CN1047830C

CN1047830C - Multi-layer sealed explosion-proof safety valve with vibration leakage way

Info

Publication number: CN1047830C
Application number: CN97106284A
Authority: CN
Inventors: 陈联芝; 俞伯兴
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-02-20
Filing date: 1997-02-20
Publication date: 1999-12-29
Anticipated expiration: 2017-02-20
Also published as: CN1165263A

Abstract

The present invention relates to a multi-layer sealed anti-explosion relief valve with a vibration leakage mode, which comprises a three-way valve seat, a first control valve and a second control valve, wherein the first control valve and the second control valve are arranged on the three-way valve seat. The present invention is characterized in that a plurality of guide posts are arranged between the inner cavity wall of a valve body of the first control valve and a valve core; the valve core is composed of a plurality of valve sheets; a plurality of guide holes through which the guide posts can pass are arranged on each valve sheet so that all of the valve sheets are coaxially superposed; the upper end plane of each valve sheet outside the upper valve sheet is symmetrically provided with lug bosses and through holes, and the lug bosses are axially aligned with the through holes; the number of the lug bosses and the through holes is even and decreases from bottom to top in a doubling mode; the second control valve is provided with an overload safety sheet. The present invention has the advantage that all of the valve sheets can leak in a vibration mode so that the reliable and safe pressure control can be obtained.

Description

Multi-layer sealed explosion relief valve with vibration leakage way

The present invention relates to a kind of Direct spring loaded safety valve, relate to a kind of Direct spring loaded safety valve specifically by seal leakage.

The spool of the Direct spring loaded safety valve that generally uses all is the structure that adopts standstill seal and balanced type take-off usually at present; owing to expand with heat and contract with cold, spring is malfunctioning and the problem of aspect such as quality of fit usually can cause the balance take-off malfunctioning and do not leak, and therefore can not guarantee to control gas, hydraulic coupling in order to avoid equipment explosion damages reliable and securely.

Therefore, the purpose of this invention is to provide a kind of safe and reliable explosion relief valve of controlling gas, hydraulic coupling by sealing with dynamic leakage mode.

For achieving the above object, the invention provides a kind of multi-layer sealed explosion relief valve with vibration leakage way, it comprises: one has the threeway valve seat of two first flanges that are set up in parallel and second flange; One first control valve, it comprises that one is installed on described first flange hermetically and contains with first valve body of first inner chamber of described threeway valve seat intracavity inter-connection, stretches into one first valve rod in the described inner chamber and be arranged in first inner chamber and be set in one first spool on the described valve rod inserting end along described center line along a vertical center line of described first inner chamber; One second control valve, it comprises: second valve body of being made up of upper and lower flange and the wall portion that is formed with one second inner chamber between them, described lower flange is installed on described second flange hermetically, described second inner chamber and described threeway valve seat intracavity inter-connection; One is installed in the valve gap on the described upper flange; One stretches into second valve rod in second inner chamber and relatively is arranged on second spool in second inner chamber along described center line and described valve rod along a vertical center line of second inner chamber by described valve gap; Be characterized in, between the wall of described first inner chamber and described spool, be provided with a plurality of guide pillars, described first spool is made up of a plurality of valve block of the supreme valve block of bottom valve sheet, in described bottom valve sheet and on the periphery of all the other each valve blocks, be provided with a plurality of guide holes, each guide pillar passes each guide hole accordingly respectively so that described valve block is stacked along described center line from bottom to up, described bottom valve sheet is embedded between described threeway valve seat flange and main valve body flange, outer all the other each valve blocks of last valve block they with the oppositely relative face of described flanged surface on leave on the equal diameter circumference of center line certain distance and be provided with symmetrical layout and the even number boss and the perforation of aligning up and down, its the number on each valve block from down and on successively decrease in pairs, the periphery of each valve block that the bottom valve sheet is outer forms the taper anchor ring that dwindles downwards; The stepped shaft inner chamber of described second inner chamber for forming by a loculus of big chamber on top and bottom, the upper end of described loculus forms a cone-shape seat surface, described second spool has a upper end portion, one underpart and a truncated cone portion between them, described second spool is located on the described taper anchor ring by described truncated cone portion, described valve gap is provided with more than one through hole, described second control valve comprises that also one is embedded the safety plate between described valve gap and described upper flange, is formed with a plurality of weak points relative with described through hole on it; The top board that a plurality of and described weak point matches and is provided with; Many its upper ends are positioned on the described top board and the bearing pin of the upper end bolt of its lower end and described spool.

