CN113294560A

CN113294560A - High-pressure bidirectional switching electric stop valve

Info

Publication number: CN113294560A
Application number: CN202110465479.6A
Authority: CN
Inventors: 王营军; 刘照智; 樊蕾; 文小平; 陈山; 刘茜; 程帆; 陈思麒
Original assignee: Beijing Institute of Space Launch Technology
Current assignee: Beijing Institute of Space Launch Technology
Priority date: 2021-04-28
Filing date: 2021-04-28
Publication date: 2021-08-24
Anticipated expiration: 2041-04-28
Also published as: CN113294560B

Abstract

The invention discloses a high-pressure bidirectional switching electric stop valve which comprises a valve body, wherein a normally open valve, a normally closed valve and a pilot valve are arranged on the valve body, and an air inlet, a normally open side air supply opening and a normally closed side air supply opening are formed in the valve body. The high-pressure bidirectional switching electric stop valve is applied to a carrying type ground gas supply system and a low-temperature filling system, is used for controlling a connector and a filling valve, achieves the purpose of gas path bidirectional switching, and has extremely high flexibility and reliability.

Description

High-pressure bidirectional switching electric stop valve

Technical Field

The invention relates to a valve, in particular to an electric stop valve which is suitable for the field of filling and gas supply systems.

Background

In the existing carrying type ground gas supply system and the low-temperature filling system, the working performance index of the electromagnetic valve and the rapidity and reliability of bidirectional switching response have critical influence on the overall performance and the task reliability of the system. When the existing electromagnetic valve is used, the problems of poor flexibility and poor reliability exist.

Disclosure of Invention

The invention aims to solve the technical problem of providing a high-pressure bidirectional switching electric stop valve which is applied to a carrying type ground gas supply system and a low-temperature filling system, has the function of controlling a connector and a filling valve to realize the purpose of bidirectional switching of gas paths, and has extremely high flexibility and reliability.

The invention relates to a high-pressure two-way switching electric stop valve, which comprises a valve body, wherein a normally open valve, a normally closed valve and a pilot valve are arranged on the valve body, an air inlet, a normally open side air supply port and a normally closed side air supply port are arranged on the valve body,

the normally open valve comprises a normally open valve, a normally open valve cavity, a normally open piston and a normally open piston cavity, wherein the normally open valve cavity and the normally open piston cavity are arranged in the valve body, the normally open valve and the normally open piston are respectively arranged in the normally open valve cavity and the normally open piston cavity, a normally open valve seat is arranged between the normally open valve cavity and the normally open piston cavity, a normally open valve rod through hole for communicating the normally open valve cavity and the normally open piston cavity is arranged on the normally open valve seat, a normally open valve rod is arranged between the normally open valve and the normally open piston and penetrates through the normally open valve rod through hole, the normally open piston divides the normally open piston cavity into a normally open pressure release cavity and a normally open back pressure cavity, the normally open pressure release cavity is positioned between the normally open piston and the normally open valve seat, a normally open pressure release hole communicated with the outside of the valve body is arranged on the normally open pressure release cavity, and a normally open air inlet channel communicated with an air inlet is arranged at one end of the normally open valve seat of the normally open valve cavity, the normally open valve cavity is provided with the normally open side air supply port communicated with the outside of the valve body,

the normally closed valve comprises a normally closed valve, a normally closed valve cavity, a normally closed piston and a normally closed piston cavity, wherein the normally closed valve cavity and the normally closed piston cavity are arranged in the valve body, the normally closed valve and the normally closed piston are respectively arranged in the normally closed valve cavity and the normally closed piston cavity, a normally closed valve seat is arranged between the normally closed valve cavity and the normally closed piston cavity, a normally closed valve rod through hole for communicating the normally closed valve cavity with the normally closed piston cavity is formed in the normally closed valve seat, a normally closed valve rod is arranged between the normally closed valve and the normally closed piston and penetrates through the normally closed valve rod through hole, the normally closed piston separates the normally closed piston cavity into a normally closed pressure release cavity and a normally closed backpressure cavity, the normally closed pressure release cavity is located between the normally closed piston and the normally closed valve seat, a normally closed pressure release hole communicated with the outside of the valve body is formed in the normally closed pressure release cavity, and a normally closed air inlet channel communicated with an air inlet is formed in one end of the normally closed valve seat of the normally closed valve cavity, the normally closed valve cavity is provided with the normally closed side air supply port communicated with the outside of the valve body,

the pilot valve comprises a pilot valve, a pilot valve cavity and an electromagnetic control device, the pilot valve cavity is arranged on the valve body, the pilot valve is arranged in the pilot valve cavity, the electromagnetic control device is arranged outside the valve body, a mandril channel communicated with the outside of the valve body is arranged on the pilot valve cavity, a mandril is arranged between the electromagnetic control device and the pilot valve, the mandril is positioned in the mandril channel, a pilot air inlet channel communicated with an air inlet is arranged at one end of the pilot valve cavity opposite to the mandril channel, the electromagnetic control device drives the pilot valve to move in the pilot valve cavity through the mandril to alternatively open or close the mandril channel and the pilot air inlet channel,

a first gas channel is arranged between a normally open back pressure cavity of the normally open piston cavity and the normally closed valve cavity, a second gas channel is arranged between the normally closed back pressure cavity of the normally closed piston cavity and the pilot valve cavity, and a pilot pressure relief hole communicated with the outside of the valve body is formed in the ejector rod channel.

