JPH058970A - Hydraulic circuit for hydraulic elevator - Google Patents

Hydraulic circuit for hydraulic elevator

Info

Publication number
JPH058970A
JPH058970A JP18702491A JP18702491A JPH058970A JP H058970 A JPH058970 A JP H058970A JP 18702491 A JP18702491 A JP 18702491A JP 18702491 A JP18702491 A JP 18702491A JP H058970 A JPH058970 A JP H058970A
Authority
JP
Japan
Prior art keywords
hydraulic
valve
piping system
valves
stop
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
Application number
JP18702491A
Other languages
Japanese (ja)
Inventor
Masashige Murayama
正重 村山
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Building Systems Engineering and Service Co Ltd
Hitachi Building Systems Engineering Co Ltd
Original Assignee
Hitachi Building Systems Engineering and Service Co Ltd
Hitachi Building Systems Engineering Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Building Systems Engineering and Service Co Ltd, Hitachi Building Systems Engineering Co Ltd filed Critical Hitachi Building Systems Engineering and Service Co Ltd
Priority to JP18702491A priority Critical patent/JPH058970A/en
Publication of JPH058970A publication Critical patent/JPH058970A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To discriminate an inner leakage position correctly and quickly by providing fever stop valves than piping systems. CONSTITUTION:In the stop condition of a cage 3, stop valves 12,21 and a sluice valve 42 are fully closed, a prescribed time is kept in this condition, and whether pressure drop is generated or not is confirmed with a pressure gauge 41. At this time, if pressure drop is not generated, it is confirmed that there is no inner leakage in the valves and the like in an emergency descent piping system 30 in which the stop valves 12,21 are not interposed between. Next, the stop valve 12 is opened, and after a prescribed time, whether pressure drop is generated or not is confirmed with the pressure gauge 41. At this time, if pressure drop is not generated, it is confirmed that there is no inner leakage in the valves and the like in a descent piping system 20. Further, at closing the stop valve 12 and opening the stop valve 21, it can be similarly discriminated whether inner leakage is generated or not in the valves and the like in a pressure oil feed piping system 10. Hereby, an inner leakage position can be discriminated correctly and quickly.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、油圧エレベータの油圧
回路に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic circuit for a hydraulic elevator.

【0002】[0002]

【従来の技術】この種の装置としては、たとえば実開昭
63−16742号公報に記載されているように、油圧
エレベータにおける油圧ジャッキのシリンダと油タンク
との間にモータ、油圧ポンプおよびこの吐出側に接続さ
れた逆止弁を含む圧油供給配管系統、シリンダからの圧
油を制限しつつ油タンクに戻してエレベータかごの下降
を制御する下降制御配管系統および非常時や点検時にシ
リンダ内の圧油を戻すための非常下降配管系統を設置し
たものが知られている。
2. Description of the Related Art As an apparatus of this type, as disclosed in, for example, Japanese Utility Model Laid-Open No. 63-16742, a motor, a hydraulic pump and the discharge between a cylinder of a hydraulic jack and an oil tank in a hydraulic elevator are provided. Of the pressure oil supply piping system including a check valve connected to the side of the cylinder, the descending control piping system that controls the descending of the elevator car by returning it to the oil tank while limiting the pressure oil from the cylinder, and the cylinder inside the cylinder during an emergency or inspection. It is known that an emergency descending piping system for returning pressure oil is installed.

【0003】[0003]

【発明が解決しようとする課題】上記従来のものにおい
ては、シリンダと油タンクとの間に3系統の配管が並列
的に設置され、しかもこれらの各配管系統には複数個の
逆止弁等が配置されているため、内部洩れが発生した場
合、分解せずに内部洩れを起しているのは何れの箇所で
あるかを判別することはできなかった。
In the above-mentioned prior art, three lines of piping are installed in parallel between the cylinder and the oil tank, and a plurality of check valves etc. are provided in each of these piping systems. When the internal leak occurs, it was not possible to determine which part is causing the internal leak without disassembling the internal leak.

【0004】本発明の目的は、配管系統を分解すること
なく簡便に内部洩れを起している箇所を判別することが
できる油圧エレベータの油圧回路を提供することにあ
る。
An object of the present invention is to provide a hydraulic circuit of a hydraulic elevator which can easily determine a location where internal leakage has occurred without disassembling a piping system.