Adopt the advantage of such scheme of the present invention to be: because the spool of a control valve wherein is made up of a plurality of valve blocks, each valve block is provided with the pressure fluid Leak hole of different numbers, thereby makes each valve block be subjected to different pressure; In case described valve block just formed the state and the unlatching of Lever type ground of multilayer vibrations when suffered pressure surpassed the limiting value of setting, thereby the spool of many valve blocks of the present invention is thereby that a kind of dynamic sealing can form effective leakage to obtain reliable and secure pressure control, so just overcome the shortcoming of the balanced type standstill seal of original Direct spring loaded safety valve; In addition, because described second control valve has adopted safety plate and top board structure combining, when therefore even first control valve unexpectedly lost efficacy when superpressure takes place, so that the weak point of safety plate top is worn pressure fluid is flowed out thereby the pressure fluid that acts on the superpressure of second spool just acts on top board by described bearing pin from the through hole of valve gap, therefore just can obtain to be perfectly safe reliable pressure control in case equipment be damaged.

To specify purpose of the present invention and characteristics by a preferred embodiment and in conjunction with its accompanying drawing below.

Fig. 1 is the main sectional view of a preferred embodiment of the present invention assembly;

Fig. 2 is the plane view of bottom valve sheet of Fig. 1 embodiment's first control valve:

Fig. 3 is the sectional view of being got along the A-A line among Fig. 2;

Fig. 4 is the plane view of second valve block of Fig. 1 embodiment's first control valve;

Fig. 5 is the sectional view of being got along the B-B line among Fig. 4;

Fig. 6 is the plane view of the 3rd valve block of Fig. 1 embodiment's first control valve;

Fig. 7 is the sectional view of being got along the C-C line among Fig. 6;

Fig. 8 is the plane view of the 4th valve block of Fig. 1 embodiment's first control valve:

Fig. 9 is the sectional view of being got along the D-D line among Fig. 8;

Figure 10 is the plane view of last valve block of Fig. 1 embodiment's first control valve;

Figure 11 is the sectional view of being got along the E-E line of Figure 10;

Figure 12 is the main sectional view of Fig. 1 embodiment's second control valve body;

Figure l3 is the plane view of valve gap of Fig. 1 embodiment's second control valve:

Figure 14 is the plan view through biopsy cavity marker devices of spool of Fig. 1 embodiment's second control valve;

Figure 15 is the worm's eye view of Figure 14;

Figure 16 is the plane view of safety plate of Fig. 1 embodiment's second control valve;

Figure 17 is the sectional view of being got along the F-F line among Figure 16;

Figure 18 is the plane view of top board of Fig. 1 embodiment's second control valve;

Figure 19 is the sectional drawing of being got along the G-G line among Figure 18.

As scheme shown in the l, the present invention is made up of a threeway valve seat 12, one first control valve and one second control valve.Described first control valve comprises: one first valve body is a main valve body 32, it is installed on first flange 13 of described threeway valve seat by flange 33 and sealing gasket 11, described first valve body 32 has one first inner chamber, its opening is relative with the opening of inner chamber on first flange of threeway valve seat 12, and it has one first center line 36 in vertical direction; One guide sleeve 30, it is embedded on the upper wall 35 of described valve body along described center line 36; One spring shield 3l, it is installed on the upper wall 35 along center line 36: a cover cap 25, it is fixed in outside the upper end of spring shield 31; One spring adjusting screw rod cover 26, it is arranged in the upper end of spring shield 31 along described center line 36, and its lower end is stretched in the inner chamber of spring shield 31; One adjusts nut 24, and it is arranged on the outside thread wall of cover 26 so that will overlap on 26 end faces that are fixed on after adjusting on the spring shield; One first valve rod 23, the inner chamber of its endoporus by described spring adjusting screw rod cover 26, spring shield 31 and the endoporus of described guide sleeve 30 also extend in first inner chamber of first valve body 32; One first spool, it comprises from bottom to up along five stacked valve blocks 20 of described first center line, 36 correspondences, 19,18,17 and 16, as shown in Fig. 2 to 11, wherein in bottom valve sheet 20 with on the periphery of all the other each valve blocks 16 to 19, be respectively equipped with four relative guide holes 37, four guide pillars 15 plug in the into corresponding guide hole 37 so that each valve block 20 along the internal chamber wall of first valve body 32,19,18,17 and 16 is stacked along described first center line from bottom to up, bottom valve sheet 20 wherein is embedded between first flange 13 and main valve body flange 33 of threeway valve seat 12, shown in Fig. 2 to 11, except that last valve block 16, each