The high-pressure bidirectional switching electric stop valve is characterized in that a normally open installation cavity for installing a normally open valve is arranged on the valve body, a normally open valve seat, a normally open piston and a normally open plug cover are sequentially installed in the normally open installation cavity from inside to outside, the normally open valve seat is cylindrical, the normally open piston is arranged in a cylinder cavity of the normally open valve seat, the cylinder cavity of the normally open valve seat forms a normally open piston cavity, the normally open plug cover is fixedly arranged in the normally open installation cavity, one end of the normally open valve seat abuts against the normally open plug cover, the other end of the normally open valve seat abuts against a first annular boss on the inner wall of the normally open installation cavity, and O-shaped sealing rings are arranged between the normally open valve seat and the normally open installation cavity and between the normally open plug cover and the normally open installation cavity.

The invention relates to a high-pressure bidirectional switching electric stop valve, wherein a normally open valve rod is arranged between a normally open valve and a normally open piston in the specific mode that: normally open the valve rod and include first valve rod and the second valve rod of mutual disposition, first valve rod is fixed locate on the normally open valve and with normally open valve integrated into one piece, the second valve rod is fixed locate on the normally open piston and with normally open piston integrated into one piece, the normally open piston set up second valve rod one end and be conical, the section of thick bamboo chamber that is close to normally open valve one end of normally open the valve seat also is conical, the conical end of normally open piston and the conical section of thick bamboo chamber phase-match of normally open the valve seat.

The high-pressure bidirectional switching electric stop valve is characterized in that a normally closed installation cavity for installing a normally closed valve is arranged on the valve body, a normally closed valve seat, a normally closed piston and a normally closed plug cover are sequentially installed in the normally closed installation cavity from inside to outside, the normally closed valve seat is cylindrical, the normally closed piston is arranged in a cylinder cavity of the normally closed valve seat, the cylinder cavity of the normally closed valve seat forms the normally closed piston cavity, the normally closed plug cover is fixedly arranged in the normally closed installation cavity, one end of the normally closed valve seat abuts against the normally closed plug cover, the other end of the normally closed valve seat abuts against a second annular boss on the inner wall of the normally closed installation cavity, and O-shaped sealing rings are arranged between the normally closed valve seat and the normally closed installation cavity and between the normally closed plug cover and the normally closed installation cavity.

The invention relates to a high-pressure bidirectional switching electric stop valve, wherein a normally closed valve rod is arranged between a normally closed valve and a normally closed piston in the specific mode that: the normally closed valve rod includes mutual disposition's third valve rod and fourth valve rod, the third valve rod is fixed locate on the normally closed valve and with normally closed valve integrated into one piece, the fourth valve rod is fixed locate on the normally closed piston and with normally closed piston integrated into one piece, the normally closed piston set up fourth valve rod one end and be conical, the section of thick bamboo chamber that is close to normally closed valve one end of normally closed valve seat also is conical, the conical end of normally closed piston and the conical section of thick bamboo chamber phase-match of normally closed valve seat.

The high-pressure bidirectional switching electric stop valve is characterized in that the normally open pressure relief hole and the normally closed pressure relief hole are respectively provided with an air relief nozzle, the air relief nozzles are barrel-shaped, a barrel opening of each air relief nozzle is connected to the normally open pressure relief hole/the normally closed pressure relief hole in a threaded mode, an air relief through hole is formed in the barrel wall of each air relief nozzle, and a leakage detection through hole is formed in the barrel bottom of each air relief nozzle.

The high-pressure bidirectional switching electric stop valve is characterized in that a connecting cylinder is fixedly arranged on a valve body, a valve seat is hermetically sleeved in the connecting cylinder, a pilot valve cavity is arranged at one end, close to the valve body, of the valve seat, a push rod channel is arranged at one end, far away from the valve body, of the valve seat, a spring is arranged between one end, close to a pilot air inlet channel, of the pilot valve and the valve body, a third annular boss is arranged between the push rod channel and the pilot valve cavity, a columnar top head is arranged at one end, close to the third annular boss, of the push rod, one end, close to the third annular boss, of the pilot valve is conical, and the columnar top head penetrates through the third annular boss and abuts against the conical end of the pilot valve.

The invention relates to a high-voltage bidirectional switching electric stop valve, wherein an electromagnetic control device comprises a wire disc-shaped shielding sleeve, a coil is wound on the periphery of the wire disc-shaped shielding sleeve, a static iron core is fixedly arranged at the lower end of an inner cavity of the wire disc-shaped shielding sleeve, a movable iron core is sleeved at the upper end of the inner cavity of the wire disc-shaped shielding sleeve, a connecting sleeve is clamped at the lower end of the static iron core and is in threaded connection with a connecting cylinder, the lower end of the static iron core abuts against a valve seat, an O-shaped sealing ring is arranged between the valve seat and the connecting cylinder, one end, far away from a third annular boss, of an ejector rod penetrates through the static iron core and is then fixedly connected to the movable iron core, a shell is arranged on the outer side of the wire disc-shaped shielding sleeve, a cable joint is arranged on the shell, and the cable joint is electrically connected with the coil.

The high-pressure bidirectional switching electric stop valve is characterized in that an air inlet nozzle is arranged on the air inlet, the air inlet nozzle is cylindrical, one end of the air inlet nozzle is connected to the air inlet in a threaded sealing mode, and the other end of the air inlet nozzle is connected with an air inlet cap in a threaded mode.

The high-pressure bidirectional switching electric stop valve is characterized in that air supply nozzles are arranged on the normally open side air supply port and the normally closed side air supply port respectively, the air supply nozzles are cylindrical, one end of each air supply nozzle is connected to the normally open side air supply port/the normally closed side air supply port in a threaded sealing mode, the other end of each air supply nozzle is connected with an air supply cap in a threaded mode, and the valve body is a regular polygon body.

