JPH062349A - Suction and exhaust switching construction of pipe line - Google Patents
Suction and exhaust switching construction of pipe lineInfo
- Publication number
- JPH062349A JPH062349A JP16090792A JP16090792A JPH062349A JP H062349 A JPH062349 A JP H062349A JP 16090792 A JP16090792 A JP 16090792A JP 16090792 A JP16090792 A JP 16090792A JP H062349 A JPH062349 A JP H062349A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- exhaust
- intake
- port
- air
- 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.)
- Granted
Links
Landscapes
- Sink And Installation For Waste Water (AREA)
- Sewage (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、たとえば下水管などの
通水管に対し吸気または排気の実行、吸・排気の複合的
な実行あるいは吸・排気の停止などを要求に応じて選択
して行うことのできる管路の吸排気切替え構造に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention selectively performs, for example, intake or exhaust of a water pipe such as a sewer pipe, combined execution of intake / exhaust, or stop of intake / exhaust according to requirements. The present invention relates to an intake / exhaust switching structure for a pipe line.
【０００２】[0002]
【従来の技術】図８に示す下水管などの通水管１の空気
抜き（排気）を、通水管１に連通して取付けた空気弁
（排気弁）２によって行う技術は既に知られており、一
般に、空気弁２は、補修弁Ｖを介して通水管１に接続さ
れている。したがって、補修弁Ｖを開位置に保持するこ
とで、通水管１の排気または通水管１への吸気が可能な
状態を確保でき、補修弁Ｖを閉位置に保持することで、
前記吸気および排気の両者の停止状態を確保することが
できる。2. Description of the Related Art A technique for venting (exhausting) a water pipe 1 such as a sewer pipe shown in FIG. 8 by means of an air valve (exhaust valve) 2 connected to the water pipe 1 is already known and generally known. The air valve 2 is connected to the water pipe 1 via the repair valve V. Therefore, by holding the repair valve V in the open position, it is possible to secure a state in which the water pipe 1 can be exhausted or the water pipe 1 can be taken in, and by holding the repair valve V in the closed position,
It is possible to secure the stopped state of both the intake air and the exhaust air.
【０００３】ところで、通水管１に対して、吸気のみ
の実行、排気のみの実行、吸・排気の複合的な実
行、吸・排気の停止などが要求される。しかし、前記
従来の空気弁２と補修弁Ｖによって構成した吸・排気切
替え構造では、補修弁Ｖの切替え操作により、吸気また
は排気の実行と、吸・排気の停止を実行することはでき
るけれど、前記、の吸気のみまたは排気のみを独自
に実行することができない難点を有し、これらの要求に
応じ得ない欠点がある。By the way, the water pipe 1 is required to perform only intake, only exhaust, combined intake / exhaust, and stop intake / exhaust. However, in the intake / exhaust switching structure constituted by the conventional air valve 2 and the repair valve V, it is possible to perform intake or exhaust and stop intake / exhaust by switching the repair valve V. There is a drawback that it is impossible to independently perform only intake or exhaust only, and there is a drawback that these requirements cannot be met.
【０００４】[0004]
【発明が解決しようとする課題】解決しようとする問題
点は、吸気のみまたは排気のみを独自に実行することが
できない点である。The problem to be solved is that it is impossible to independently perform only intake or exhaust.
【０００５】[0005]
【課題を解決するための手段】請求項１の発明は、通水
管に連通して空気弁を取付け、この空気弁の吸・排気孔
に吸気ポ−トと排気ポ−トを備えた切替弁の接続ポ−ト
を接続するとともに、前記吸気ポ−トに通水管への吸気
を許容する第１逆止弁を取付け、前記排気ポ−トに通水
管からの排気を許容する第２逆止弁を取付けたことを特
徴とし、通水管に対して吸気のみまたは排気のみを独自
に実行する目的を達成した。According to a first aspect of the present invention, there is provided a switching valve having an air valve connected to a water pipe and having an intake port and an exhaust port in intake and exhaust holes of the air valve. And a second check valve for allowing the intake port to allow intake to the water pipe and the exhaust port for allowing exhaust from the water pipe. It is characterized by installing a valve, and achieved the purpose of independently performing only intake or exhaust to the water pipe.
