CN219994515U - Chromatographic valve gas circuit switching device with flame-proof function - Google Patents

Abstract

The utility model belongs to the technical field of chromatographic valve gas circuit switching, and particularly discloses a chromatographic valve gas circuit switching device with an explosion-proof function. The utility model can make the whole device have the explosion-proof function, thereby improving the safety.

Description

Chromatographic valve gas circuit switching device with flame-proof function

Technical Field

The utility model relates to the technical field of chromatographic valve gas circuit switching, in particular to a chromatographic valve gas circuit switching device with an explosion suppression function.

Background

The chromatographic valve is a gas path accessory of a weather chromatograph, is usually matched with a quantitative pipe and is used as a gas sample injection valve, the chromatographic valve comprises a valve body, a valve core and a valve clack, a plurality of gas path connectors are uniformly distributed on the circumference of the valve core of the chromatographic valve, the valve clack positioned in the valve body is provided with holes corresponding to the gas path connectors, and a channel in the valve clack is mutually communicated with the gas path connectors on the valve core by driving the valve clack to rotate; when the valve clack is driven to rotate, the channel on the valve clack converts the gas path joint into another gas path communication mode, so that the switching of the gas paths is realized.

The existing product is generally characterized in that a chromatographic valve is arranged on a shell, the valve at the front end of the shell is driven by an air source to switch an air path, the air consumption of the product is large, and the limitation of the application occasion is larger; the gas circuit that also has the motor that adopts in the current product to drive front end valve switches, but does not carry out design production according to the flameproof mode, there is great potential safety hazard to need guarantee the axiality between rotation part and the motor of valve in the current product, ensure valve pivoted precision, avoid the valve to produce deformation in long-term use, therefore in the current product to the requirement very high of installation precision among the installation cooperation mode between valve and the shell, in addition, connection structure between current product valve and the shell is installed through fixed form usually, inconvenient dismantlement change.

Disclosure of Invention

The utility model provides a chromatographic valve gas circuit switching device with an explosion-proof function, and aims to ensure that the whole device has an explosion-proof function, thereby improving the safety.

The utility model is realized by the following technical scheme: the utility model provides a chromatographic valve gas circuit auto-change over device with flame proof function, includes shell, motor and valve all are located in the shell, the inside motor cavity and the valve cavity of being equipped with of shell, the motor is located in the motor cavity, the valve is located in the valve cavity and can dismantle with the shell and be connected, the output shaft of motor passes the one end of motor cavity and with the valve clack connection of valve, the cable outlet has been seted up to the one end that the valve was kept away from to the motor cavity, just cable outlet department sealing connection has the sealing member, and the cable of motor passes cable outlet and sealing member in proper order.

Compared with the prior art, the utility model has the following advantages and beneficial effects: the valve is driven through the motor in this scheme and carries out the switching of gas circuit, and design according to the flameproof mode in this scheme, through setting up the sealing member, avoid the cable of motor to pass the shell and cause the not good problem of leakproofness to the security of whole device has been improved.

In addition, in this scheme, the valve can be dismantled with the shell and be connected, make things convenient for the later stage to dismantle and change or maintain.

Further, the seal is an explosion proof gram. The cable can pass through by adopting the explosion-proof gram, the colleague plays a role in sealing, the tightness of the explosion-proof gram is good, and the condition that the outside combustible gas enters into the shell to explode with the circuit inside the shell can be avoided.

Further, one end of the shell, provided with a cable outlet, is connected with a connecting cylinder, the connecting cylinder is communicated with the cable outlet, and the explosion-proof gram is in threaded connection with the connecting cylinder. Through setting up the connecting cylinder in this scheme, when installing explosion-proof gram, realize screw-fit connection through the external screw thread on the explosion-proof gram and the internal screw thread that sets up in the connecting cylinder, this connected mode easy operation, and this scheme convenient to detach and installation explosion-proof gram to be convenient for maintain explosion-proof gram.

Further, a sealing ring is arranged between the output shaft of the motor and the shell.