The high-pressure bidirectional switching electric stop valve is different from the prior art in that the high-pressure bidirectional switching electric stop valve is a combined form of a main valve and a pilot valve, a single-point control pilot type control structure is adopted, a normally closed side piston (namely the normally closed piston) of the main valve is controlled through the action of the pilot valve, and the normally closed piston pushes the normally closed valve to control the opening and closing of a normally closed side air passage; along with the opening and closing of the pilot valve, the gas also makes the normally open side piston (namely the normally open piston) reciprocating motion at the same time, and the normally open piston pushes the normally open valve to control the normally open side gas circuit to open and close, so that the bidirectional rapid and stable switching of the valve is finally realized. The high-pressure bidirectional switching electric stop valve comprehensively considers the reliability and manufacturability of products and parts, so that the high-pressure bidirectional switching electric stop valve has extremely high flexibility and reliability.

The normally-open valve rod between the normally-open valve and the normally-open piston is not an integral structure, but is designed into the first valve rod integrally formed with the normally-open valve and the second valve rod integrally formed with the normally-open piston, namely, the normally-open valve and the normally-open piston are designed into a split structure, the length of the normally-open valve rod is respectively processed on the normally-open valve and the normally-open piston, so that the strength of the normally-open valve and the normally-open piston is enhanced by the split structure, the processing period is obviously shortened, the structural stability of the normally-open valve and the normally-open piston can be improved, and the stability of mutual action between the normally-open valve and the normally-open piston can be improved. Similarly, the normally closed valve rod between the normally closed valve and the normally closed piston in the invention also adopts the same structure as the normally open valve rod, and the structural stability of the normally closed valve and the normally closed piston and the stability of mutual action between the normally closed valve and the normally closed piston can be improved.

In the invention, the normally open pressure relief hole and the normally closed pressure relief hole are respectively provided with the air relief nozzle, and the barrel bottom of the air relief nozzle is provided with the leakage detection through hole, so that one end of the rubber tube can be connected with the outer barrel wall of the air relief nozzle when the air relief nozzle performs leakage detection (at the moment, the air relief through hole in the barrel wall is blocked by the rubber tube, gas in the valve body can enter the rubber tube through the leakage detection through hole), the other end of the rubber tube is immersed in leakage detection liquid, the high-pressure bidirectional switching electric stop valve is subjected to leakage detection by a bubble method, and the air tightness detection efficiency of the electric stop valve is improved.

The valve body is a regular polygon, so that the appearance of the valve body and internal components of the valve body are convenient to process, and the pneumatic characteristic of the valve body can be improved.

The invention will be further explained with reference to the drawings.

Drawings

FIG. 1 is a working schematic diagram of the high-pressure two-way switching electric cut-off valve of the present invention (the electromagnetic control device is in a power-off state);

FIG. 2 is a working schematic diagram of the high-voltage bidirectional-switching electric cut-off valve (the electromagnetic control device is in a power-on state) of the invention;

FIG. 3 is a schematic structural diagram of the high-pressure bidirectional-switching electric stop valve of the present invention;

FIG. 4 is an enlarged view of a portion of FIG. 3 at B;

FIG. 5 is a cross-sectional view taken along line A-A of FIG. 3;

fig. 6 is a pressure buildup process curve diagram of the normally open side and the normally closed side of the high-pressure bidirectional switching electric stop valve.

Detailed Description

As shown in fig. 1 and fig. 2-6, the high-pressure two-way switching electric stop valve of the present invention includes a valve body 45, wherein a normally open valve, a normally closed valve and a pilot valve are disposed on the valve body 45, and an air inlet 18, a normally open side air supply port 23 and a normally closed side air supply port 13 are disposed on the valve body 45. The normally open valve is provided on the normally open side of the valve body 45, and the normally closed valve is provided on the normally closed side of the valve body 45. Gas enters the valve body 45 through the gas inlet 18, and then exits the valve body 45 through the normally open side gas supply port 23/the normally closed side gas supply port 13 to be supplied. The bidirectional switching means switching the supply air between the normally open side air supply port 23 and the normally closed side air supply port 13.

The normally open valve comprises a normally open valve 22, a normally open valve cavity 21, a normally open piston 29 and a normally open piston cavity 30, wherein the normally open valve cavity 21 and the normally open piston cavity 30 are arranged in a valve body 45, the normally open valve 22 and the normally open piston 29 are respectively arranged in the normally open valve cavity 21 and the normally open piston cavity 30, a normally open valve seat 25 is arranged between the normally open valve cavity 21 and the normally open piston cavity 30, a normally open valve rod through hole 24 for communicating the normally open valve cavity 21 and the normally open piston cavity 30 is arranged on the normally open valve seat 25, a normally open valve rod 26 is arranged between the normally open valve 22 and the normally open piston 29, the normally open valve rod 26 penetrates through the normally open valve rod through hole 24, the normally open piston 29 divides the normally open piston cavity 30 into a normally open pressure relief cavity 28 and a normally open back pressure cavity 31, the normally open pressure relief cavity 28 is positioned between the normally open piston 29 and the normally open valve seat 25, and a normally open pressure relief hole 27 communicated with the outside the valve body 45 is arranged on the normally open pressure relief cavity 28, and a normally open air inlet channel 20 communicated with the air inlet 18 is arranged at one end of the normally open valve cavity 21, which is opposite to the normally open valve seat 25, and the normally open side air supply port 23 communicated with the outside of the valve body 45 is arranged on the normally open valve cavity 21.

