CN105649953A - Gas path system used for multi-level dry vacuum pump - Google Patents
Gas path system used for multi-level dry vacuum pump Download PDFInfo
- Publication number
- CN105649953A CN105649953A CN201410629667.8A CN201410629667A CN105649953A CN 105649953 A CN105649953 A CN 105649953A CN 201410629667 A CN201410629667 A CN 201410629667A CN 105649953 A CN105649953 A CN 105649953A
- Authority
- CN
- China
- Prior art keywords
- gas circuit
- vacuum pump
- dry vacuum
- branch
- hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Abstract
The invention relates to the technical field of vacuum, in particular to a gas path system used for a multi-level dry vacuum pump. The gas path system comprises a gas path pressure adjusting assembly, a gas path flowmeter assembly and a gas inlet path, wherein the gas path pressure adjusting assembly, the gas path flowmeter assembly and the gas inlet path are connected in sequence; the gas path pressure adjusting assembly is connected with a master connector of a gas source end; the gas inlet path comprises a first gas path branch and a second gas path branch; the first gas path branch communicates with a sealing plate cavity in one end of the dry vacuum pump; the second gas path branch communicates with a sealing plate cavity in the other end of the dry vacuum pump, a second-level cavity and all levels of cavities between the second-level cavity and the sealing plate cavity in the other end of the dry vacuum pump; the first gas path branch and the second gas path branch are both provided with electromagnetic valves and controlled to be on or off through the electromagnetic valves connected to the corresponding gas path branches. According to the gas path system used for the multi-level dry vacuum pump, the gas path structure is topologically distributed, the gas ballasting requirements of the multiple cavities of the vacuum pump in a multi-channel gas distribution mode can be met simultaneously, the overall gas pumping performance of the vacuum pump is improved, and the occupied space is small.
Description
Technical field
The present invention relates to technical field of vacuum, specifically a kind of air-channel system for multi-stage dry vacuum pump.
Background technology
Lead in multi-stage dry vacuum pump into dry gas, it is possible to take away each revolution parts surface heat amount at a high speed in the pump housing by low-temperature airflow, reduce the temperature difference between itself and pump case; Being mixed into gas, before saturation vapour pressure when reaching pump temperature, pressurized gas reaches exhaust pressure simultaneously, is conducive to outside major part steam together blowdown pump, being equally also applicable to the cleaning work of the dust medium of residual and accumulation in pump.
The air-channel system of current multi-stage dry vacuum pump, distribution mode is most for flow through each room, chamber from pump intake, measures ingress flow by mass flowmeter or suspended body flowmeter, and exhaust side gaseous phase is unknown, and it is big that air-channel system takies space. For extracting under severe environment, under as higher in dust content or working temperature easily coagulability process gas time, room, chamber at different levels easily occurs overheated stuck, or the situation that complete machine final vacuum is inadequate.
Summary of the invention
For the problems referred to above, it is an object of the invention to provide a kind of air-channel system for multi-stage dry vacuum pump.
For achieving the above object, the present invention is by the following technical solutions:
A kind of air-channel system for multi-stage dry vacuum pump, comprise airline pressure and regulate assembly, gas circuit flow meter assembly and air inlet gas circuit, wherein airline pressure regulates assembly, gas circuit flow meter assembly and air inlet gas circuit connect successively, and airline pressure regulates assembly to be connected with the total interface of gas source, described air inlet gas circuit comprises gas circuit branch I and gas circuit branch II, one end-plate chamber of described gas circuit branch I and dry vacuum pump, the room, the other end shrouding chamber of described gas circuit branch II and dry vacuum pump, chamber at different levels between secondary cavity and secondary cavity to room, the other end shrouding chamber, described gas circuit branch I and gas circuit branch II is equipped with magnetic valve, and the solenoid control switch by connecting separately.
