CN202252125U

CN202252125U - Differential pressure two-valve group

Info

Publication number: CN202252125U
Application number: CN2011202993186U
Authority: CN
Inventors: 王大鹏
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-08-17
Filing date: 2011-08-17
Publication date: 2012-05-30
Anticipated expiration: 2021-08-17

Abstract

The utility model discloses a differential pressure two-valve group, which comprises a valve body and is characterized in that two spherical valve cores are respectively installed at the positions of the intersections of two longitudinal channels AB and CD and a horizontal channel HK, wherein the longitudinal channels AB and CD are parallel to each other and arranged in the valve body along the longitudinal axis direction, and the horizontal channel HK is arranged in the valve body along the horizontal axis direction. Two ends of the longitudinal channel AB are respectively connected with a transmitter high pressure interface and a pressure leading pipe high pressure interface, and two ends of the longitudinal channel CD are respectively connected with a transmitter low pressure interface and a low pressure side pressure leading pipe. The differential pressure two-valve group has the advantages that 1 a valve seat is made of polytetrafluoroethylene, and a soft seal is formed between spherical valve cores and the valve seat so that inner leakage is reduced to the large extent; 2 commissioning and shutdown operations of an instrument are simple, convenient and flexible; 3 pressure loss is small, service life is long, and a structure is simplified; and 4 long-distance commissioning, shutdown, pipeline overhaul, fault judgment and fault handling of the instrument can be achieved.

Description

A kind of differential pressure two valve groups

Technical field

The utility model relates to the chemical instruments technical field, especially relates to a kind of power type differential pressure two valve groups that are used to operate differential-pressure instrumentation.

Background technique

At present both at home and abroad to differential-pressure instrumentation such as liquid level meter, differential pressure transmitter, flow transmitter, the operation of differential pressure gauge etc.; Usually adopt three valve groups, three stop valves or four-way check valve, because three valve groups or three stop valves operations are complicated, step is many; Be prone to cause that operate miss causes damage,,, realize three valve group functions through rotating a handwheel so people hope to replace three valve groups through four-way check valve; Avoid operate miss, simplify procedures, but since four-way check valve in the fault of maintenance field instrument, use not as three valve groups flexible; Effect is undesirable, and application is restricted, therefore, though three valve group defectiveness; But can't be replaced, what people needed is to have the flexibility of three valve groups and the equipment of the convenient and safe property of four-way check valve concurrently, but does not also occur this technology now.On the other hand, though differential pressure transmitter has got into digital times, can realize long-range adjustment zero point and range, three valve groups; Four-way check valve is owing to structural reason, and closely manually-operable at the scene can not realize telecontrol, so; In the Maintenance and Repair of reality, the putting into operation of differential pressure transmitter with out of service, and for Fault Diagnosis and eliminating, majority can only carry out at the scene; And the radiation often of such scene, soda acid, high temperature, high-altitude; The hazardous environment of down-hole, very inconvenience, therefore three valve groups and the technological backwardness of the four-way check valve long-range adjustment that suppressed the digital type differential pressure transmitter and the provide convenient effect that can bring.

Summary of the invention

It is the deficiency to existing technology that the purpose of the utility model is to overcome, and a kind of advantage that has three valve groups and four-way check valve concurrently is provided, and easy-to-use more flexibly; More reliable and secure, simplify the structure simultaneously, reduced maintenance cost; Have high performance-price ratio, be superior to three original valve groups and two valve groups of four-way check valve; This two valves group both can be on-the-spot hand-manipulated, also remote controlled operation, and the technological scheme of employing is: a kind of differential pressure two valve groups; Comprise valve body; It is characterized in that: in the said valve body spherical valve core is arranged, said spherical valve core is two, is installed in the valve body in two vertical passage AB, CD and the valve bodies of opening, being parallel to each other along y direction the intersection of the crosspassage HK that opens along X direction respectively; The two ends of said vertical passage AB connect transformer high-voltage interface and pressure inlet tube high voltage interface respectively, and the two ends of said vertical passage CD connect transmitter low-voltage interface and low voltage side pressure inlet tube respectively.