【０００６】請求項２の発明は、通水管に吸・排気孔を
設け、この吸・排気孔に吸気ポ−トと排気ポ−トを備え
た切替弁の接続ポ−トを接続するとともに、前記吸気ポ
−トに通水管への吸気を許容する第１逆止弁を取付け、
前記排気ポ−トに通水管からの排気を許容する第２逆止
弁を取付けたことを特徴とし、通水管に対して吸気のみ
または排気のみを独自に実行する目的を達成した。According to the second aspect of the present invention, the water passage is provided with an intake / exhaust hole, and the intake / exhaust hole is connected to a connection port of a switching valve having an intake port and an exhaust port. A first check valve for allowing intake to the water pipe is attached to the intake port,
A second check valve that allows exhaust from the water pipe is attached to the exhaust port, and the purpose of independently performing only intake or exhaust to the water pipe is achieved.
【０００７】[0007]
【作用】請求項１の発明によれば、切替弁を切替操作す
ることで、空気弁を介して通水管に対し、吸気のみの実
行、排気のみの実行、吸・排気の複合的な実行および吸
・排気の停止を選択することができる。According to the first aspect of the present invention, by performing the switching operation of the switching valve, it is possible to perform only intake, only exhaust, and combined intake and exhaust for the water pipe through the air valve. You can choose to stop intake and exhaust.
【０００８】請求項２の発明によれば、切替弁を切替操
作することで、空気弁を省略して通水管に対し、吸気の
みの実行、排気のみの実行、吸・排気の複合的な実行お
よび吸・排気の停止を選択することができる。According to the second aspect of the present invention, by performing the switching operation of the switching valve, the air valve is omitted and only the intake of the water pipe, the execution of the exhaust only, and the combined execution of the intake and the exhaust are performed. It is also possible to select stop of intake and exhaust.
【０００９】[0009]
【実施例】以下、本発明の実施例を図面に基づいて説明
する。図１は、第１発明の実施例を示す縦断面図であ
る。この図において、空気弁２は、通水管１に連通して
取付けられた弁箱２Ａと、弁箱２Ａの内部に収容された
フロ−ト３と、フロ−ト３に取付けられて上方にのびる
弁棒４と、この弁棒４に対してピン５を介して連結さ
れ、上下方向の長孔６の長さに略対応する相対移動量を
有して、弁棒４の上側に連結された弁体７を具備してい
る。弁体７は、下端部に小さい空気孔７ａを設けた中空
軸部７Ａと、この中空軸部７Ａの下端部において径外方
向に張出し形成したフランジ部７Ｂとを有し、フランジ
部７Ｂが弁箱２Ａの上部に着脱可能に取付けられた弁箱
カバ−８内に位置している。弁箱カバ−８の上部にシ−
ト受け９が取付けられ、このシ−ト受け９に形成した弁
孔９Ａ周辺部の下向きの弁座９Ｂに、弁体７のフランジ
部７Ｂの上面に取付けられている環状のシ−ル部材７ｂ
が対向している。シ−ト受け９には、吸・排気孔１０を
介して大気に連通する吸・排気室１０Ａが形成されてお
り、その上部にダイヤフラム装置１１が取付けられてい
る。また、中空軸部７Ａは、弁孔９Ａからシ−ト受け９
の吸・排気室１０Ａを通ってダイヤフラム装置１１内に
摺動自在に挿通され、その上端部にダイヤフラム１１Ａ
を取付け、スプリング１２によって常時閉弁方向（上方
向）に付勢されており、上部圧力室１１Ｂはエアノズル
１１ｂを介して大気に連通している。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a vertical sectional view showing an embodiment of the first invention. In this figure, an air valve 2 is installed in communication with the water pipe 1, a valve box 2A, a float 3 accommodated inside the valve box 2A, and an air valve 2 attached to the float 3 and extend upward. The valve rod 4 is connected to the valve rod 4 via a pin 5, and has a relative movement amount substantially corresponding to the length of the elongated hole 6 in the vertical direction, and is connected to the upper side of the valve rod 4. The valve body 7 is provided. The valve body 7 has a hollow shaft portion 7A having a small air hole 7a at a lower end portion thereof, and a flange portion 7B radially outwardly formed at a lower end portion of the hollow shaft portion 7A. It is located in a valve box cover 8 which is detachably attached to the upper part of the box 2A. A seal is placed on the top of the valve box cover 8.
