.Delivery valve seat 18 lower surfaces are provided with blind hole, are provided with the bottom roller 2 that can slide along blind hole in blind hole, between bottom roller 2 and blind hole bottom, are provided with spring 7, exhaust connecting rod 3 and bottom roller 2 two auxiliary connecting rods 11 by side structure that is fixed as one.Auxiliary connecting rod 11 is distributed in the both sides of exhaust connecting rod 3, and the flat board of auxiliary connecting rod 11 by two ends is fixed as square, and exhaust connecting rod 3 and bottom roller 2 are formed to an integral body, as shown in Figure 3, in cavity is arranged, slides up and down, and realizes pressurization and rushes down pressure.

Accompanying drawing 4 is applied in leak tester the use phase diagram in the inspection instrument sealing for the utility model, the utility model is distributed on rotating disk 12, left cavity is communicated with vacuum source by bleeding point 9, right cavity is in communication with the outside with working hole 5 and is communicated with detected object by relief opening 4, feed tank body to be detected by arc groove 13 to rotating disk, first hold tank body by the magnet in rotating disk 12 rubber seal dishes, then the inclined-plane 15 of bleeding of gradual change presses down upper roller 1 and forms negative pressure, the rear tank body in the inclined-plane 15 of bleeding that leaves gradual change keeps negative pressure state, in the hermetically sealed can rotation process, whether can detect hermetically sealed can by sensor leaks gas, after hermetically sealed can circles along with rotating disk, after 2 venting of top bottom roller on the venting inclined-plane 14 on gradual change inclined-plane, arc groove 13 by opposite side unloads hermetically sealed can.Be that rotating disk forwards to while vacuumizing working position by the gradual change inclined-plane and presses down upper roller 1, start to take out the air of receptacle, leave the gradual change inclined-plane and keep vacuum pressure; Venting inclined-plane 14 jack-up bottom roller 2 pressure releases on face gradual change inclined-plane on the lower when rotating disk forwards the pressure release position to, leave the pressure release of gradual change inclined-plane complete, after rushing down pressure, detected tank body is removed by arc groove 13, then the arc groove 13 of opposite side is inserted new tank body to be checked, and the inclined-plane 15 of bleeding on the gradual change inclined-plane of opposite side presses down upper roller 1, realizes pressurization, circular movement is realized continuous automatic operation, as shown in Figure 5.

The utility model adopts double stub shaft, triple channel, four positions to realize the sealing propertytest of tank body, and owing to adopting the plane sealing principle, greatly extend working life.The structural design of vacuum valve, make when vacuumizing, and the degree of vacuum of taking out is higher, and sealing effect is better.

Claims

1. one kind four threeway double spool vacuum valves, it is characterized in that comprising valve body, be provided with two in described valve body and be communicated with cavity, be respectively left cavity and right cavity, described left cavity is in communication with the outside by bleeding point (9), right cavity is in communication with the outside by relief opening (4) and working hole (5), is provided with the connecting rod of bleeding (10) that can slide along left cavity in left cavity, is provided with the exhaust connecting rod (3) that can slide along right cavity in right cavity.

2. a kind of four threeway double spool vacuum valves according to claim 1, it is characterized in that the outer valve seat of bleeding (17) of fixing with valve body that is socketed with of the described connecting rod of bleeding (10), the bleed below of connecting rod (10) is provided with seal disc seat (16), embed air extracting seal dish (8) around the contact segment of described seal disc seat (16) and the connecting rod of bleeding (10), the upper surface of air extracting seal dish (8) embedding sealing dish seat (16), seal disc seat (16) lower end is provided with the spring (7) for resetting.

3. a kind of four threeway double spool vacuum valves according to claim 2, is characterized in that the described connecting rod of bleeding (10) upper end is positioned at the valve body outside, and in the connecting rod of bleeding (10) upper end, upper roller (1) be set.

4. a kind of four threeway double spool vacuum valves according to claim 1, it is characterized in that described exhaust connecting rod (3) below is provided with delivery valve seat (18), exhaust connecting rod (3) and delivery valve seat (18) surface of contact are provided with vent seal dish (6), and vent seal dish (6) embeds the lower surface of exhaust connecting rod (3).

5. a kind of four threeway double spool vacuum valves according to claim 4, it is characterized in that described delivery valve seat (18) lower surface is provided with blind hole, be provided with the bottom roller (2) that can slide along blind hole in described blind hole, bottom roller (2) and blind hole are provided with spring (7) between bottom, exhaust connecting rod (3) and bottom roller (2) two auxiliary connecting rods (11) by the side structure that is fixed as one.

6. a kind of four threeway double spool vacuum valves according to claim 1, is characterized in that being provided with O-ring seal between described cavity and connecting rod (3,10).