The technological scheme of the utility model also has: also have by-pass EH and FK in the said valve body, said by-pass EH one end is communicated with crosspassage HK, and the other end is communicated with vertical passage AB; Said by-pass FK one end is communicated with crosspassage HK, and the other end is communicated with vertical passage CD; Said by-pass EH all becomes 45 with FK with crosspassage HK ^O

The technological scheme of the utility model also has: the side valve lid is equipped with in the end of said by-pass EH and FK.

The technological scheme of the utility model also has: be connected with movable valve rod on the said spherical valve core, the handle that the other end of said movable valve rod passes bonnet and micro motor is housed and under micro motor for driving, rotates.

The technological scheme of the utility model also has: be threaded between said bonnet and the said valve body, filler and gland are housed in the said bonnet, the gland that said filler and gland quilt are threaded with bonnet compresses.

The technological scheme of the utility model also has: said micro motor is bolted on the valve body surface through three; Said three bolts are arranged in isosceles right triangle, are on two bolts of said isosceles triangle hypotenuse the limit switch that can contact with said handle is housed respectively.

The technological scheme of the utility model also has: said micro motor also is provided with the remote control terminal switch button, and the rotor of micro motor is connected with said movable valve rod through cutting ferrule.

The technological scheme of the utility model also has: support the valve seat of spherical valve core in the said valve body in addition, said valve seat is processed by polytetrafluoroethylmaterial material.

The beneficial effect of the utility model is: 1) because valve seat adopts teflon, form soft seal between ball core and the valve seat, sealing can reach airtight level; Sealing effect is much better than over the hard sealing that three valve groups or four-way check valve adopt; Two ball cores be designed to H between two ball cores, I, the cut-out of K passage provides duplicate protection; Reduced interior leakage to greatest extent, made the reliability of equipment work significantly rising arranged than three valve groups or four-way check valve.

2) the utility model make instrument put into operation and the operation of stopping transport more easy flexibly; Reduced working strength; Improved working efficiency, when instrument is overhauled, only needed to get final product complete operation to handle 1 half-twist of high and low pressure side ball valve; The daily habits that meets people, and three valve groups or four-way check valve implement relative complex.

3) pressure loss is littler, longer service life, and structure is more simplified, and safeguards more conveniently, and cost performance is higher.

4) can realize that the long-range of instrument put into operation, stop transport, the inspection pipeline, fault judgement cooperates with digital differential pressure transmitter, more can realize long-range completely verification maintenance and fault treatment.

Description of drawings

Fig. 1 is the cavity top plan view of two valve groups, and Fig. 2 is the side cutaway view of two valve groups, and Fig. 3 is the front sectional elevation of two valve groups, and Fig. 4 is the circuit theory sketch of two valve groups, wherein; The 1st, handle, the 2nd, gland, the 3rd, gland, the 4th, filler, the 5th, bonnet; The 6th, valve seat, the 7th, ball core, the 8th, movable valve rod, the 9th, valve body, the 10th, bolt; The 11st, micro motor, the 12nd, limit switch, the 13rd, side valve lid, the 14th, limit switch; Z is the telecontrol end switch, and T is that the telecontrol end button is just changeing the contact, and Q is remote control terminal ball button counter-rotating contact, and U is a system power supply.