The normally closed valve comprises a normally closed valve 14, a normally closed valve cavity 15, a normally closed piston 8 and a normally closed piston cavity 7, wherein the normally closed valve cavity 15 and the normally closed piston cavity 7 are arranged in a valve body 45, the normally closed valve 14 and the normally closed piston 8 are respectively arranged in the normally closed valve cavity 15 and the normally closed piston cavity 7, a normally closed valve seat 17 is arranged between the normally closed valve cavity 15 and the normally closed piston cavity 7, a normally closed valve rod through hole 12 for communicating the normally closed valve cavity 15 with the normally closed piston cavity 7 is arranged on the normally closed valve seat 17, a normally closed valve rod 11 is arranged between the normally closed valve 14 and the normally closed piston 8, the normally closed valve rod 11 penetrates through the normally closed valve rod through hole 12, the normally closed piston 8 separates the normally closed piston cavity 7 into a normally closed pressure relief cavity 10 and a normally closed back pressure cavity 6, the normally closed pressure relief cavity 10 is positioned between the normally closed piston 8 and the normally closed piston seat 17, and a normally closed pressure relief hole 9 communicated with the outside the valve body 45 is arranged on the pressure relief cavity 10, one end of the normally closed valve cavity 15, which is opposite to the normally closed valve seat 17, is provided with a normally closed air inlet channel 16 communicated with an air inlet 18, and the normally closed valve cavity 15 is provided with a normally closed side air supply port 13 communicated with the outside of the valve body 45.

The pilot valve comprises a pilot valve 4, a pilot valve cavity 33 and an electromagnetic control device 1, the pilot valve cavity 33 is arranged on a valve body 45, the pilot valve 4 is arranged in the pilot valve cavity 33, the electromagnetic control device 1 is arranged outside the valve body 45, a mandril channel 2 communicated with the outside of the valve body 45 is arranged on the pilot valve cavity 33, a mandril 34 is arranged between the electromagnetic control device 1 and the pilot valve 4, the mandril 34 is positioned in the mandril channel 2, one end, opposite to the mandril channel 2, of the pilot valve cavity 33 is provided with a pilot air inlet channel 19 communicated with an air inlet 18, and the electromagnetic control device 1 drives the pilot valve 4 to move in the pilot valve cavity 33 through the mandril 34 so as to alternately open or close the mandril channel 2 and the pilot air inlet channel 19.

A first gas channel 32 is arranged between a normally open back pressure cavity 31 of the normally open piston cavity 30 and the normally closed valve cavity 15, a second gas channel 5 is arranged between a normally closed back pressure cavity 6 of the normally closed piston cavity 7 and a pilot valve cavity 33, and a pilot pressure relief hole 3 communicated with the valve body 45 is arranged on the ejector rod channel 2.

As shown in fig. 5, in the high-pressure bidirectional-switching electric stop valve of the present invention, a normally open installation cavity for installing a normally open valve is arranged on the valve body 45, a normally open valve 22, a normally open valve seat 25, a normally open piston 29 and a normally open plug 57 are sequentially installed in the normally open installation cavity from inside to outside, the normally open valve seat 25 is in a cylindrical shape, the normally open piston 29 is arranged in a cylindrical cavity of the normally open valve seat 25, the cylindrical cavity of the normally open valve seat 25 forms the normally open piston cavity 30, the normally open plug 57 is fixedly arranged in the normally open installation cavity in a threaded connection manner, one end of the normally open valve seat 25 abuts against the normally open plug 57, and the other end of the normally open valve seat 25 abuts against a first annular boss 58 on the inner wall of the normally open installation cavity. Normally open valve seat 25 and normally open between the installation cavity and normally open blanking cover 57 and normally open between the installation cavity all be equipped with O type sealing washer to reach normally open valve seat 25 and normally open between the installation cavity and normally open blanking cover 57 and normally open between the installation cavity sealed effect.

Normally open blanking cover 57 will normally open the valve seat 25 and compress tightly to fix in normally opening the installation cavity, normally open blanking cover 57 is compressing tightly normally open valve seat 25 the time, normally open blanking cover 57 supports in the nozzle edge of normally opening valve seat 25.

The invention relates to a high-pressure bidirectional switching electric stop valve, wherein a normally open valve rod 26 is arranged between a normally open valve 22 and a normally open piston 29 in the following specific mode: normally open valve stem 26 includes first valve stem 52 and the second valve stem 53 of mutual disposition, first valve stem 52 is fixed locate on normally opening valve 22 and with normally open valve 22 integrated into one piece, second valve stem 53 is fixed locate on normally opening piston 29 and with normally open piston 29 integrated into one piece, normally open piston 29 set up second valve stem 53 one end and be conical, the section of thick bamboo chamber that is close to normally open valve 22 one end of normally opening valve seat 25 also is conical, the conical end of normally opening piston 29 matches with the conical section of thick bamboo chamber of normally opening valve seat 25.

As shown in fig. 5, in the high-pressure bidirectional switching electric stop valve of the present invention, a normally closed installation cavity for installing a normally closed valve is arranged on the valve body 45, a normally closed valve 14, a normally closed valve seat 17, a normally closed piston 8 and a normally closed plug cover 60 are sequentially installed in the normally closed installation cavity from inside to outside, the normally closed valve seat 17 is in a cylindrical shape, the normally closed piston 8 is arranged in the cylindrical cavity of the normally closed valve seat 17, the cylindrical cavity of the normally closed valve seat 17 forms the normally closed piston cavity 7, the normally closed plug cover 60 is fixedly arranged in the normally closed installation cavity in a threaded connection manner, one end of the normally closed valve seat 17 abuts against the normally closed plug cover 60, and the other end of the normally closed valve seat 17 abuts against a second annular boss 59 on the inner wall of the normally closed installation cavity. O-shaped sealing rings are arranged between the normally closed valve seat 17 and the normally closed mounting cavity and between the normally closed blocking cover 60 and the normally closed mounting cavity, so that the effects of sealing between the normally closed valve seat 17 and the normally closed mounting cavity and sealing between the normally closed blocking cover 60 and the normally closed mounting cavity are achieved.