【0005】[0005]

【課題を解決するための手段】本発明は上記目的を達成
するために、油タンク、油圧ポンプ、モータ、非常下降
弁、逆止弁および絞り弁を備え、油圧エレベータの油圧
ジャッキシリンダと前記油タンクとの間を非常時等にシ
リンダ内の圧油を油タンクに戻すための配管系統、前記
油圧ポンプから吐出した圧油をシリンダ内に送り込むた
めの配管系統およびシリンダ内からの圧油を制限しなが
ら油タンクに戻す配管系統によって連絡されている油圧
エレベータの油圧回路において、前記油タンクとシリン
ダとを連結している前記複数の配管系統における何れか
1系統を除いた残りの各配管系統に止弁をそれぞれ設け
たものである。
In order to achieve the above object, the present invention comprises an oil tank, a hydraulic pump, a motor, an emergency lowering valve, a check valve and a throttle valve, and a hydraulic jack cylinder of a hydraulic elevator and the oil. A piping system for returning the pressure oil in the cylinder to the oil tank in an emergency between the tank and the tank, a piping system for sending the pressure oil discharged from the hydraulic pump into the cylinder, and the pressure oil from the cylinder While in the hydraulic circuit of the hydraulic elevator which is connected by the piping system for returning to the oil tank, the remaining piping systems except one of the plurality of piping systems connecting the oil tank and the cylinder Each has a stop valve.

【0006】[0006]

【作用】上記の構成であるから、各配管系統に設置した
止弁を閉じた後、シリンダ近くに設置されている仕切り
弁を閉じる。これによって各配管系統内における仕切り
弁と各止弁との間には高い(油タンク内より)圧力の油
が閉じ込められた状態となる。この時止弁が設置されて
いない系統内に内部洩れがある場合には、仕切り弁と各
止弁間の領域の油圧が低下していくので、止弁が設置さ
れていない系統内の弁に内部洩れを生じていることを判
別できる。他の系統については、内部洩れの有無を判別
しようとする弁等が介在されている系統の止弁だけを開
き、前記領内の油圧の降下の有無を確認すれば当該系統
内の弁等が内部洩れを起しているか否かを判別すること
ができる。
With the above construction, the stop valves installed in each piping system are closed, and then the sluice valves installed near the cylinders are closed. As a result, a high pressure (from within the oil tank) oil is trapped between the sluice valve and each stop valve in each piping system. At this time, if there is internal leakage in the system where the stop valve is not installed, the oil pressure in the area between the sluice valve and each stop valve will decrease. It can be determined that internal leakage has occurred. For other systems, open only the stop valve of the system in which the valve that tries to determine whether there is internal leakage is intervening, and check the presence or absence of hydraulic pressure drop in the above area It is possible to determine whether or not there is a leak.

【0007】[0007]

【実施例】以下に本発明の一実施例を図1により説明す
る。
DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG.

【0008】図1は、油圧エレベータの油圧回路1と油
圧ジャッキ2およびかご3の部分を示したものである。
油タンク4の油をシリンダ2a内に送り込みプランジャ
2bを上昇させる圧油供給配管系統10とプランジャ2
bを所定の速度で下降させるための下降配管系統20
と、非常時または点検時等にシリンダ2a内の油をタン
ク4に直接戻してプランジャ2bを下降させる非常下降
配管系統30を備えている。
FIG. 1 shows a hydraulic circuit 1, a hydraulic jack 2 and a car 3 of a hydraulic elevator.
The oil in the oil tank 4 is sent into the cylinder 2a and the plunger 2b is lifted up.
descending piping system 20 for descending b at a predetermined speed
An emergency descending piping system 30 for directly returning the oil in the cylinder 2a to the tank 4 and lowering the plunger 2b in an emergency or inspection is provided.

【0009】圧油供給配管系統10は油圧ポンプ11、
止弁12、および逆止め弁13を備え、これらが互いに
直列に接続されている。下降配管系統20は止弁21、
逆止弁部22aおよび絞り弁部22bを有する下降制御
弁22を備えている。また下降制御弁22はパイロット
ポート22c、22dを有し、一方のポート22cは電
磁切替え弁23を介してシリンダ2aに接続された共通
配管40に接続されている。
The pressure oil supply piping system 10 is a hydraulic pump 11,
A stop valve 12 and a check valve 13 are provided, and these are connected in series with each other. The descending piping system 20 has a stop valve 21,
The lowering control valve 22 having a check valve portion 22a and a throttle valve portion 22b is provided. The lowering control valve 22 has pilot ports 22c and 22d, and one port 22c is connected to a common pipe 40 connected to the cylinder 2a via an electromagnetic switching valve 23.