Embodiment

Below in conjunction with accompanying drawing, the embodiment of the utility model is described.Valve body 9 is a stainless steel cuboid, before and after the longitudinal axis has two, connects vertical passage AB and the CD that is parallel to each other, and has a crosspassage HIK who intersects vertically with AB and CD along transverse axis, three-aisled two intersections; By digging two circular grooves under the plane on the valve body 9, respectively put into ball core 7 and two groups of orthogonal valve seats of laying 6 that stainless steel is processed, ball core 7 is divided into A to three passages, B with valve seat 6; C, D, H, I; 7 sections passages of K, ball core 7 is connected with movable valve rod 8, filler 4; Gland 2, gland 3 overlap the ovable valve stem 8 of making a living successively and are pressed into, and overlap the ovable valve stem 8 of making a living to bonnet 5; Screw in valve body 9 through screw thread, screw through screw thread again, load onto handle 1 for again movable valve rod 8; Load onto micro motor 11 on the top of movable valve rod 8, micro motor 11 is fixed on through three bolts 10 on the last plane of valve body 9, and three bolts 10 are arranged in isosceles right triangle; Be on two bolts 10 of hypotenuse and respectively have the spacing of a band sensitive switch, Joystick 1 rotates in 90 ° of amplitudes, accomplishes the make-break operation of each passage.Micro-motor rotor is connected with movable valve rod 8 through cutting ferrule, through the 8 forward and reverse rotations of a telecontrol end switch Z drive activity valve rod.On A channel, have by-pass E, by-pass E becomes 45 to be communicated with A channel and H passage, on A channel, has by-pass E, and by-pass E becomes 45 to be communicated with A channel and H passage.On C-channel, have by-pass F, by-pass F becomes 45 to be communicated with C-channel and K passage.The B passage connects the high pressure side pressure inlet tube, and A channel connects the transmitter high voltage interface, and the D passage connects the low voltage side pressure inlet tube, and C-channel connects the transmitter low-voltage interface, 13 sealings of side valve lid E, and H passage and F, the effect of K passage is screwed through screw thread.

When the differential pressure transmitter bringing normally into operation, two ball valves of two valve groups become on state, passage A, and B is communicated with; Channel C, D is communicated with, and H passage and I passage break off; K passage and I passage break off, because two ball valves form double-sealing, thereby have guaranteed do not have interior leakage between two passage AB of high low pressure and CD.

When differential pressure transmitter was in shut down condition, two ball valves of two valve groups became cut-off state, passage A, and B breaks off, channel C; D breaks off, H passage and I channel connection, and K passage and I channel connection, since passage A, E; H is communicated with all the time, thus passage A and passage I connection, since channel C, F, and K is communicated with all the time; So channel C and passage I are communicated with, thereby have guaranteed two passage A of high low pressure, C passes through balance channel H, I, and K is communicated with.

When differential pressure transmitter transfers the stoppage in transit process to by bringing normally into operation, rotate 1 90 ° on two valve group high pressure side handles, passage A, B ends by being communicated with to become, and H passage and I passage are by being communicated with by becoming; Rotate 1 90 ° on two valve group low voltage side handles, channel C, D ends by being communicated with to become, and K passage and I passage are by being communicated with K passage and I passage and H channel connection by becoming; Since passage A, E, and H is communicated with all the time, so passage A and passage I are communicated with; Since channel C, F, and K is communicated with all the time, so channel C and passage I are communicated with; Thereby guaranteed two passage A of high low pressure, C passes through balance channel H, I, and K is communicated with.

When differential pressure transmitter transfers the bringing normally into operation process to by stoppage in transit, rotate 1 90 ° on two valve group low voltage side handles, channel C; D is by being communicated with by becoming, and K passage and I passage end by being communicated with to become, and rotate 1 90 ° on two valve group high pressure side handles; Passage A, B is by being communicated with by becoming, and H passage and I passage end by being communicated with to become; So become cut-off state between K passage and I passage and the H passage,, thereby guaranteed do not have interior leakage between two passage AB of high low pressure and CD because two ball valves form double-sealings.

Because by design; The aperture of ball core mesopore wants to reach to make in mutually perpendicular four valve seats with respect to the ratio of ball core; Every two adjacent in twos valve base chambers have enough distances, and when guaranteeing that spherical valve core rotates 45 °, ball core and two groups of valve seats all form by not on-state.Even, insulating liquid can not occur from the high side to low side phenomenon of backwashing so, rotate 90 ° on high and low pressure side handle simultaneously not according to rules operations yet.