valve block

20,19,18 and 17 the reverse opposing end faces of end face at itself and described flange 33, be that the equal diameter circumference that leaves the center certain distance on the upper-end surface 40 is provided with the even number boss of aiming at up and down 38 of symmetrical layout and perforation 39 accordingly, its the number on each valve block from down and on successively decrease in pairs, for example, in the present embodiment, bottom valve sheet 20 to the valve block 17 boss 38 and the number of perforation 39 be respectively 8,6,4 and 2, the lower end surface of each valve block 16 to 20 is the plane, and the periphery of each valve block except that bottom valve sheet 20 all forms the taper anchor ring 52 that dwindles downwards; Last valve block 16 as shown in figure 11, axially upwards forms a jut 38 and forms a center apical pore 39 from the coaxial line ground, upper-end surface of described jut along center line, is used to overlap the lower end of top first valve rod 23; Described second control valve comprises one second valve body 10, as shown in figure 12, it be one by big chamber 39, a top and the stepped shaft inner chamber that bottom loculus 40 is formed, the upper end of described loculus 40 forms a conical ring seat surface 41; One second spool 9, as shown in figure 14, have a upper end portion 42, a underpart 43 and a truncated cone portion 44 between them, described second spool 9 is located on the described conical ring seat surface 41 by described truncated cone portion 44, and described upper end portion is provided with an apical pore 49 and a plurality of (being two in the present embodiment) screw 50; One valve gap 5, as figure 2.- shown in, be provided with more than one, for example be two through hole 45 in the present embodiment; One is embedded the safety plate 6 between the upper flange 46 of the described valve gap 5 and second valve body 10, shown in Figure 16 and 17, described safety plate 6 is formed with relative with described through hole 45 (seeing Figure 13) a plurality of, for example be four weak point 47 in the present embodiment, they are divided into centrosymmetric two groups of two twenty percents, and one group of incense is wherein used; With described weak point 47 match and be provided with a plurality of, for example be two top board 7 in the present embodiment, as shown in figure 19, each top board is provided with a pin shaft hole 48; One second valve rod 3 passes valve gap 5, safety plate 6 and stretches into the inner chamber of second valve body and relative with apical pore 49 at spool 9, the part of second valve rod 3 is the screw section, described screw section be arranged on a support 4 on nut 2 mutually spiral shell join, its end is installed with a handwheel 1, can adjust the stroke that second valve rod 3 stretches into inner chamber by handwheel 1; Many (for example being two in the present embodiment) bearing pins 8, its upper end is plugged in the pin-and-hole 48 of top board, and its lower end is provided with upper end screw 50 bolts of screw thread and described spool 9.

Specify the working principle and the safety control process of the explosion relief valve of this many sealings with vibration leakage formula of the present invention below.