The beneficial effects are that: the sealing ring can improve the tightness in the motor cavity, so that gas can be prevented from entering the motor cavity, and the explosion-proof effect is achieved.

Further, one end of the motor is connected with one end of the motor chamber far away from the cable outlet through a fastener, and sealant is filled between the fastener and the end of the motor chamber. In this scheme the motor passes through the fastener to be fixed on the shell, improves the stability of motor, and the fastener needs to pass the shell and be connected with the motor, consequently can produce the hole and have the gap between fastener and the shell, and through filling the sealant in this scheme, can improve the leakproofness between fastener and the shell, further play explosion-proof effect.

Further, a torsion piece is coaxially connected to the output shaft of the motor, and the torsion piece is coaxially connected to the valve clack of the valve. In this scheme, can be with the power transmission of motor to the valve and drive the valve clack rotation of valve to play the effect of switching gas circuit.

Further, an upper gasket and a lower gasket are coaxially arranged between the torsion member and the end part of the motor chamber, the upper gasket is connected with the shell of the motor chamber, and the lower gasket is connected with the torsion member.

In the scheme, the upper gasket and the lower gasket can be arranged to disperse friction between the torsion piece and the shell, so that the service life of the torsion piece is prolonged.

Further, the valve body outside coaxial coupling of valve has fixed snap ring, the outside of fixed snap ring is connected with a plurality of circumference distribution's card protruding, offered a plurality of circumference distribution's draw-in groove on the shell, the draw-in groove with the valve cavity intercommunication, just the one end that the motor cavity was kept away from to the draw-in groove runs through in the shell, the draw-in groove includes mutually perpendicular's perpendicular groove and transverse groove, be equipped with the spacing snap ring that limits valve body roll-off valve body cavity on the shell, the outside of spacing snap ring is connected with a plurality of circumference distribution's spacing lug, a plurality of spacing lug can block respectively in the transverse groove, a plurality of card protruding can be located a plurality of respectively the perpendicular inslot of draw-in groove.

The fixed snap ring that valve body outside of valve was connected in this scheme has offered on perpendicular groove and the shell and has mutually supported, can improve the axiality between valve and shell, the motor, can improve the installation accuracy of valve like this, has also reduced the technical requirement to operating personnel equipment this device simultaneously, because improved the axiality of whole device, the component of valve inside also is difficult to produce deformation like this in long-time use to can improve the life of valve.

Further, one end of the valve body is connected with a fixing piece, the valve core penetrates through the fixing piece, and an elastic piece is arranged between the fixing piece and the limiting snap ring.

The setting of elastic component can make whole valve have the activity space of a round trip action in this scheme, has a cushioning effect to the valve like this, and after the protruding card of card on the fixed snap ring on the valve is erectting the groove, the spacing snap ring of rethread to card income in the draw-in groove to make spacing lug on the spacing snap ring be located after the transverse groove, can play the promotion effect to the valve under the effect of elastic component, and make valve automatic positioning installation accomplish, and spacing snap ring has also played spacing effect to whole valve, avoid the valve roll-off shell.

Further, one side of the horizontal groove, which is close to the vertical groove, is connected with a stop block, and the stop block can limit the limit lug to slide out of the horizontal groove.

The setting of dog can play spacing effect to spacing lug on the stopper in this scheme, avoids spacing lug roll-off cross slot by oneself.

Drawings

The accompanying drawings, which are included to provide a further understanding of embodiments of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model. In the drawings:

FIG. 1 is a block diagram of embodiment 1 of the present utility model;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is a partial enlarged view at B in FIG. 2;

FIG. 4 is a schematic view showing a part of the front view of the housing in embodiment 1 of the present utility model;

FIG. 5 is a top view of a retaining ring according to embodiment 1 of the present utility model;

FIG. 6 is a top view of a retainer ring according to embodiment 1 of the present utility model;

fig. 7 is a partial schematic view of the front view of the housing in embodiment 2 of the present utility model.