When carrying out the instrument maintenance at the scene, can open and close the malleation side valve or the negative pressure side valve of two valve groups respectively, through various switching combinations, to help judging that logical stifled situation of positive and negative pressure inlet tube and differential pressure transmitter produce the reason of fault.When being in radiation, soda acid, high temperature, the high-altitude, the hazardous environment of down-hole, when the site examining and repairing difficulty is big, can remote operation control in the control room.Telecontrol integral switch Z can be the switch button on the secondary table, also can make the software kit form, and on-the-spot if desired hand is grasped two valve groups, need to place contact Q to button Z, and the off-position that contact T does not press, otherwise the scene can't be grasped and done.So just strengthened control, avoided the illegal operation phenomenon the unattended duty field instrument.The wiring of two motors all is the motor connection principle by Fig. 4.Because the spin friction moment of two valve group ball valves is very little, the low voltage micromachine of employing can be done very for a short time, and the moment that needs only generation is greater than two valve group friction torque, and easily drive activity valve rod gets final product.When control switch Z dials when just changeing, contact T presses, circuit turn-on, and motor just changes, and drive activity valve rod just changes, and when movable valve rod rotates, is being with handle to run at spacing 12 o'clock, and limit switch becomes disconnection by normally off, the stall of motor dead electricity; When control switch was dialled to counter-rotating, contact Q pressed, circuit turn-on, and the motor counter-rotating, the counter-rotating of drive activity valve rod when movable valve rod rotates, is being with handle to run at spacing 14 o'clock, and limit switch becomes disconnection by normally off, the stall of motor dead electricity.The effect that two valve group conductings end can reflect on connected differential pressure transmitter data variation; Data judgement differential pressure transmitter is started shipment the state of stoppage in transit in view of the above; The logical stifled situation of positive and negative impulse pipeline, zero shift scopes etc. are in time found out failure cause; Make correct handling, reduce idle work.

Because it is theoretical that two valve groups rise to two valves to three valve theories of three valve groups and four-way check valve, simplify the structure, and the pressure loss is littler, more be difficult for stopping up, even stop up, also mediation more easily.In addition, movable member still less, it is littler to wear and tear, and has prolonged working life greatly, two valve group use and maintenance cost are all lower.

The enforcement of two valve groups has overcome the shortcoming of three valve groups and four-way check valve preferably, has remedied the deficiency of existing technology, has reached purpose of design.

Certainly; Above-mentioned explanation is not the restriction to the utility model; The utility model also be not limited only to above-mentioned for example, variation, remodeling, interpolation or replacement that those skilled in the art are made in the essential scope of the utility model also belong to the protection domain of the utility model.

Claims

1. differential pressure two valve groups; Comprise valve body; It is characterized in that: in the said valve body spherical valve core is arranged, said spherical valve core is two, is installed in the valve body in two vertical passage AB, CD and the valve bodies of opening, being parallel to each other along y direction the intersection of the crosspassage HK that opens along X direction respectively; The two ends of said vertical passage AB connect transformer high-voltage interface and pressure inlet tube high voltage interface respectively, and the two ends of said vertical passage CD connect transmitter low-voltage interface and low voltage side pressure inlet tube respectively.

2. according to the described differential pressure two valve groups of claim 1, it is characterized in that: also have by-pass EH and FK in the said valve body, said by-pass EH one end is communicated with crosspassage HK, and the other end is communicated with vertical passage AB; Said by-pass FK one end is communicated with crosspassage HK, and the other end is communicated with vertical passage CD; Said by-pass EH all becomes 45 with FK with crosspassage HK ^O

3. according to the described differential pressure two valve groups of claim 2, it is characterized in that: the side valve lid is equipped with in the end of said by-pass EH and FK.

4. according to the described differential pressure two valve groups of claim 1, it is characterized in that: be connected with movable valve rod on the said spherical valve core, the handle that the other end of said movable valve rod passes bonnet and micro motor is housed and under micro motor for driving, rotates.

5. according to the described differential pressure two valve groups of claim 4, it is characterized in that: be threaded between said bonnet and the said valve body, filler and gland are housed in the said bonnet, the gland that said filler and gland quilt are threaded with bonnet compresses.

6. according to the described differential pressure two valve groups of claim 4; It is characterized in that: said micro motor is bolted on the valve body surface through three; Said three bolts are arranged in isosceles right triangle, are on two bolts of said isosceles triangle hypotenuse the limit switch that can contact with said handle is housed respectively.

7. according to the described differential pressure two valve groups of claim 4, it is characterized in that: said micro motor also is provided with the telecontrol end switch, and the rotor of micro motor is connected with said movable valve rod through cutting ferrule.

8. according to the described differential pressure two valve groups of claim 1, it is characterized in that: support the valve seat of spherical valve core in the said valve body in addition, said valve seat is processed by polytetrafluoroethylmaterial material.