Described air inlet gas circuit comprises gas circuit weldment, branch road check valve assembly and welding side's head group part, multiple gas circuit arms that wherein gas circuit weldment comprises gas circuit supervisor and arranges successively along its length on gas circuit supervisor, the two ends of described gas circuit supervisor are provided with gas circuit pipe plug, described gas circuit main pipe is divided into described gas circuit branch I and gas circuit branch II by pipe joint, described gas circuit branch I and gas circuit branch II is equipped with air inlet port, wherein the end of gas circuit branch I is provided with for a gas circuit arm with an end-plate chamber of dry vacuum pump, described gas circuit branch II is provided with room, the other end shrouding chamber with dry vacuum pump respectively, the branched gas circuit arm of the chamber at different levels between secondary cavity and secondary cavity to room, the other end shrouding chamber, each gas circuit arm is equipped with branch road check valve assembly, and end is provided with the welding side's head group part for being connected with dry vacuum pump.
The end of the end gas circuit arm of described gas circuit branch II is provided with pressure transmitter pipeline, and one end of described pressure transmitter pipeline is provided with welding side's head group part, and the other end is connected with pressure-detecting device. The other end of described pressure transmitter pipeline is connected by collar nut and pressure-detecting device.
Described branch road check valve assembly comprises check valve body and current limliting screw, described current limliting screw thread is connected to the inside of check valve body and is provided with through hole on current limliting screw vertically, one end of described check valve body is connected with gas circuit arm, and the other end is connected with welding side's head group part. The end face side of having, one end type groove that described current limliting screw is corresponding with gas circuit arm. The other end of described check valve body is connected with welding side's head group part by adapter.
Described welding side head group part comprises welding side's head and through hole screw, wherein welding side's head is provided with center through hole, the sidewall of described welding side head is provided with the side opening being connected with this center through hole, one end of described through hole screw is inserted in the centre hole of welding side's head and is threaded, one end of described through hole screw is provided with axially extending bore, the sidewall of through hole screw is provided with the radial direction through hole being connected with this axially extending bore, and described check valve body is connected with the sidewall upper-side hole of welding side's head; Air-flow by branch road check valve assembly air outlet flow into through hole screw radial direction through hole and vertically through hole flow out.
The two ends of described through hole screw are thicker than centre and divide the center through hole whorl with welding side's head to be connected by two ends thicker part, leave gap between the middle narrower portion of described through hole screw and the center through-hole wall of the side's of welding head.
Advantage and the useful effect of the present invention be:
1. the present invention is by gas circuit structure topology distribution, can meet vacuum pump multiple Qiang Shiqi town demand under multichannel distribution mode simultaneously, and the overall pumping performance of lift pump, takies space less.
2. gas circuit upstream of the present invention connects gas flow control device, pressure regulating device, and gas circuit branch tail end is provided with pressure-detecting device, can Real-Time Monitoring and gather gas standard in pump, intuitive and reliable.
3. the present invention adopts distribution mode more versatile and flexible, promotes the pumping performance of vacuum pump entirety.
Accompanying drawing explanation
Fig. 1 is the structure block diagram of the present invention;
Fig. 2 is the schematic layout pattern that the present invention is applied to dry vacuum pump;
Fig. 3 is gas circuit assembly overall schematic of the present invention;
Fig. 4 is gas circuit weldment of the present invention each branch composition outside view;
Fig. 5 is check valve of the present invention and gas circuit head group part structural representation.
Wherein: 1 is gas circuit weldment, 101 is gas circuit pipe plug, 102 is pipe joint, 103 is gas circuit adapter I, 104 is gas circuit adapter II, 105 is gas circuit adapter III, 106 is gas circuit adapter IV, 107 is gas circuit adapter V, 2 is 90 �� of elbows, 3 is branch road check valve assembly, 301 is check valve body, 302 is current limliting screw, 303 is adapter, 4 is welding side's head group part, 401 is welding side's head, 402 is through hole screw, 5 is pressure transmitter pipeline, 6 is collar nut, 7 is air inlet port I, 8 is air inlet port II, A is dry vacuum pump, B is gas circuit branch I, C is gas circuit branch II.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in Figure 1 and Figure 2, the present invention comprises airline pressure and regulates assembly, gas circuit flow meter assembly and air inlet gas circuit, and wherein airline pressure regulates assembly, gas circuit flow meter assembly and air inlet gas circuit to connect successively and airline pressure regulates assembly to be connected with the total interface of gas source.Described gas circuit flow meter assembly, it is connected with straight-through, Y-junction respectively by mass flowmeter inlet, outlet side and forms, and outlet side is provided with dual gas channels. Described air inlet gas circuit comprises gas circuit branch IB and gas circuit branch IIC, the one end-plate chamber of described gas circuit branch IB and dry vacuum pump A, chamber at different levels between the room, the other end shrouding chamber of described gas circuit branch IIC and dry vacuum pump A, secondary cavity and secondary cavity to room, the other end shrouding chamber, described gas circuit branch IB and gas circuit branch IIC are equipped with magnetic valve and solenoid control switch by connecting separately.