In the drawings, the reference numerals and corresponding part names:

the two-core cable 1, the explosion-proof gram 2, the cable outlet 3, the connecting cylinder 5, the welding port 6, the shell 7, the partition 701, the motor wiring port 8, the explosion-proof motor 9, the motor fixing screw 10, the sealing ring 11, the sealant 12, the upper gasket 13, the lower gasket 14, the torsion member 15, the valve body 16, the valve core 17, the fixing clamp ring 18, the clamping protrusion 181, the fastening screw 19, the fixing member 20, the elastic member 21, the limiting clamp ring 22, the limiting bump 221, the sample gas pipeline 23, the vertical groove 24, the transverse groove 25 and the stop block 26.

Detailed Description

For the purpose of making apparent the objects, technical solutions and advantages of the present utility model, the present utility model will be further described in detail with reference to the following examples and the accompanying drawings, wherein the exemplary embodiments of the present utility model and the descriptions thereof are for illustrating the present utility model only and are not to be construed as limiting the present utility model.

As shown in fig. 1-6, embodiment 1 provides a chromatographic valve gas path switching device with an explosion-proof function, which comprises a housing 7, a motor and a valve, wherein the motor and the valve are both positioned in the housing 7.

In this embodiment, the housing 7 is made of stainless steel, and a motor chamber and a valve chamber are provided inside the housing 7, and the valve chamber is located at the lower part of the housing 7 and the motor chamber is located at the upper part of the valve, for example, as illustrated in the orientation of fig. 1. As shown in fig. 2, a diaphragm 701 is fixedly connected to the inside of the housing 7, and the housing 7 is partitioned into a motor chamber and a valve chamber by the diaphragm 701.

The motor is located in the motor chamber, and in this embodiment, the output shaft of the motor passes through the baffle 701, the motor is connected with the baffle 701 of the housing 7 through the fastener, the fastener is the motor fixing screw 10, the motor fixing screw 10 penetrates from the bottom of the baffle 701 and is connected with the housing 7 of the motor, in order to improve the tightness of the motor chamber, the sealant 12 is filled between the motor fixing screw 10 and the end of the motor chamber (i.e. between the motor fixing screw and the baffle 701), thereby avoiding that the hole formed by the motor fixing screw 10 passing through the baffle 701 has a gap, and affecting the tightness of the motor chamber.

In this embodiment, the sealing ring 11 is arranged between the output shaft of the motor and the housing 7, so that the sealing performance of the motor cavity can be further improved.

The valve is located the valve cavity and can dismantle with shell 7 and be connected, the output shaft of motor passes the one end of motor cavity and is connected with the valve clack of valve, combine the fig. 1 to show, the cable outlet 3 has been seted up to the one end that the valve was kept away from to the motor cavity, and cable outlet 3 department sealing connection has the sealing member, the tip of motor is equipped with motor wiring mouth 8 in this embodiment, the cable of motor is worn out and is passed cable outlet 3 and sealing member in proper order from motor wiring mouth 8, and two cables of motor are in the same place the joint through two core cable 1 and export jointly.

In this embodiment, the sealing member is an anti-explosion gram 2, one end of the housing 7 provided with the cable outlet 3 is connected with the connecting cylinder 5, in this embodiment, the connecting cylinder 5 is welded and fixed with the top end of the housing 7, the connecting cylinder 5 is communicated with the cable outlet 3, and the anti-explosion gram 2 is in threaded connection with the connecting cylinder 5.

In this embodiment, the torsion member 15 is coaxially connected to the output shaft of the motor, the torsion member 15 is coaxially connected to the valve clack of the valve, the torsion member 15 and the output shaft of the motor, and the connection manner between the torsion member 15 and the valve clack can be performed by a person skilled in the art according to conventional means, for example, by plugging, clamping or connecting through other intermediate parts, the torsion member 15 can transmit the power of the output shaft of the motor to the valve clack to drive the valve clack to rotate.