The normally closed plug cover 60 compresses and fixes the normally closed valve seat 17 in the normally closed installation cavity, and when the normally closed plug cover 60 compresses the normally closed valve seat 17, the normally closed plug cover 60 is abutted against the edge of the cylinder opening of the normally closed valve seat 17.

The invention relates to a high-pressure bidirectional switching electric stop valve, wherein a normally closed valve rod 11 is arranged between a normally closed valve 14 and a normally closed piston 8 in the following specific mode: normally closed valve rod 11 includes third valve rod 62 and fourth valve rod 61 of mutual disposition, third valve rod 62 is fixed locate on normally closed valve 14 and with normally closed valve 14 integrated into one piece, fourth valve rod 61 is fixed locate on normally closed piston 8 and with normally closed piston 8 integrated into one piece, normally closed piston 8 set up fourth valve rod 61 one end and be conical, the section of thick bamboo chamber that is close to normally closed valve 14 one end of normally closed valve seat 17 also is conical, the conical end of normally closed piston 8 and the conical section of thick bamboo chamber phase-match of normally closed valve seat 17.

As shown in fig. 5, in the high-pressure bidirectional switching electric shutoff valve of the present invention, both the normally open pressure relief hole 27 and the normally closed pressure relief hole 9 are provided with a bleeding nozzle 54, the bleeding nozzle 54 is barrel-shaped, a barrel opening of the bleeding nozzle 54 is screwed to the normally open pressure relief hole 27/the normally closed pressure relief hole 9, a bleeding through hole 56 is provided on a barrel wall of the bleeding nozzle 54, and a leak detection through hole 55 is provided on a barrel bottom of the bleeding nozzle 54.

As shown in fig. 3 and fig. 4, in the high-pressure two-way switching electric stop valve of the present invention, a connecting cylinder 50 is fixedly arranged on the valve body 45, a valve seat 48 is hermetically sleeved in the connecting cylinder 50, one end of the valve seat 48 close to the valve body 45 is provided with the pilot valve cavity 33, one end of the valve seat 48 far away from the valve body 45 is provided with the ejector rod channel 2, a spring 49 is arranged between one end of the pilot valve 4 close to the pilot air inlet channel 19 and the valve body 45, a third annular boss 47 is arranged between the ejector rod channel 2 and the pilot valve cavity 33, one end of the ejector rod 34 close to the third annular boss 47 is provided with a columnar plug 46, one end of the pilot valve 4 close to the third annular boss 47 is conical, and the columnar plug 46 abuts against the conical end of the pilot valve 4 after passing through the third annular boss 47.

As shown in fig. 3, in conjunction with fig. 4, the high-pressure two-way switching electric cutoff valve of the invention, wherein the electromagnetic control device 1 includes a wire-wound shield 43, the coil 39 is wound on the periphery of the wire disk-shaped shielding sleeve 43, the static iron core 44 is fixedly arranged at the lower end of the inner cavity of the wire disk-shaped shielding sleeve 43, the movable iron core 41 is sleeved on the upper end of the inner cavity of the wire disc-shaped shielding sleeve 43, the connecting sleeve 51 is clamped at the lower end of the static iron core 44, the connecting sleeve 51 is connected to the connecting cylinder 50 in a threaded manner, the lower end of the static iron core 44 is abutted against the valve seat 48, an O-shaped sealing ring is arranged between the valve seat 48 and the connecting cylinder 50, one end of the ejector rod 34 far away from the third annular boss 47 penetrates through the static iron core 44 and then is fixedly connected to the movable iron core 41, a shell 40 is arranged on the outer side of the wire disc-shaped shielding sleeve 43, a cable connector 42 is arranged on the shell 40, and the cable connector 42 is electrically connected with the coil 39. The cable connector 42 is used for connecting a power supply.

The lower end of the stationary core 44 is screwed to the connecting cylinder 50 through a connecting sleeve 51, and the stationary core 44 and the valve seat 48 are in a compressed and fixed state at this time.

As shown in fig. 3 in combination with fig. 4, when the coil 39 is energized, the plunger 41 drives the plunger 34 to move toward the stationary core 44, so that the columnar plunger 46 pushes the pilot valve 4 to move toward the pilot inlet channel 19 until the pilot inlet channel 19 is closed (and the plunger channel 2 is opened), and in the process, the pilot valve 4 compresses the spring 49. When the coil 39 is de-energized, the compressed spring 49 is expanded, and the pilot shutter 4 moves toward the ram channel 2 until it is stopped at the third annular boss 47 under the elastic force of the spring 49, thereby closing the ram channel 2 (while opening the pilot intake channel 19).

Both ends of the pilot valve 4 are provided with an elastic sealing material (e.g., rubber) to enhance the sealing effect. When the pilot valve 4 closes the mandril channel 2, namely the conical end of the pilot valve 4 is propped against the third annular boss 47, the conical sealing is adopted at the position, so that the sealing effect is better. When the pilot valve 4 closes the pilot intake passage 19, a knife edge is provided on the valve body 45 on the periphery of the pilot intake passage 19 of the pilot valve chamber 33 to enhance the sealing effect with the pilot valve 4.