Such as Fig. 3, shown in Fig. 4, described air inlet gas circuit comprises gas circuit weldment 1, branch road check valve assembly 3 and welding side's head group part 4, multiple gas circuit arms that wherein gas circuit weldment 1 comprises gas circuit supervisor and arranges successively along its length on gas circuit supervisor, the two ends of described gas circuit supervisor are provided with gas circuit pipe plug 101, described gas circuit main pipe is divided into described gas circuit branch IB and gas circuit branch IIC by pipe joint 102, described gas circuit branch IB and gas circuit branch IIC is equipped with air inlet port, wherein the end of gas circuit branch IB is provided with for the end-plate chamber gas circuit arm with dry vacuum pump A, described gas circuit branch IIC is provided with room, the other end shrouding chamber with dry vacuum pump A respectively, the branched gas circuit arm of the chamber at different levels between secondary cavity and secondary cavity to room, the other end shrouding chamber, each gas circuit arm is equipped with branch road check valve assembly 3, and end is provided with the welding side's head group part 4 for being connected with dry vacuum pump A. each gas circuit arm all can control air inlet break-make according to different distribution mode in real time. the end of the end gas circuit arm of described gas circuit branch IIC is provided with pressure transmitter pipeline 5, and one end of described pressure transmitter pipeline 5 is provided with welding side's head group part 4, and the other end is connected with pressure-detecting device by collar nut 6.
As shown in Figure 5, described branch road check valve assembly 3 comprises check valve body 301 and current limliting screw 302, described current limliting screw 302 is threadedly connected to the inside of check valve body 301 and is provided with through hole on current limliting screw 302 vertically, one end of described check valve body 301 is connected with gas circuit arm, and the other end is connected with welding side's head group part 4. The end face side of having, one end type groove that described current limliting screw 302 is corresponding with gas circuit arm, increases the contact area with air-flow, prevents the gas backflow effect that in pump chambers, hypertonia occurs at valve outlet port place. One end of described check valve body 301 is connected with gas circuit arm, and the other end is connected with welding side's head group part 4 by adapter 303. Described welding side head group part 4 comprises welding side 401 and through hole screw 402, and wherein the side of welding 401 is provided with center through hole, and the sidewall of described welding side 401 is provided with the side opening being connected with this center through hole. One end of described through hole screw 402 is inserted in the centre hole of welding side 401, the two ends of described through hole screw 402 are thicker than centre and divide the center through hole whorl with welding side 401 to be connected by two ends thicker part, leave gap between the middle narrower portion of described through hole screw 402 and the center through-hole wall of the side of welding 401. One end of described through hole screw 402 is provided with axially extending bore, and the sidewall of through hole screw 402 is provided with the radial direction through hole being connected with this axially extending bore. Described check valve body 301 is connected with the side opening of welding side 401 by adapter 303, air-flow by the radial direction through hole of the air outlet inflow through hole screw 402 of branch road check valve assembly 3 and through hole outflow vertically.End face both sides, welding side 401 are provided with O shape Jiao Quan with pump housing, through hole screw 402 end respectively, take plane extruding sealing means, through hole screw 402 are locked at lower end internal thread place, room, each chamber, ensure that each trim fits tightly.