In another embodiment, as shown in fig. 2, an upper gasket 13 and a lower gasket 14 are coaxially arranged between the torsion member 15 and the end of the motor chamber, the upper gasket 13 is connected with the housing 7 of the motor chamber, the lower gasket 14 is connected with the torsion member 15, and the upper gasket 13 and the lower gasket 14 can perform dispersed friction, so that friction between the torsion member 15 and the end of the motor chamber can be avoided, and the service life of the torsion member 15 is prolonged.

In the technical scheme of embodiment 1, the tightness of the motor cavity is very good, and the explosion-proof gram 2, the sealing ring 11 and the sealant 12 are arranged, so that external gas can be effectively prevented from entering the motor cavity, and a plurality of circuits are arranged in the motor cavity, so that the potential safety hazard of explosion is avoided.

As shown in conjunction with fig. 1 and 3, embodiment 2 differs from embodiment 1 in that: the valve body 16 outside coaxial coupling of valve has fixed snap ring 18, combines fig. 4 and 5 to show, and the outside of fixed snap ring 18 is connected with four circumference evenly distributed's card protruding 181, has seted up four circumference evenly distributed's draw-in grooves on the shell 7, draw-in groove and valve cavity intercommunication, and the one end that the motor cavity was kept away from to the draw-in groove runs through in the shell 7, and the draw-in groove includes mutually perpendicular's perpendicular vertical groove 24 and horizontal groove 25 in this embodiment promptly, and the bottom in vertical groove 24 runs through in the shell 7, and horizontal groove 25 is close to the bottom setting in the shell 7.

The shell 7 is provided with a limiting snap ring 22 for limiting the valve body 16 to slide out of the cavity of the valve body 16, and as shown in fig. 6, the outer side of the limiting snap ring 22 is connected with four limiting convex blocks 221 which are uniformly distributed in the circumferential direction, the four limiting convex blocks 221 can be respectively clamped in the transverse grooves 25, and the four clamping convex blocks 181 can be respectively inserted into the vertical grooves 24 of the four clamping grooves.

Referring to fig. 3, a fixing member 20 is connected to the bottom end of the valve body 16, a valve core 17 passes through the fixing member 20, a sample gas line 23 is connected to the valve core 17, and a through hole is formed in the center of the limit retainer ring 22, through which the sample gas line 23 passes. In this embodiment, the fixing member 20 is connected and fixed to the valve body 16 of the valve seat by a fastening screw 19, and the fixing member 20 is screwed to the valve body 16.

An elastic piece 21 is arranged between the fixing piece 20 and the limiting snap ring 22, and the elastic piece 21 in the embodiment adopts a disc spring set or a spring.

When the valve is installed in the valve cavity, the four clamping protrusions 181 of the fixed clamping ring 18 fixed on the outer side of the valve body 16 of the valve are inserted into the four vertical grooves 24 respectively, then the four limiting protrusions 221 of the limiting clamping ring 22 are inserted from the bottoms of the four vertical grooves 24 respectively, when the limiting clamping ring 22 is located in the transverse groove 25, the four limiting protrusions 221 of the limiting clamping ring 22 are rotated onto the four transverse grooves 25 through rotating the limiting clamping ring 22, so that the limiting clamping ring 22 is prevented from sliding out of the vertical grooves 24, the limiting clamping ring 22 can play a role in limiting and fixing the whole valve, and the whole valve is prevented from sliding out of the outer shell 7.

The limiting clamp protrusion 181 on the limiting clamp ring 22 can play a role in compressing and storing energy for the elastic piece 21 in the process of limiting the transverse groove 25, the elastic piece 21 can push the valve to be installed in place, and the elastic piece 21 can enable the whole valve to have a movable space capable of moving up and down, so that the whole valve is buffered.

In this embodiment, the four vertical grooves 24 can play a role in limiting and positioning the valve, so as to improve the coaxiality between the valve and the housing 7, the motor output shaft and the torsion member 15, thereby improving the installation accuracy and reducing the installation technical requirements on operators. And in the scheme, the clamping groove is matched with the limiting clamp ring 22 and the fixing clamp ring 18, so that the installation and the later quick replacement are more convenient.