Hydrodynamic pressure in equipment that is connected with threeway valve seat 12 or the system (not shown) acts on respectively by threeway valve seat 12 on the lower end surface of the bottom valve sheet 20 of first spool and second spool 9 and the perforation 39 by bottom valve sheet 20, because the perforation 39 of bottom valve sheet 20 supreme valve blocks 16 is aimed at and the number of boring a hole is to reduce in couples vertically, therefore a part of pressure fluid flows out from perforation aligned with each other respectively, and another part pressure fluid then flows out the out-of-alignment perforation between neighbouring valve block; Because each is unequal for the suffered pressure of each valve block, therefore, in case when the pressure in system or the equipment surpassed the force value of regulation, the state that forms vibrations thereby each valve block just overcomes the active force of spring 28 made that part of pressure fluid that flows out from out-of-alignment perforation from gap outflow the facilitating leakage between first internal chamber wall of the gap between boss 38 surfaces and stacked last lower valve and the described taper anchor ring 41 and first valve body 32; Like this, just the sealing of original state type can be changed into dynamic seal (packing), the opening ways of the balanced type of original spool is changed over the mode that each valve block is opened around the Lever type of guide pillar, thereby guarantee security leak.Because the structure that second control valve of the present invention has adopted top board and safety plate to match, even first control valve unexpectedly lost efficacy, second control valve also can guarantee security leak, its working procedure is as follows: as mentioned above, when first control valve unexpectedly lost efficacy, the overload hydrodynamic pressure that acts on second spool 9 is just upwards worn from the seat surface 41 of second valve body 10 and by bearing pin 8 and top board 7 spool 9 on the top with 47 tops of the weak point on the safety plate 6, thereby pressure fluid is leaked out from the through hole 45 relative with described weak point 47 on valve gap 5.Like this, safety valve of the present invention just can be realized cocksure safe insurance function by the effective leakage effects of second control valve.

Claims

1. multi-layer sealed explosion relief valve with vibration leakage way, it comprises: one has the threeway valve seat of two juxtaposed first flanges and second flange; One first control valve, it comprises that one is installed on described first flange hermetically and contains with first valve body of first inner chamber of described threeway valve seat intracavity inter-connection, stretches into one first valve rod in the described inner chamber and be arranged in first inner chamber and be set in one first spool on the described valve rod inserting end along described center line along a vertical center line of described first inner chamber; One second control valve, it comprises: second valve body of being made up of upper and lower flange and the wall portion that is formed with one second inner chamber between them, described lower flange is installed on described second flange hermetically, described second inner chamber and described threeway valve seat intracavity inter-connection; One is installed in the valve gap on the described upper flange; One stretches into second valve rod in second inner chamber and relatively is arranged on second spool in second inner chamber along described center line and described valve rod along a vertical center line of second inner chamber by described valve gap; It is characterized in that, between the wall of described first inner chamber and described spool, be provided with a plurality of guide pillars, described first spool is made up of a plurality of valve block of the supreme valve block of bottom valve sheet, in described bottom valve sheet and on the periphery of all the other each valve blocks, be provided with a plurality of guide holes, described each guide pillar passes described each guide hole respectively accordingly so that described valve block is stacked along described center line from bottom to up, described bottom valve sheet is embedded between described threeway valve seat flange and main valve body flange, outer all the other each valve blocks of last valve block they with the oppositely relative face of described flanged surface on leave the even number boss and the perforation of aligning up and down that is provided with symmetrical layout on the equal diameter circumference of center line certain distance, its the number on each valve block from down and on successively decrease in pairs, the periphery of each valve block that the bottom valve sheet is outer forms the taper anchor ring that dwindles downwards; The stepped shaft inner chamber of described second inner chamber for forming by a loculus of big chamber on top and bottom, the upper end of described loculus forms a cone-shape seat surface, described second spool has a upper end portion, one underpart and a truncated cone portion between them, described second spool is located on the described taper anchor ring by described truncated cone portion, described valve gap is provided with more than one through hole, described second control valve comprises that also one is embedded the safety plate between described valve gap and described upper flange, is formed with a plurality of weak points relative with described through hole on it; The top board that a plurality of and described weak point matches and is provided with; Many its upper ends are positioned on the described top board and the bearing pin of the upper end bolt of its lower end and described spool.

2. explosion relief valve as claimed in claim 1 is characterized in that, the number of described guide pillar and guide hole is respectively four.

3. explosion relief valve as claimed in claim 1 is characterized in that, the valve block number of described first spool is five.

4. explosion relief valve as claimed in claim 3 is characterized in that, the boss of described five valve blocks and perforation number are respectively 8,6,4,2 and 0 from the supreme valve block of bottom valve sheet.

5. as each described explosion relief valve of claim 1 to 4, it is characterized in that the weak point number of the through hole of described valve gap and safety plate is respectively 2 and 4.