The principle of work of the present invention is:
Source gas is successively realized the detection of gas flow and the adjustment of gaseous tension by under meter, reducing valve unit, and total gas circuit is divided into two air inlet branch roads. After gas distribution, each air inlet branch road is all by corresponding solenoid control switch, air-flow comes production well along gas circuit weldment supervisor, and wherein production well one, production well two distinguish corresponding gas circuit branch IB and gas circuit branch IIC, and each air inlet branch road all can control air inlet break-make according to different distribution mode in real time. Room, gas circuit branch IB gas flow pump housing shrouding chamber, gas circuit branch IIC is by multiple for gas flow room, pump body compression chamber and another room, shrouding chamber of the pump housing. For preventing backflowing, each gas circuit arm of whole air inlet gas circuit is respectively equipped with branch road check valve assembly 3. Valve outlet port place air-flow at each branch road check valve assembly 3 pours in welding side's head group part 4, and the radial hole along welding side's head group part 4 inner via hole screw 402 flows into, axially extending bore flows out, thus realizes the flow process that gas is conveyed into pump chamber. Pressure transmitter pipeline 5 one end of gas circuit branch IIC is connected pump chambers, and the other end is provided with the collar nut 6 of transition, for coordinating pressure-detecting device to use. The present invention can realize the detection function of vacuum pump body exhaust measuring pressure, avoids room, each chamber and the key part work problem such as overheated, also can meet the gas town demand of the pump housing simultaneously.
The present embodiment adopts Pyatyi dry vacuum pump, and described two gas circuit branches draw by same gas circuit weldment, and these weldment both sides are provided with the stifled confining gas passage of cylindrical tube, and weldment intermediate arrangement has cylinder-shaped joint, and pipeline is divided into two gas flows. Gas circuit weldment air inlet side and two 90 �� of elbows, side hole of giving vent to anger and five tracheae pipelines adopt running fit, and rear welding is made. Described air inlet branch, during air inlet, gas flows to branch road check valve assembly 3 along five branch's afterbody pipes, and gas pours in welding side's head group part 4 subsequently. In described gas circuit branch IB air-flow guiding room, pump housing shrouding chamber, gas circuit branch IIC air-flow leads in three rooms, pump body compression chamber and another room, shrouding chamber of the pump housing.
Claims (9)
1. the air-channel system for multi-stage dry vacuum pump, it is characterized in that: comprise airline pressure and regulate assembly, gas circuit flow meter assembly and air inlet gas circuit, wherein airline pressure regulates assembly, gas circuit flow meter assembly and air inlet gas circuit connect successively, and airline pressure regulates assembly to be connected with the total interface of gas source, described air inlet gas circuit comprises gas circuit branch I (B) and gas circuit branch II (C), one end-plate chamber of described gas circuit branch I (B) and dry vacuum pump (A), the room, the other end shrouding chamber of described gas circuit branch II (C) and dry vacuum pump (A), chamber at different levels between secondary cavity and secondary cavity to room, the other end shrouding chamber, described gas circuit branch I (B) and gas circuit branch II (C) are equipped with magnetic valve, and the solenoid control switch by connecting separately.
2. by the air-channel system for multi-stage dry vacuum pump according to claim 1, it is characterized in that: described air inlet gas circuit comprises gas circuit weldment (1), branch road check valve assembly (3) and welding side's head group part (4), multiple gas circuit arms that wherein gas circuit weldment (1) comprises gas circuit supervisor and arranges successively along its length on gas circuit supervisor, the two ends of described gas circuit supervisor are provided with gas circuit pipe plug (101), described gas circuit main pipe is divided into described gas circuit branch I (B) and gas circuit branch II (C) by pipe joint (102), described gas circuit branch I (B) and gas circuit branch II (C) are equipped with air inlet port, wherein the end of gas circuit branch I (B) is provided with for a gas circuit arm with an end-plate chamber of dry vacuum pump (A), described gas circuit branch II (C) is provided with room, the other end shrouding chamber with dry vacuum pump (A) respectively, the branched gas circuit arm of the chamber at different levels between secondary cavity and secondary cavity to room, the other end shrouding chamber, each gas circuit arm is equipped with branch road check valve assembly (3), and end is provided with welding side's head group part (4) for being connected with dry vacuum pump (A).