An annular seal member 7b is attached to the upper surface of the flange portion 7B of the valve body 7 on the downward valve seat 9B around the valve hole 9A formed in the sheet receiver 9.
Are facing each other. An intake / exhaust chamber 10A communicating with the atmosphere via an intake / exhaust hole 10 is formed in the sheet receiver 9, and a diaphragm device 11 is attached to the upper part thereof. In addition, the hollow shaft portion 7A receives the seat receiving 9 from the valve hole 9A.
Of the diaphragm 11A is slidably inserted into the diaphragm device 11 through the suction / exhaust chamber 10A of the diaphragm 11A.
, And is normally urged in the valve closing direction (upward direction) by the spring 12, and the upper pressure chamber 11B communicates with the atmosphere via the air nozzle 11b.
【００１０】一方、空気弁２の吸・排気孔１０には、管
路１３を介して切替弁１４の接続ポ−ト１４Ａが接続さ
れている。切替弁１４は、たとえば吸気ポ−ト１４Ｂと
排気ポ−ト１４Ｃを備えたロ−タリ式切替弁によってな
り、吸気ポ−ト１４Ｂに通水管１への吸気を許容する第
１逆止弁１５を取付け、排気ポ−ト１４Ｃに通水管１か
らの排気を許容する第２逆止弁１６が取付けられてい
る。On the other hand, a connection port 14A of a switching valve 14 is connected to the intake / exhaust hole 10 of the air valve 2 via a pipe line 13. The switching valve 14 is, for example, a rotary type switching valve having an intake port 14B and an exhaust port 14C, and the first check valve 15 for allowing the intake port 14B to intake air to the water pipe 1 is provided. The second check valve 16 which allows the exhaust from the water pipe 1 is attached to the exhaust port 14C.
【００１１】つぎに、前記構成の作動について説明す
る。通水管１の配管が完了した時点では、フロ−ト３が
垂れ下がり、弁体７はスプリング１２のばね力で上昇し
て、フランジ部７Ｂのシ−ル部材７ｂがシ−ト受け９の
弁座９Ｂに密着した閉弁状態、すなわち弁箱２Ａと吸・
排気室１０Ａの連通が遮断されている状態に保持され
る。そのために、通水管１内の空気は、弁箱２Ａから弁
体７の小さい空気孔７ａを通ってダイヤフラム装置１１
の上部圧力室１１Ｂに入り、ここからエアノズル１１ｂ
を通って排気（初期排気）される。Next, the operation of the above configuration will be described. When the piping of the water passage pipe 1 is completed, the float 3 hangs down, the valve body 7 rises by the spring force of the spring 12, and the seal member 7b of the flange portion 7B moves to the valve seat of the seat receiver 9. 9B closed valve state, that is, valve box 2A sucks and
The exhaust chamber 10A is maintained in a state in which communication is cut off. Therefore, the air in the water pipe 1 passes through the small air hole 7a of the valve body 7 from the valve box 2A and the diaphragm device 11
Enters into the upper pressure chamber 11B of the air nozzle 11b
It is exhausted through (initial exhaust).
【００１２】通水管１への充水作業によって、通水管１
および弁箱２内の空気圧が高くなると、圧力室１１Ｂも
高圧になり、スプリング１２のばね力に抗してダイヤフ
ラム１１Ａを押し下げ、ピン５を介して弁体７も押し下
げるので、図２のようにフランジ部７Ｂのシ−ル部材７
ｂをシ−ト受け９の弁座９Ｂから離間させた開弁状態に
なる。あらかじめ、切替弁１４の接続ポ−ト１４Ａと排
気ポ−ト１４Ｃを連通させた位置に切替えておけば、弁
箱２Ａの内部は、弁孔９Ａ→吸・排気室１０Ａ→吸・排
気ポ−ト１０→管路１３→切替弁１４の接続ポ−ト１４
Ａ→排気ポ−ト１４Ｃ→第２逆止弁１６の経路によっ
て、通水管１および弁箱２Ａ内の高圧空気の多量排気
（圧力下多量排気）がなされて、下水が弁箱２に進入す
る。By filling the water pipe 1 with water, the water pipe 1
When the air pressure in the valve box 2 becomes high, the pressure chamber 11B also becomes high in pressure, and the diaphragm 11A is pressed down against the spring force of the spring 12, and the valve body 7 is also pressed down via the pin 5, so that as shown in FIG. Seal member 7 of flange portion 7B
b is separated from the seat 9B of the seat receiver 9 to open the valve. If the connection port 14A of the switching valve 14 and the exhaust port 14C are switched to a position in which they communicate with each other in advance, the inside of the valve box 2A will have a valve hole 9A → intake / exhaust chamber 10A → intake / exhaust port. Port 10 → Pipe 13 → Switching valve 14 Connection port 14
By the route of A → exhaust port 14C → second check valve 16, a large amount of high pressure air in the water pipe 1 and the valve box 2A is exhausted (a large amount under pressure), and the sewage enters the valve box 2. .