【0010】他のポート22dは、共通配管40または
これに連結されている下降配管系統20に接続されてい
る。そしてパイロットポート22cに加わるパイロット
圧が有の場合逆止弁部22a側に、無しの場合は、絞り
弁部22bに切替わる。
The other port 22d is connected to the common pipe 40 or the descending pipe system 20 connected to the common pipe 40. When there is a pilot pressure applied to the pilot port 22c, it is switched to the check valve portion 22a side, and when it is not, it is switched to the throttle valve portion 22b.

【0011】非常下降系統30は、非常下降弁31を備
えている。共通配管40には圧力計41が取付けられ、
また途中には仕切り弁42が介在されている。尚図1に
はプランジャ2bの上昇または下降速度を設定し、ある
いは調節するための機器は省略した。
The emergency lowering system 30 includes an emergency lowering valve 31. A pressure gauge 41 is attached to the common pipe 40,
Further, a sluice valve 42 is interposed in the middle. In FIG. 1, a device for setting or adjusting the ascending or descending speed of the plunger 2b is omitted.

【0012】次に動作説明をする。通常運転中は仕切り
弁42、止弁12および止弁21が、ともに全開となっ
ている。
Next, the operation will be described. During normal operation, the sluice valve 42, the stop valve 12 and the stop valve 21 are all fully open.

【0013】かご3を上昇させようとする場合には、電
磁切替え弁23がポジションA(図示の状態)にあり、
パイロットポート22cにパイロット圧が有の状態とな
るので、下降制御弁22は逆止弁部22aが主回路に接
続された状態となる。この状態で油圧ポンプから吐出さ
れた圧油が、逆止弁13を押し開いてシリンダ2aに流
れ込み、プランジャ2bを押し上げかご3を上昇させ
る。かご3を停止させようとする場合には、油圧ポンプ
11の圧油を油タンク4内に戻す回路(図示省略)中の
弁が開き、その後油圧ポンプ11を停止させる。これに
よって圧油の供給がなくなり、かご3の上昇が止まる。
When the car 3 is to be raised, the electromagnetic switching valve 23 is in the position A (state shown),
Since the pilot pressure is present in the pilot port 22c, the lowering control valve 22 has the check valve portion 22a connected to the main circuit. In this state, the pressure oil discharged from the hydraulic pump pushes the check valve 13 open and flows into the cylinder 2a, pushing up the plunger 2b and raising the car 3. When the car 3 is to be stopped, a valve in a circuit (not shown) for returning the pressure oil of the hydraulic pump 11 into the oil tank 4 is opened, and then the hydraulic pump 11 is stopped. As a result, the pressure oil is no longer supplied and the car 3 stops rising.

【0014】かご3を下降させようとする場合には、油
圧ポンプが停止している状態のもとで、電磁切替え弁2
3がポジョンBに切替えられる。これによって下降制御
弁22のパイロットポート22cのパイロット圧が無し
の状態となり、下降電磁弁22は絞り弁部22bに切替
わり、シリンダ2a内の油が絞り弁部22bによってそ
の流量が制限されながら油タンク4に戻され、これによ
ってかご3が下降する。
When the car 3 is to be lowered, the electromagnetic switching valve 2 is operated while the hydraulic pump is stopped.
3 is switched to Pojeon B. As a result, the pilot pressure in the pilot port 22c of the lowering control valve 22 is turned off, the lowering solenoid valve 22 is switched to the throttle valve portion 22b, and the oil in the cylinder 2a is regulated in flow rate by the throttle valve portion 22b. It is returned to the tank 4, and the car 3 is lowered by this.

【0015】次に各配管系統10、20、30内に介在
されている各弁の内部洩れの有無を判定する際の要領を
説明する。まず、かご3が停止している状態(油圧ポン
プ停止)において、止弁12および止弁21を全閉し、
次に仕切り弁42を全閉する。この状態を所定時間維持
して圧力計41によって圧力降下がないかどうか確認す
る。この時圧力効果がなければ止弁が介在されていない
非常下降配管系統30内の弁等には内部洩れがないこと
になる。
Next, an explanation will be given of the procedure for determining the presence / absence of internal leakage of each valve interposed in each piping system 10, 20, 30. First, in the state where the car 3 is stopped (the hydraulic pump is stopped), the stop valve 12 and the stop valve 21 are fully closed,
Next, the gate valve 42 is fully closed. This state is maintained for a predetermined time and the pressure gauge 41 confirms whether or not there is a pressure drop. At this time, if there is no pressure effect, it means that there is no internal leakage in the valves and the like in the emergency descending piping system 30 in which the stop valve is not interposed.