3. by the air-channel system for multi-stage dry vacuum pump according to claim 2, it is characterized in that: the end of the end gas circuit arm of described gas circuit branch II (C) is provided with pressure transmitter pipeline (5), one end of described pressure transmitter pipeline (5) is provided with welding side's head group part (4), and the other end is connected with pressure-detecting device.
4. by the air-channel system for multi-stage dry vacuum pump according to claim 3, it is characterised in that: the other end of described pressure transmitter pipeline (5) is connected by collar nut (6) and pressure-detecting device.
5. by the air-channel system for multi-stage dry vacuum pump according to claim 2, it is characterized in that: described branch road check valve assembly (3) comprises check valve body (301) and current limliting screw (302), described current limliting screw (302) is threadedly connected to the inside of check valve body (301) and is provided with through hole vertically on current limliting screw (302), one end of described check valve body (301) is connected with gas circuit arm, and the other end is connected with welding side's head group part (4).
6. by the air-channel system for multi-stage dry vacuum pump according to claim 5, it is characterised in that: the end face side of having, one end type groove that described current limliting screw (302) is corresponding with gas circuit arm.
7. by the air-channel system for multi-stage dry vacuum pump according to claim 5, it is characterised in that: the other end of described check valve body (301) is connected with welding side's head group part (4) by adapter (303).
8. by the air-channel system for multi-stage dry vacuum pump described in the arbitrary item of claim 2-7, it is characterized in that: described welding side's head group part (4) comprises welding side's head (401) and through hole screw (402), wherein welding side's head (401) is provided with center through hole, the sidewall of described welding side head (401) is provided with the side opening being connected with this center through hole, one end of described through hole screw (402) is inserted in the centre hole of welding side's head (401), and be threaded, one end of described through hole screw (402) is provided with axially extending bore, the sidewall of through hole screw (402) is provided with the radial direction through hole being connected with this axially extending bore, described check valve body (301) is connected with the sidewall upper-side hole of welding side's head (401), air-flow by branch road check valve assembly (3) air outlet flow into through hole screw (402) radial direction through hole and vertically through hole flow out.
9. by the air-channel system for multi-stage dry vacuum pump according to claim 8, it is characterized in that: the two ends of described through hole screw (402) are thicker than centre and divide the center through hole whorl with welding side's head (401) to be connected by two ends thicker part, leave gap between the middle narrower portion of described through hole screw (402) and the center through-hole wall of the side's of welding head (401).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410629667.8A CN105649953A (en) | 2014-11-11 | 2014-11-11 | Gas path system used for multi-level dry vacuum pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410629667.8A CN105649953A (en) | 2014-11-11 | 2014-11-11 | Gas path system used for multi-level dry vacuum pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105649953A true CN105649953A (en) | 2016-06-08 |
Family
ID=56483649
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410629667.8A Pending CN105649953A (en) | 2014-11-11 | 2014-11-11 | Gas path system used for multi-level dry vacuum pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105649953A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107782511A (en) * | 2017-10-18 | 2018-03-09 | 歌尔股份有限公司 | Air-tightness detection device and detection method |
| CN114593036A (en) * | 2020-12-07 | 2022-06-07 | 中国科学院沈阳科学仪器股份有限公司 | Gas path distribution system for multistage dry vacuum pump |