【００１３】弁箱２Ａ内への下水の進入によってフロ−
ト３に浮力が生じて上昇し、弁棒４の上端で弁体７の小
さい空気孔７ａを閉塞して、弁体７を突き上げる。した
がって、図３のように弁孔９Ａが閉じられ、弁箱２Ａ内
の空気だまり１７に空気を閉じ込めた閉弁（充水閉止）
状態になる。このように閉弁された後に、通水管１内の
下水に混入している空気が弁箱２Ａ内に進入すると、空
気だまり１７の圧力が高くなり、弁箱２Ａ内の下水面を
下げる。そのために、フロ−ト３の喫水が低くなり喫水
の低下分だけフロ−ト３の浮力を小さくして下降させ、
図２のようにフランジ部７Ｂのシ−ル部材７ｂをシ−ト
受け９の弁座９Ｂから離間させた開弁状態になり、圧力
排気がなされる。The flow of sewage into the valve box 2A causes a flow.
The buoyancy is generated in the valve 3 and the valve 3 rises to close the small air hole 7a of the valve body 7 at the upper end of the valve rod 4 and push up the valve body 7. Therefore, as shown in FIG. 3, the valve hole 9A is closed and the air is closed in the air reservoir 17 in the valve box 2A (filling water is closed).
It becomes a state. After the valve is closed in this manner, when the air mixed in the sewage in the water pipe 1 enters the valve box 2A, the pressure of the air reservoir 17 increases, and the sewage surface in the valve box 2A is lowered. For that reason, the draft of the float 3 becomes low, and the buoyancy of the float 3 is reduced by the amount of the decrease in the draft to lower it.
As shown in FIG. 2, the seal member 7b of the flange portion 7B is opened from the valve seat 9B of the seat receiver 9 to open the valve, and the pressure is exhausted.
【００１４】通水管１および弁箱２Ａ内部の負圧化によ
り吸気を必要とする場合には、図４のように、切替弁１
４の接続ポ−ト１４Ａと吸気ポ−ト１４Ｂを連通させた
位置に切替える。その結果、第１逆止弁１５→吸気ポ−
ト１４Ｂ→接続ポ−ト１４Ａ→管路１３→吸・排気室１
０Ａの経路で弁体７に大気圧が負荷され、弁体７を押し
下げる。したがって、多量の空気を吸い込む吸気がなさ
れる。When intake air is required due to the negative pressure inside the water pipe 1 and the valve box 2A, as shown in FIG.
The connection port 14A of No. 4 and the intake port 14B are switched to the position in which they communicate with each other. As a result, the first check valve 15 → intake port
Port 14B → Connection port 14A → Pipe line 13 → Suction / exhaust chamber 1
Atmospheric pressure is applied to the valve body 7 through the path of 0 A, and the valve body 7 is pushed down. Therefore, intake is performed by sucking a large amount of air.
【００１５】また、図５のように、切替弁１４の接続ポ
−ト１４Ａと吸気ポ−ト１４Ｂおよび排気ポ−ト１４Ｃ
を同時にを連通させた位置に切替えることで、吸・排気
の複合的な実行を可能にする。さらに、図６のように、
切替弁１４の接続ポ−ト１４Ａ、吸気ポ−ト１４Ｂおよ
び排気ポ−ト１４Ｃの三者の連通を同時に遮断する位置
に切替えることで、吸・排気の両者を停止させることが
できる。As shown in FIG. 5, the connection port 14A of the switching valve 14, the intake port 14B and the exhaust port 14C.
By switching to the position where both are communicated at the same time, it is possible to perform combined intake and exhaust. Furthermore, as shown in FIG.