As shown in fig. 3 and 5, the high-pressure bidirectional switching electric stop valve of the present invention includes an air inlet nozzle 36 disposed on the air inlet 18, the air inlet nozzle 36 is cylindrical, one end of the air inlet nozzle 36 is connected to the air inlet 18 in a threaded manner, and the other end of the air inlet nozzle 36 is connected to the air inlet cap 35 in a threaded manner. An O-ring seal is provided between the nozzle 36 and the valve body 45 at the inlet 18 to seal the nozzle 36 to the inlet 18. When the present invention is not in use, the air intake cap 35 is screwed on the air intake nozzle 36 to prevent foreign materials such as dust from entering the air intake nozzle 36.

As shown in fig. 3, in the high-pressure two-way switching electric shutoff valve of the present invention, the normally open side air supply port 23 and the normally closed side air supply port 13 are both provided with air supply nozzles 37, the air supply nozzles 37 are cylindrical, one end of each air supply nozzle 37 is screwed and sealed to the normally open side air supply port 23/the normally closed side air supply port 13, the other end of each air supply nozzle 37 is screwed and connected to an air supply cap 38, and the valve body 45 is a regular polygon body. An O-ring seal is provided between the air supply nozzle 37 and the valve body 45 at the normally open side air supply port 23/the normally closed side air supply port 13 to hermetically connect the air supply nozzle 37 to the air supply port. When the present invention is not in use, the air supply cap 38 is screwed on the air supply nozzle 37 to prevent dust and other foreign materials from entering the air supply nozzle 37.

The high-pressure bidirectional switching electric stop valve is different from the prior art in that the high-pressure bidirectional switching electric stop valve is a combined form of a main valve and a pilot valve, a single-point control pilot type control structure is adopted, a normally closed side piston (namely the normally closed piston 8) of the main valve is controlled through the action of the pilot valve, and the normally closed piston 8 pushes a normally closed valve 14 to control the opening and closing of a normally closed side air passage; with the opening and closing of the pilot valve, the gas also makes the normally open side piston (namely the normally open piston 29) reciprocate at the same time, the normally open piston 29 pushes the normally open valve 22 to control the opening and closing of the normally open side gas path, and finally the bidirectional rapid and stable switching of the valve is realized. The high-pressure bidirectional switching electric stop valve comprehensively considers the reliability and manufacturability of products and parts, so that the high-pressure bidirectional switching electric stop valve has extremely high flexibility and reliability.

The normally open valve rod 26 between the normally open valve 22 and the normally open piston 29 in the invention is not an integral structure, but is designed into the first valve rod 52 integrally formed with the normally open valve 22 and the second valve rod 53 integrally formed with the normally open piston 29, that is, the normally open valve 22 and the normally open piston 29 are designed into a split structure, and the length of the normally open valve rod 26 is respectively processed on the normally open valve 22 and the normally open piston 29, so that the split structure enhances the strength of the normally open valve 22 and the normally open piston 29, the processing period is obviously shortened, the structural stability of the normally open valve 22 and the normally open piston 29 can be improved, and the stability of mutual action between the normally open valve 22 and the normally open piston 29 can also be improved. Similarly, the normally closed valve rod 11 between the normally closed valve 14 and the normally closed piston 8 in the invention also adopts the same structure as the normally open valve rod 26, and the structural stability of the normally closed valve 14 and the normally closed piston 8 and the stability of mutual action between the normally closed valve 14 and the normally closed piston can be improved.

In the invention, the normally open pressure relief hole 27 and the normally closed pressure relief hole 9 are both provided with the air relief nozzle 54, and the barrel bottom of the air relief nozzle 54 is provided with the leakage detection through hole 55, so that when the leakage detection of the air relief nozzle 54 is carried out, one end of the rubber tube can be connected with the outer barrel wall of the air relief nozzle 54 (at the moment, the air relief through hole 56 on the barrel wall is blocked by the rubber tube, the gas in the valve body 45 can enter the rubber tube through the leakage detection through hole 55), then the other end of the rubber tube is immersed in the leakage detection liquid, the high-pressure bidirectional switching electric stop valve is subjected to leakage detection by a bubble method, and the air tightness detection efficiency of the electric stop valve is improved.

The valve body 45 of the present invention is a regular polygon, so that the shape of the valve body 45 and the internal components of the valve body 45 can be easily processed, and the aerodynamic characteristics of the valve body 45 can be improved.

The normally closed valve 8 of the normally closed valve is controlled through the action of the pilot valve, and the normally closed valve 14 is pushed by the normally closed piston 8 to control the opening and closing of the air passage on the normally closed side; with the start and stop of the pilot valve, the gas also makes the normally open piston 29 of the normally open valve reciprocate at the same time, the normally open piston 29 pushes the normally open valve 22 to control the open and close of the normally open side gas path, finally the bidirectional rapid and stable switching of the invention is realized, the pressure building process curve of the normally open side and the normally closed side is shown in figure 6, and the switching of the pressure of the two sides after the single point of the pilot valve 4 is rapidly completed.