| CN116337176A (en) * | 2023-05-23 | 2023-06-27 | 中国空气动力研究与发展中心高速空气动力研究所 | Extraction quantity testing method for large water ring pump parallel vacuum system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5925120B2 (en) * | 1979-02-18 | 1984-06-14 | 三国重工業株式会社 | Reciprocating vacuum pump shaft seal gas leak prevention device |
| CN201074591Y (en) * | 2007-09-07 | 2008-06-18 | 中国科学院沈阳科学仪器研制中心有限公司 | Multilevel Roots dry vacuum pump for straight discharging atmosphere |
| CN201200981Y (en) * | 2008-06-06 | 2009-03-04 | 中国科学院沈阳科学仪器研制中心有限公司 | Cleaner of multilevel dry-type vacuum pump |
| CN101660532A (en) * | 2008-08-29 | 2010-03-03 | 中国科学院沈阳科学仪器研制中心有限公司 | Water-cooling system of multi-stage dry vacuum pump |
| CN202789526U (en) * | 2012-06-14 | 2013-03-13 | 淄博华中真空设备有限公司 | Double-air-cooling type Root's vacuum pump |
-
2014
- 2014-11-11 CN CN201410629667.8A patent/CN105649953A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5925120B2 (en) * | 1979-02-18 | 1984-06-14 | 三国重工業株式会社 | Reciprocating vacuum pump shaft seal gas leak prevention device |
| CN201074591Y (en) * | 2007-09-07 | 2008-06-18 | 中国科学院沈阳科学仪器研制中心有限公司 | Multilevel Roots dry vacuum pump for straight discharging atmosphere |
| CN201200981Y (en) * | 2008-06-06 | 2009-03-04 | 中国科学院沈阳科学仪器研制中心有限公司 | Cleaner of multilevel dry-type vacuum pump |
| CN101660532A (en) * | 2008-08-29 | 2010-03-03 | 中国科学院沈阳科学仪器研制中心有限公司 | Water-cooling system of multi-stage dry vacuum pump |
| CN202789526U (en) * | 2012-06-14 | 2013-03-13 | 淄博华中真空设备有限公司 | Double-air-cooling type Root's vacuum pump |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107782511A (en) * | 2017-10-18 | 2018-03-09 | 歌尔股份有限公司 | Air-tightness detection device and detection method |
| CN107782511B (en) * | 2017-10-18 | 2019-08-23 | 歌尔股份有限公司 | Air-tightness detection device and detection method |
| CN114593036A (en) * | 2020-12-07 | 2022-06-07 | 中国科学院沈阳科学仪器股份有限公司 | Gas path distribution system for multistage dry vacuum pump |
| CN116337176A (en) * | 2023-05-23 | 2023-06-27 | 中国空气动力研究与发展中心高速空气动力研究所 | Extraction quantity testing method for large water ring pump parallel vacuum system |
| CN116337176B (en) * | 2023-05-23 | 2023-07-21 | 中国空气动力研究与发展中心高速空气动力研究所 | Extraction quantity testing method for large water ring pump parallel vacuum system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| MX2020009375A (en) | Manifold and fluid flow control. | |
| CN105649953A (en) | Gas path system used for multi-level dry vacuum pump | |
| WO2008045835A3 (en) | Flow control systems and control valves therefor | |
| CN110480966A (en) | Injection mould cooling system | |
| CN206234420U (en) | A kind of air pressure relief valve | |
| CN202152773U (en) | Reciprocating control mechanism of air cylinder | |
| CN203604083U (en) | Intake manifold and engine | |
| CN206234398U (en) | three-way shuttle valve | |
| CN208010489U (en) | Engine charge tube assembly | |
| CN207004958U (en) | Flush pneumatic integrated system and its pneumatic module | |
| CN210029245U (en) | Pneumatic conveying pipeline gas distribution system | |
| CN204628612U (en) | A kind of cut-off valve for silica gel pipeline | |
| CN204901337U (en) | Integrated valve body of liquefied natural gas gas cylinder | |
| CN209179922U (en) | The choke plug structure and low pressure oil way of common rail fuel combustion system low pressure oil way | |
| CN203641744U (en) | Water distributor with water pressure balancing function | |
| CN201273377Y (en) | Gas valve | |
| CN206655983U (en) | A kind of copper bar air valve | |
| CN205352360U (en) | Confession exhaust apparatus is used to engineering child not roundness detection | |
| CN205559397U (en) | Backward flow cavate liquid stream check valve | |
| CN207005393U (en) | Double discharge structures are collected in a kind of micro- leakage | |
| CN106382387A (en) | Three-way shuttle valve | |
| CN207538948U (en) | A kind of inlet manifold | |
| CN203477312U (en) | Sealing structure of energy accumulator of numerical control waterjet cutting machine | |
| CN208123669U (en) | A kind of regeneration tolerance valve | |
| CN216279994U (en) | Integrated form aftertreatment drainage device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160608 |
|
| WD01 | Invention patent application deemed withdrawn after publication |