As shown in fig. 7, the difference between embodiment 3 and embodiment 2 is that the side of the transverse groove 25, which is close to the vertical groove 24, is connected with a stop block 26, the stop block 26 and the side wall of the transverse groove 25 are integrally formed, and the stop block 26 can limit the limit bump 221 to slide out of the transverse groove 25, so that the limit snap ring 22 is more stable, and the limit effect on the valve is more stable.

The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the utility model, and is not meant to limit the scope of the utility model, but to limit the utility model to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the utility model are intended to be included within the scope of the utility model.

Claims (10)

1. The utility model provides a chromatographic valve gas circuit auto-change over device with flame proof function, includes shell, motor and valve all are located in the shell, its characterized in that, the inside motor cavity and the valve cavity that are equipped with of shell, the motor is located in the motor cavity, the valve is located in the valve cavity and can dismantle with the shell and be connected, the output shaft of motor passes motor cavity's one end and with the valve clack connection of valve, the cable outlet has been seted up to the one end that the valve was kept away from to the motor cavity, just cable exit sealing connection has the sealing member, and the cable of motor passes cable outlet and sealing member in proper order.

2. The chromatographic valve gas path switching device with the explosion-proof function according to claim 1, wherein the sealing element is an explosion-proof gram.

3. The chromatographic valve gas circuit switching device with the explosion-proof function according to claim 2, wherein one end of the shell, provided with a cable outlet, is connected with a connecting cylinder, the connecting cylinder is communicated with the cable outlet, and the explosion-proof gram is in threaded connection with the connecting cylinder.

4. A chromatographic valve gas path switching device with an explosion-proof function according to any one of claims 1-3, wherein a sealing ring is arranged between an output shaft of the motor and the housing.

5. The chromatographic valve gas circuit switching device with the explosion-proof function according to claim 4, wherein one end of the motor is connected with one end of the motor chamber far away from the cable outlet through a fastener, and sealant is filled between the fastener and the end of the motor chamber.

6. The chromatographic valve gas circuit switching device with the explosion-proof function according to claim 1, wherein a torsion member is coaxially connected to an output shaft of the motor, and the torsion member is coaxially connected to a valve clack of the valve.

7. The chromatographic valve gas circuit switching device with the explosion-proof function according to claim 6, wherein an upper gasket and a lower gasket are coaxially arranged between the torsion member and the end part of the motor chamber, the upper gasket is connected with the shell of the motor chamber, and the lower gasket is connected with the torsion member.

8. The chromatographic valve gas circuit switching device with the explosion-proof function according to claim 1, wherein a fixed snap ring is coaxially connected to the outer side of a valve body of the valve, a plurality of circumferentially distributed clamping protrusions are connected to the outer side of the fixed snap ring, a plurality of circumferentially distributed clamping grooves are formed in the shell, the clamping grooves are communicated with the valve cavity, one end, far away from the motor cavity, of the clamping grooves penetrates through the shell, the clamping grooves comprise vertical grooves and transverse grooves which are perpendicular to each other, a limiting snap ring for limiting the valve body to slide out of the valve body cavity is arranged on the shell, a plurality of circumferentially distributed limiting protruding blocks are connected to the outer side of the limiting snap ring, the limiting protruding blocks can be respectively clamped in the transverse grooves, and the clamping protrusions can be respectively located in the vertical grooves of the clamping grooves.

9. The chromatographic valve gas circuit switching device with the explosion-proof function according to claim 8, wherein one end of the valve body is connected with a fixing piece, a valve core of the valve penetrates through the fixing piece, and an elastic piece is arranged between the fixing piece and the limiting snap ring.

10. The chromatographic valve gas circuit switching device with the explosion-proof function according to claim 8 or 9, wherein one side of the transverse groove, which is close to the vertical groove, is connected with a stop block, and the stop block can limit the limit lug to slide out of the transverse groove.