【0016】次に止弁12を開き所定時間後に圧力計4
1によって圧力降下がないかどうか確認する。この時、
圧力降下がなければ、下降配管系統20内の弁等には内
部洩れがないことになる。
Next, the stop valve 12 is opened, and after a predetermined time, the pressure gauge 4
Check if there is no pressure drop by 1. At this time,
If there is no pressure drop, there will be no internal leakage in the valves and the like in the descent piping system 20.

【0017】止弁12を閉じ、止弁21を開けば、同様
に圧油供給配管系統10内の弁等の内部洩れの有無を判
別することができる。
If the stop valve 12 is closed and the stop valve 21 is opened, the presence or absence of internal leakage of the valve or the like in the pressure oil supply piping system 10 can be similarly determined.

【0018】以上のように本事例に依れば、配管系統よ
りも少ない止弁を設置することによって内部洩れ箇所を
的確、且つ迅速に判別することができる。
As described above, according to this example, by installing fewer stop valves than the piping system, it is possible to accurately and promptly determine the internal leakage location.

【0019】[0019]

【発明の効果】以上述べたように本発明に依れば、分解
することなく、しかも簡便に油圧エレベータの油圧回路
における内部洩れ箇所を判別することができる。
As described above, according to the present invention, it is possible to easily determine the internal leakage location in the hydraulic circuit of the hydraulic elevator without disassembling.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の一実施例を示す油圧回路図である。FIG. 1 is a hydraulic circuit diagram showing an embodiment of the present invention.

【符号の説明】[Explanation of symbols]

1 油圧回路 2 油圧ジャッキ 2a シリンダ 3 かご 10 圧油供給配管系統 12 止弁 20 下降配管系統 21 止弁 30 非常下降配管系統 40 共通配管 1 hydraulic circuit 2 hydraulic jack 2a cylinder 3 basket 10 pressure oil supply piping system 12 stop valve 20 descending piping system 21 stop valve 30 emergency descending piping system 40 common piping

Claims (1)

【特許請求の範囲】 【請求項1】 油タンク、油圧ポンプ、モータ、非常下
降弁、逆止弁および絞り弁を備え、油圧エレベータの油
圧ジャッキシリンダと前記油タンクとの間を非常時等に
シリンダ内の圧油を油タンクに戻すための配管系統、前
記油圧ポンプから吐出した圧油をシリンダ内に送り込む
ための配管系統およびシリンダ内からの圧油を制限しな
がら油タンクに戻す配管系統によって連絡されている油
圧エレベータの油圧回路において、前記油タンクとシリ
ンダとを連結している前記複数の配管系統における何れ
か1系統を除いた残りの各配管系統に止弁をそれぞれ設
けたことを特徴とする油圧エレベータの油圧回路。
Claim: What is claimed is: 1. An oil tank, a hydraulic pump, a motor, an emergency lowering valve, a check valve and a throttle valve, which are provided between the hydraulic jack cylinder of the hydraulic elevator and the oil tank in an emergency or the like. By the piping system for returning the pressure oil in the cylinder to the oil tank, the piping system for sending the pressure oil discharged from the hydraulic pump into the cylinder, and the piping system for returning the pressure oil from the cylinder to the oil tank In the hydraulic circuit of the hydraulic elevator connected, stop valves are respectively provided in the remaining pipe systems except one of the plurality of pipe systems connecting the oil tank and the cylinder. The hydraulic circuit of the hydraulic elevator.
JP18702491A 1991-07-02 1991-07-02 Hydraulic circuit for hydraulic elevator Pending JPH058970A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18702491A JPH058970A (en) 1991-07-02 1991-07-02 Hydraulic circuit for hydraulic elevator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18702491A JPH058970A (en) 1991-07-02 1991-07-02 Hydraulic circuit for hydraulic elevator

Publications (1)

Publication Number Publication Date
JPH058970A true JPH058970A (en) 1993-01-19

Family

ID=16198864

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18702491A Pending JPH058970A (en) 1991-07-02 1991-07-02 Hydraulic circuit for hydraulic elevator

Country Status (1)

Country Link
JP (1) JPH058970A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004001969A (en) * 2002-05-31 2004-01-08 Toshiba Elevator Co Ltd Hydraulic elevator
CN103360337A (en) * 2013-07-11 2013-10-23 浙江海蓝化工有限公司 Preparation method of 2-sulfydryl-5-methyl-1, 3, 4-thiadiazole

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004001969A (en) * 2002-05-31 2004-01-08 Toshiba Elevator Co Ltd Hydraulic elevator
CN103360337A (en) * 2013-07-11 2013-10-23 浙江海蓝化工有限公司 Preparation method of 2-sulfydryl-5-methyl-1, 3, 4-thiadiazole

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