The working process of the invention is described below:

a power-off state: after the gas is introduced into the gas inlet 18 of the valve body 45, and when the electromagnetic control device 1 in the pilot valve is in the power-off state, as shown in fig. 1, the pilot valve 4 closes the post rod channel 2 (simultaneously opens the pilot gas inlet channel 19), the gas entering the valve body 45 from the gas inlet 18 is divided into three paths, the first path of gas flows to the normally closed gas inlet channel 16, the second path of gas flows to the pilot gas inlet channel 19, and the third path of gas flows to the normally open gas inlet channel 20. The second path of gas enters the pilot valve cavity 33 through the pilot gas inlet channel 19, then enters the normally closed back pressure cavity 6 of the normally closed piston cavity 7 through the second gas channel 5, and applies gas pressure to one end, far away from the normally closed valve rod 11, of the normally closed piston 8. The first path of gas acts on one end, far away from the normally closed valve rod 11, of the normally closed valve 14, and the gas pressure of the second path of gas acting on the normally closed piston 8 is greater than the gas pressure of the first path of gas acting on the normally closed valve 14, so that the normally closed piston 8 pushes the normally closed valve 14 to move towards the normally closed gas inlet channel 16 until the normally closed gas inlet channel 16 is closed (meanwhile, the normally closed valve rod through hole 12 is opened), and meanwhile, in the process, the gas in the normally closed pressure relief cavity 10 is exhausted from the normally closed pressure relief hole 9. The third route is gaseous often opens inlet channel 20 and gets into normally open valve chamber 21 and promotes normally open valve 22 and move to normally open valve seat 25 and until closing normally open valve rod through-hole 24 (open normally open inlet channel 20 simultaneously), and simultaneously at this in-process, the gas that is located normally open backpressure chamber 31 enters into normally closed valve chamber 15 through first gas passage 32, and then normally closed valve rod through-hole 12 enters into normally closed pressure release chamber 10 again, discharges from normally closed pressure release hole 9 at last. After the normally open valve 22 closes the normally open stem through hole 24, the gas introduced into the normally open valve chamber 21 is discharged from the normally open side gas supply port 23. It can be seen that the gas introduced into the valve body 45 from the gas inlet 18 is eventually discharged from only the normally open side gas supply port 23, that is, the gas is supplied from the normally open side gas supply port 23.

And (3) electrifying state: after the gas is introduced into the gas inlet 18 of the valve body 45, and the electromagnetic control device 1 in the pilot valve is in a power-on state, as shown in fig. 2, the pilot valve 4 closes the pilot gas inlet channel 19 (simultaneously opens the ejector rod channel 2), the gas entering the valve body 45 from the gas inlet 18 is divided into three paths, the first path of gas flows to the normally closed gas inlet channel 16, the second path of gas flows to the pilot gas inlet channel 19 (since the pilot valve 4 has closed the pilot gas inlet channel 19, the second path of gas is only filled in the pilot gas inlet channel 19), and the third path of gas flows to the normally open gas inlet channel 20. Because the pilot valve 4 also opens the mandril channel 2 while closing the pilot inlet channel 19, the gas in the normally closed back pressure cavity 6 enters the pilot valve cavity 33 through the second gas channel 5 and then is discharged from the pilot pressure relief hole 3 of the mandril channel 2, and simultaneously under the action of gas pressure difference, the first path of gas pushes the normally closed valve 14 to move towards the normally closed valve seat 17 until the normally closed valve rod through hole 12 is closed (the normally closed inlet channel 16 is opened at the same time), and then the first path of gas enters the normally closed valve cavity 15. The first path of gas entering the normally closed valve cavity 15 is divided into two parts, one part is discharged from the normally closed side gas supply port 13, the other part enters the normally open back pressure cavity 31 through the first gas channel 32, and applies gas pressure to one end of the normally open piston 29 far away from the normally open valve rod 26. The gas pressure is exerted to third route gas in keeping away from normally open valve rod 26 one end of normally open valve 22, because the gas pressure that the first way gas acted on normally open piston 29 is greater than the gas pressure that third route gas acted on normally open valve 22, consequently, normally open piston 29 promotes normally open valve 22 to normally open inlet channel 20 motion until closing normally open inlet channel 20 (open normally open valve rod through-hole 24 simultaneously), and simultaneously at this in-process, the gas that is located normally open pressure release chamber 28 is discharged from normally open pressure release hole 27. It can be seen that the gas entering the valve body 45 through the gas inlet 18 is eventually discharged from only the normally closed side gas supply port 13, that is, the gas is supplied from only the normally closed side gas supply port 13.

In order to enhance the sealing effect, elastic sealing materials (such as rubber) are arranged at two ends of the normally open valve 22, a knife edge is arranged on the valve body 45 at the periphery of the normally open air inlet channel 20 of the normally open valve cavity 21, and a knife edge is also arranged at one end, close to the normally open valve 22, of the normally open valve seat 25. Similarly, both ends of the normally closed valve 14 are provided with elastic sealing materials (such as rubber), a knife edge is arranged on the valve body 45 at the periphery of the normally closed air inlet channel 16 of the normally closed valve cavity 15, and a knife edge is also arranged at one end of the normally closed valve seat 17 close to the normally closed valve 14.

The invention has the following beneficial effects:

(1) the quick response switching function of the high-pressure bidirectional switching electric stop valve is realized;

(2) the split structure of the regular polygon valve body 45, the valve and the piston can improve the reliability and shorten the manufacturing period;

(3) and (5) rapidly detecting the air tightness.

The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.

Claims

1. The utility model provides a high pressure two-way switching electric stop valve which characterized in that: comprises a valve body, wherein a normally open valve, a normally closed valve and a pilot valve are arranged on the valve body, an air inlet, a normally open side air supply port and a normally closed side air supply port are arranged on the valve body,

2. The high-pressure bidirectional switching electric shutoff valve according to claim 1, characterized in that: be equipped with the normally open installation cavity that is used for installing normally open valve on the valve body, install normally open valve, normally open the valve seat, normally open the piston and normally open the blanking cover from inside to outside in proper order in the normally open installation cavity, normally open the valve seat and be the tube-shape, normally open the cylinder chamber of piston locating normally open the valve seat, the cylinder chamber of normally open the valve seat forms normally open the piston chamber, normally open the blanking cover and fix and locate in normally opening the installation cavity, the one end of normally open the valve seat offsets with normally open the blanking cover, the other end of normally open the valve seat offsets with the annular boss of normally opening on the installation cavity inner wall, normally open the valve seat and normally open between the installation cavity and normally open the blanking cover and normally open between the installation cavity and all be equipped with O type sealing washer.