Both the intake and the exhaust can be stopped by switching to a position where the communication of the connection port 14A, the intake port 14B and the exhaust port 14C of the switching valve 14 is simultaneously cut off.
【００１６】図７は、第２発明の実施例を示す系統図で
ある。なお、前記第１発明と同一もしくは相当部分には
同一符号を付して説明する。この図において、通水管１
に吸・排気孔１Ａを設け、この吸・排気孔１Ａには、管
路１３を介して切替弁１４の接続ポ−ト１４Ａが接続さ
れている。切替弁１４は、前述と同様の吸気ポ−ト１４
Ｂと排気ポ−ト１４Ｃを備えたロ−タリ式切替弁によっ
てなり、吸気ポ−ト１４Ｂに通水管１への吸気を許容す
る第１逆止弁１５を取付け、排気ポ−ト１４Ｃに通水管
１からの排気を許容する第２逆止弁１６が取付けられて
いる。FIG. 7 is a system diagram showing an embodiment of the second invention. The same or corresponding parts as those of the first invention will be described with the same reference numerals. In this figure, the water pipe 1
An intake / exhaust hole 1A is provided at the intake / exhaust hole 1A, and a connection port 14A of a switching valve 14 is connected to the intake / exhaust hole 1A via a pipe line 13. The switching valve 14 is the intake port 14 similar to that described above.
B and an exhaust port 14C, which is a rotary type switching valve. The intake port 14B is provided with a first check valve 15 which allows intake to the water pipe 1, and the exhaust port 14C is connected to the first check valve 15. A second check valve 16 that allows exhaust from the water pipe 1 is attached.
【００１７】このような構成であれば、切替弁１４を第
１発明で説明した４位置に切替えることで、通水管１に
対する吸気のみの実行、排気のみの実行、吸・排気の複
合的な実行および吸・排気の停止などの要求に対応でき
る。すなわち、空気弁２の使用を省略した構造により、
吸気、排気、吸・排気の複合および吸・排気の停止を選
択して実行できる。With such a configuration, by switching the switching valve 14 to the four positions described in the first aspect of the invention, only the intake of the water pipe 1 is performed, only the exhaust is performed, and the combined intake / exhaust is performed. And it can respond to requests such as stop of intake and exhaust. That is, with the structure in which the use of the air valve 2 is omitted,
Intake, exhaust, combined intake / exhaust and stop of intake / exhaust can be selected and executed.
【００１８】[0018]
【発明の効果】以上説明したように、請求項１の発明
は、切替弁を切替操作することで、空気弁を介して、通
水管に対し吸・排気の複合および吸・排気の停止を実行
させることができるとともに、吸気のみの実行または排
気のみの実行を選択することもできる。As described above, according to the first aspect of the present invention, by performing the switching operation of the switching valve, the intake / exhaust is combined and the intake / exhaust is stopped for the water pipe via the air valve. In addition to the above, it is possible to select the execution of only the intake or the execution of the exhaust.
【００１９】また、請求項２の発明は、切替弁を切替操
作することで、空気弁を省略した簡単な構造で、通水管
に対し吸・排気の複合および吸・排気の停止を実行させ
ることができるとともに、吸気のみの実行または排気の
みの実行を選択することもできる。Further, according to the second aspect of the present invention, by performing a switching operation of the switching valve, it is possible to cause the water pipe to perform the combined intake / exhaust and stop the intake / exhaust with a simple structure without the air valve. In addition to the above, it is also possible to select execution of only intake or execution of only exhaust.
【図１】第１発明の実施例を示す縦断面図である。FIG. 1 is a vertical sectional view showing an embodiment of the first invention.
【図２】排気状態を示す拡大断面図である。FIG. 2 is an enlarged cross-sectional view showing an exhaust state.
【図３】空気弁の充水閉止状態を示す拡大断面図であ
る。FIG. 3 is an enlarged cross-sectional view showing a closed state of the air valve filled with water.
【図４】吸気状態を示す拡大断面図である。FIG. 4 is an enlarged cross-sectional view showing an intake state.
【図５】切替弁の吸・排気の複合切替え状態を示す拡大
断面図である。FIG. 5 is an enlarged sectional view showing a combined switching state of intake and exhaust of the switching valve.