3. The high-pressure bidirectional switching electric stop valve according to claim 2, characterized in that a normally open valve rod is arranged between the normally open valve and the normally open piston in a specific manner as follows: normally open the valve rod and include first valve rod and the second valve rod of mutual disposition, first valve rod is fixed locate on the normally open valve and with normally open valve integrated into one piece, the second valve rod is fixed locate on the normally open piston and with normally open piston integrated into one piece, the normally open piston set up second valve rod one end and be conical, the section of thick bamboo chamber that is close to normally open valve one end of normally open the valve seat also is conical, the conical end of normally open piston and the conical section of thick bamboo chamber phase-match of normally open the valve seat.

4. The high-pressure bidirectional switching electric shutoff valve according to claim 3, characterized in that: be equipped with the normally closed installation cavity that is used for installing the normally closed valve on the valve body, install normally closed valve, normally closed valve seat, normally closed piston and normally closed blanking cover from inside to outside in the normally closed installation cavity in proper order, normally closed valve seat is the tube-shape, the cylinder chamber of normally closed valve seat is located to the normally closed piston, the cylinder chamber of normally closed valve seat forms normally closed piston chamber, the normally closed blanking cover is fixed to be located in the normally closed installation cavity, the one end and the normally closed blanking cover of normally closed valve seat offset, the other end of normally closed valve seat offsets with the second annular boss on the normally closed installation cavity inner wall, all be equipped with O type sealing washer between normally closed valve seat and the normally closed installation cavity and between normally closed blanking cover and the normally closed installation cavity.

5. The high-pressure bidirectional switching electric stop valve according to claim 4, wherein a normally closed valve rod is arranged between the normally closed valve and the normally closed piston in a specific mode that: the normally closed valve rod includes mutual disposition's third valve rod and fourth valve rod, the third valve rod is fixed locate on the normally closed valve and with normally closed valve integrated into one piece, the fourth valve rod is fixed locate on the normally closed piston and with normally closed piston integrated into one piece, the normally closed piston set up fourth valve rod one end and be conical, the section of thick bamboo chamber that is close to normally closed valve one end of normally closed valve seat also is conical, the conical end of normally closed piston and the conical section of thick bamboo chamber phase-match of normally closed valve seat.

6. The high-pressure bidirectional switching electric shutoff valve according to claim 5, characterized in that: the air release valve is characterized in that air release nozzles are arranged on the normally open pressure release hole and the normally closed pressure release hole and are barrel-shaped, a barrel opening of each air release nozzle is connected to the normally open pressure release hole/the normally closed pressure release hole in a threaded mode, air release through holes are formed in the barrel wall of each air release nozzle, and leakage detection through holes are formed in the barrel bottom of each air release nozzle.

7. The high-pressure bidirectional switching electric shutoff valve according to claim 6, characterized in that: the valve body is fixedly provided with a connecting cylinder, a valve seat is hermetically sleeved in the connecting cylinder, a pilot valve cavity is arranged at one end, close to the valve body, of the valve seat, a push rod channel is arranged at one end, far away from the valve body, of the valve seat, a spring is arranged between one end, close to a pilot air inlet channel, of the pilot valve and the valve body, a third annular boss is arranged between the push rod channel and the pilot valve cavity, a columnar ejecting head is arranged at one end, close to the third annular boss, of the push rod, one end, close to the third annular boss, of the pilot valve is conical, and the columnar ejecting head abuts against the conical end of the pilot valve after penetrating through the third annular boss.

8. The high-pressure bidirectional switching electric shutoff valve according to claim 7, characterized in that: electromagnetic control device includes the coil form housing, the periphery winding of coil form housing has the coil, the fixed quiet iron core that is equipped with of inner chamber lower extreme of coil form housing, the inner chamber upper end cover of coil form housing is equipped with moves the iron core, the lower extreme joint of quiet iron core has the adapter sleeve, adapter sleeve threaded connection is on the connecting cylinder, the lower extreme and the disk seat of quiet iron core offset, be equipped with O type sealing washer between disk seat and the connecting cylinder, keeping away from third annular boss one end of ejector pin and passing behind the quiet iron core fixed connection on moving the iron core, the outside of coil form housing is equipped with the casing, be equipped with the cable joint on the casing, the cable joint is connected with the coil electricity.

9. The high-pressure bidirectional switching electric shutoff valve according to claim 8, characterized in that: the air inlet is provided with an air inlet nozzle, the air inlet nozzle is cylindrical, one end of the air inlet nozzle is in threaded sealing connection with the air inlet, and the other end of the air inlet nozzle is in threaded connection with an air inlet cap.

10. The high-pressure bidirectional switching electric shutoff valve according to claim 9, characterized in that: the valve is characterized in that air supply nozzles are arranged on the normally open side air supply port and the normally closed side air supply port respectively, the air supply nozzles are cylindrical, one end of each air supply nozzle is in threaded sealing connection with the normally open side air supply port/the normally closed side air supply port, the other end of each air supply nozzle is in threaded connection with an air supply cap, and the valve body is a regular polygon body.