【図６】切替弁の吸・排気の停止切替え状態を示す拡大
断面図である。FIG. 6 is an enlarged cross-sectional view showing a state in which the switching valve stops switching between intake and exhaust.
【図７】第２発明の実施例を示す系統図である。FIG. 7 is a system diagram showing an embodiment of the second invention.
【図８】従来の吸・排気切替え構造を示す説明図であ
る。FIG. 8 is an explanatory view showing a conventional intake / exhaust switching structure.
１ 通水管 ２ 空気弁 １０ 吸・排気孔 １４ 切替弁 １４Ａ 切替弁の接続ポ−ト １４Ｂ 切替弁の吸気ポ−ト １４Ｃ 切替弁の排気ポ−ト １５ 第１逆止弁 １６ 第２逆止弁 1 Water Pipe 2 Air Valve 10 Intake / Exhaust Hole 14 Switching Valve 14A Switching Valve Connection Port 14B Switching Valve Intake Port 14C Switching Valve Exhaust Port 15 First Check Valve 16 Second Check Valve
Claims (2)
空気弁の吸・排気孔に吸気ポ−トと排気ポ−トを備えた
切替弁の接続ポ−トを接続するとともに、前記吸気ポ−
トに通水管への吸気を許容する第１逆止弁を取付け、前
記排気ポ−トに通水管からの排気を許容する第２逆止弁
を取付けたことを特徴とする管路の吸排気切替え構造。1. An air valve is attached in communication with a water pipe, and a connection port of a switching valve having an intake port and an exhaust port is connected to an intake / exhaust hole of the air valve, and Intake port
A first check valve for allowing intake to the water pipe is attached to the port, and a second check valve for allowing exhaust to the water pipe is attached to the exhaust port. Switching structure.
気孔に吸気ポ−トと排気ポ−トを備えた切替弁の接続ポ
−トを接続するとともに、前記吸気ポ−トに通水管への
吸気を許容する第１逆止弁を取付け、前記排気ポ−トに
通水管からの排気を許容する第２逆止弁を取付けたこと
を特徴とする管路の吸排気切替え構造。2. An intake / exhaust hole is provided in the water passage, a connection port of a switching valve having an intake port and an exhaust port is connected to the intake / exhaust hole, and the intake port is also provided. A first check valve that allows intake to the water pipe is attached to the exhaust pipe, and a second check valve that allows exhaust to the exhaust pipe is attached to the exhaust port. Construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16090792A JP2794514B2 (en) | 1992-06-19 | 1992-06-19 | Pipe intake / exhaust switching structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16090792A JP2794514B2 (en) | 1992-06-19 | 1992-06-19 | Pipe intake / exhaust switching structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH062349A true JPH062349A (en) | 1994-01-11 |
| JP2794514B2 JP2794514B2 (en) | 1998-09-10 |
Family
ID=15724916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16090792A Expired - Fee Related JP2794514B2 (en) | 1992-06-19 | 1992-06-19 | Pipe intake / exhaust switching structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2794514B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100741576B1 (en) * | 2005-12-20 | 2007-07-20 | 조희남 | Apparatus stop up uncutting for mending waterworks and drainage |
| CN105240642A (en) * | 2015-10-17 | 2016-01-13 | 李德生 | Convection odor removal suction and exhaust pipeline equipment |
| CN114413098A (en) * | 2022-02-10 | 2022-04-29 | 西安航空学院 | Inner cylinder type water hammer-proof buffering exhaust valve |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106969882A (en) * | 2017-05-17 | 2017-07-21 | 中车唐山机车车辆有限公司 | Track train airduct adapter and track train |
-
1992
- 1992-06-19 JP JP16090792A patent/JP2794514B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100741576B1 (en) * | 2005-12-20 | 2007-07-20 | 조희남 | Apparatus stop up uncutting for mending waterworks and drainage |
| CN105240642A (en) * | 2015-10-17 | 2016-01-13 | 李德生 | Convection odor removal suction and exhaust pipeline equipment |
| CN114413098A (en) * | 2022-02-10 | 2022-04-29 | 西安航空学院 | Inner cylinder type water hammer-proof buffering exhaust valve |
| CN114413098B (en) * | 2022-02-10 | 2023-09-05 | 西安航空学院 | Inner cylinder type waterproof hammer buffer exhaust valve |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2794514B2 (en) | 1998-09-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |