JPH0914474A - Seat ring for hydraulic check valve - Google Patents

Seat ring for hydraulic check valve

Info

Publication number
JPH0914474A
JPH0914474A JP15892495A JP15892495A JPH0914474A JP H0914474 A JPH0914474 A JP H0914474A JP 15892495 A JP15892495 A JP 15892495A JP 15892495 A JP15892495 A JP 15892495A JP H0914474 A JPH0914474 A JP H0914474A
Authority
JP
Japan
Prior art keywords
seat ring
check valve
rod
plate
guide
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
JP15892495A
Other languages
Japanese (ja)
Inventor
Koji Yamamoto
功治 山本
Hidekazu Sasaki
英一 佐々木
Makoto Tachibana
橘  誠
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 Ltd
Hitachi Building Systems Engineering and Service Co Ltd
Hitachi Building Systems Engineering Co Ltd
Original Assignee
Hitachi Ltd
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 Ltd, Hitachi Building Systems Engineering and Service Co Ltd, Hitachi Building Systems Engineering Co Ltd filed Critical Hitachi Ltd
Priority to JP15892495A priority Critical patent/JPH0914474A/en
Publication of JPH0914474A publication Critical patent/JPH0914474A/en
Pending legal-status Critical Current

Links

Landscapes

  • Check Valves (AREA)
  • Types And Forms Of Lifts (AREA)

Abstract

PURPOSE: To dispense with exchange of a rod after time passage by avoiding generation of stress of a seat ring, a plate, and a rod screw which fastens a guide when a check valve is closed. CONSTITUTION: A check valve 1 in a hydraulic control valve has a rubber seat ring 1a, a plate 1b for fastening the seat ring, a guide 1c, a rod having a screw, and a nut 1d. At least one circular stepped groove is formed on a flat portion of the cylindrical seat ring 1a.

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、油圧制御弁内の逆止弁
に係り、特に、逆止弁に備えたゴムで成形されたシート
リングに関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a check valve in a hydraulic control valve, and more particularly to a rubber-made seat ring provided in the check valve.

【0002】[0002]

【従来の技術】一般に、ゴムで成形されたシートリング
を有する油圧逆止弁は、シートリング,ガイド,プレー
ト,シートリングをガイド,プレートを介して締結する
ねじ部を有したロッドとナットで構成されている。シー
トリングは円柱状であり、平面部に円状の貫通孔を有
し、プレートの平面部に設けられた円状溝に固定され、
ガイドを介してねじ部を有したロッド,ナットで締結さ
れている。
2. Description of the Related Art Generally, a hydraulic check valve having a rubber-molded seat ring is composed of a seat ring, a guide, a plate, a rod having a screw portion for fastening the seat ring through the plate, and a nut. Has been done. The seat ring has a cylindrical shape, has a circular through hole in the flat surface portion, and is fixed in a circular groove provided in the flat surface portion of the plate,
It is fastened with a rod and a nut having a threaded portion via a guide.

【0003】逆止弁はばねを介しシートリングと油圧制
御弁ボディを密着することで作動油の漏油を防止する構
造としていた。
The check valve has a structure in which the seat ring and the hydraulic control valve body are in close contact with each other via a spring to prevent the hydraulic oil from leaking.

【0004】[0004]

【発明が解決しようとする課題】従来技術は、シートリ
ングをプレート,ガイドを介してねじ部を有するロッ
ド,ナットで締結し、ばねの押付力でシートリングを油
圧制御弁ボディと密着させ作動油の漏油を防止する点で
逆止弁の効果はあるが、シートリングを固定しているプ
レート上面に圧力がかかると密着している油圧制御弁ボ
ディとシートリングの面圧が高くなり、シートリングが
圧縮変形し、その反発力がシートリングを固定するプレ
ート,ガイドに作用し、ロッドねじ部に引張り応力が発
生する。逆止弁の開閉動作により、発生応力は繰返し応
力となり、経年時でロッドねじ部疲労破壊信頼度が低下
し、ロッドの交換サイクルが早く、メンテナンス上非経
済的であるという問題点があった。
In the prior art, the seat ring is fastened with a rod and a nut having a threaded portion through a plate and a guide, and the seat ring is brought into close contact with the hydraulic control valve body by the pressing force of the spring. Although the check valve is effective in preventing oil leakage of the seat ring, when pressure is applied to the upper surface of the plate that secures the seat ring, the surface pressure of the hydraulic control valve body and seat ring that are in close contact increases and The ring is compressed and deformed, and the repulsive force acts on the plate and the guide that fix the seat ring, and tensile stress is generated in the rod screw portion. Due to the opening / closing operation of the check valve, the generated stress becomes a repetitive stress, the fatigue fracture reliability of the rod screw portion deteriorates over time, the rod replacement cycle is fast, and it is uneconomical for maintenance.

【0005】本発明の目的は、ゴムで成形されたシート
リングを有する油圧制御弁内逆止弁で、シートリングを
固定しているプレート上面に圧力がかかった場合、ロッ
ドねじ部の発生応力をなくすことで、経年時ロッドの交
換を不要とし、メンテナンス性の高い油圧制御弁内逆止
弁を提供することにある。
An object of the present invention is to provide a check valve in a hydraulic control valve having a seat ring made of rubber, and when pressure is applied to the upper surface of a plate fixing the seat ring, the stress generated in the rod screw portion is reduced. By eliminating the need to replace the rod over time, it is possible to provide a check valve in the hydraulic control valve with high maintainability.

【0006】[0006]

【課題を解決するための手段】前述の目的を達成するた
め、本発明はゴムで成形されたシートリングをガイド,
プレートを介しねじ部を有したロッド,ナットで締結し
た逆止弁で、円柱状のシートリングの平面部に少なくと
も一つの円状段付き溝を設ける。
SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention relates to a rubber-made seat ring,
A check valve fastened with a rod and a nut having a threaded portion through a plate, and at least one circular stepped groove is provided in the flat portion of a cylindrical seat ring.

【0007】[0007]

【作用】逆止弁は上述のように構成されたため、シート
リングを固定するプレート上面に圧力がかかった場合
で、ロッドねじ部に引張り応力は発生せず、経年時でロ
ッドの交換は不要となる。
Since the check valve is configured as described above, when pressure is applied to the upper surface of the plate that fixes the seat ring, tensile stress does not occur in the rod screw part, and it is not necessary to replace the rod over time. Become.

【0008】[0008]

【実施例】以下、本発明の一実施例を図1,図2を用い
て説明する。
An embodiment of the present invention will be described below with reference to FIGS.

【0009】油圧制御弁内逆止弁1は、ゴムで成形され
たシートリング1aをプレート1b,ガイド1cを介し
てつば部,ねじ部を有したロッド1eとナット1dによ
り締結し構成されている。ばね4の押付力によりシート
リング1aが油圧制御弁ボディ2に密着することで逆止
弁1は閉状態となる。ポンプ・タンクポート6がクラッ
キング圧力に加圧された時、逆止弁1がOリング3を介
して摺動し、逆止弁1が開弁動作をする。上述のように
逆止弁1が開閉弁動作時、シートリング1aに段付き部
1a1を設けることでロッド1eねじ部の応力発生を防
止することができる。これについて図3,図4を交えて
説明する。
The check valve 1 in the hydraulic control valve is constructed by fastening a seat ring 1a made of rubber through a plate 1b and a guide 1c by a rod 1e having a collar portion and a screw portion and a nut 1d. . The seat ring 1a is brought into close contact with the hydraulic control valve body 2 by the pressing force of the spring 4, so that the check valve 1 is closed. When the pump / tank port 6 is pressurized to the cracking pressure, the check valve 1 slides through the O-ring 3, and the check valve 1 opens. As described above, when the check valve 1 is operated to open and close, by providing the stepped portion 1a1 on the seat ring 1a, it is possible to prevent stress from occurring in the threaded portion of the rod 1e. This will be described with reference to FIGS.

【0010】今、乗りかご8,ジャッキ9,制御弁1
0,モータ11,ポンプ12,タンク15からなる油圧
式エレベータの乗りかご8が停止している。ジャッキ圧
7はプレート1b上面にかかり、シートリング1aの制
御弁ボディ2と密着している部分は面圧が高くなり、シ
ートリング1aは1a3のように歪む。この時、シート
リング1aに段付き溝1a1を設けたため、ガイド1c
との接触面圧は0kg/cm2 であり、ナット1d締付応力
時からのロッドねじ部1e1の応力増加はない。
Now, the car 8, the jack 9, the control valve 1
0, the motor 11, the pump 12, and the car 15 of the hydraulic elevator, which is composed of the tank 15, are stopped. The jack pressure 7 is applied to the upper surface of the plate 1b, and the surface pressure of the portion of the seat ring 1a that is in close contact with the control valve body 2 increases, and the seat ring 1a is distorted like 1a3. At this time, since the seat ring 1a is provided with the stepped groove 1a1, the guide 1c
The contact surface pressure with and is 0 kg / cm 2 , and there is no increase in the stress of the rod thread portion 1e1 from the time when the nut 1d is tightened.

【0011】乗りかご8上昇時は、上昇流量制御弁13
が閉じ、ポンプポート6の圧力がクラッキング圧力に達
すると逆止弁1は開く。この時、シートリング1aは逆
止弁1の閉弁時状態1a3から1aに復元し、ガイド1
cとの接触面圧は0kg/cm2であり、ロッドねじ部1e
の逆止弁1閉状態からの応力増加はない。
When the car 8 is elevated, the ascending flow rate control valve 13
Is closed and the check valve 1 opens when the pressure at the pump port 6 reaches the cracking pressure. At this time, the seat ring 1a is restored from the closed state 1a3 of the check valve 1 to the 1a, and the guide 1
The contact surface pressure with c is 0 kg / cm 2 and the rod screw part 1e
There is no increase in stress from the check valve 1 closed state.

【0012】逆止弁1の開閉動作時、ロッドねじ部1e
1の応力振幅は0kg/mm2 であり、本発明のシートリン
グ1aのように段付形状1a1を設けることで、シート
リング1aの締結体ロッド1eは疲労破壊することな
く、経年時におけるロッド1eの交換は不要となる。
When the check valve 1 is opened and closed, the rod screw portion 1e
The stress amplitude of No. 1 is 0 kg / mm 2 , and by providing the stepped shape 1a1 like the seat ring 1a of the present invention, the fastening body rod 1e of the seat ring 1a does not undergo fatigue fracture and the rod 1e at the time of aging. No replacement is required.

【0013】[0013]

【発明の効果】本発明によれば、ゴムで成形された円柱
状のシートリングの平面部に少なくとも一つの円状段付
き溝を設けたことで、逆止弁開閉動作時ロッドねじ部に
繰返し応力が発生せず、経年時ロッドの交換が不要とな
る。
According to the present invention, at least one circular stepped groove is provided in the flat surface portion of the cylindrical seat ring formed of rubber, so that the rod screw portion is repeatedly used when the check valve is opened and closed. No stress is generated and it is not necessary to replace the rod over time.

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

【図1】油圧制御弁内逆止弁の説明図。FIG. 1 is an explanatory diagram of a check valve in a hydraulic control valve.

【図2】本発明による、段付き溝を有したシートリング
の平面図。
FIG. 2 is a plan view of a seat ring having a stepped groove according to the present invention.

【図3】油圧エレベータの油圧回路図。FIG. 3 is a hydraulic circuit diagram of a hydraulic elevator.

【図4】ジャッキ圧負荷時の本発明シートリングの変形
の説明図。
FIG. 4 is an explanatory view of deformation of the seat ring of the present invention when a jack pressure is applied.

【符号の説明】[Explanation of symbols]

1…油圧制御弁内逆止弁、1a…シートリング、1b…
プレート、1c…ガイド、1d…ナット、1e…ロッ
ド、2…油圧制御弁ボディ、3…Oリング、4…ばね、
5…ジャッキポート、6…ポンプ・タンクポート。
1 ... Check valve in hydraulic control valve 1a ... Seat ring, 1b ...
Plate, 1c ... Guide, 1d ... Nut, 1e ... Rod, 2 ... Hydraulic control valve body, 3 ... O-ring, 4 ... Spring,
5 ... jack port, 6 ... pump / tank port.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 橘 誠 茨城県ひたちなか市市毛1070番地 株式会 社日立製作所水戸工場内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Makoto Tachibana 1070 Ichige, Hitachinaka City, Ibaraki Prefecture Hitachi Ltd. Mito Plant

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】ゴムで成形されたシートリング,上記シー
トリングを締結するプレート,ガイド,ねじ部を有した
ロッド,ナットを備えた油圧制御弁内逆止弁において、
上記円柱状のシートリングの平面部に少なくとも一つの
円状段付き溝を設けたことを特徴とする油圧逆止弁のシ
ートリング。
1. A check valve in a hydraulic control valve, comprising a seat ring formed of rubber, a plate for fastening the seat ring, a guide, a rod having a screw portion, and a nut,
A seat ring for a hydraulic check valve, characterized in that at least one circular stepped groove is provided in a flat surface portion of the cylindrical seat ring.
【請求項2】ゴムで成形されたシートリング,上記シー
トリングを締結するプレート,ガイド,ねじ部を有した
ロッド,ナットを備えた油圧制御弁内逆止弁において、
上記円柱状のシートリングの平面部に少なくとも一つの
円状傾斜切欠き溝を設けたことを特徴とする油圧逆止弁
のシートリング。
2. A check valve in a hydraulic control valve, comprising a seat ring formed of rubber, a plate for fastening the seat ring, a guide, a rod having a screw portion, and a nut,
A seat ring for a hydraulic check valve, characterized in that at least one circular inclined notch groove is provided in a plane portion of the cylindrical seat ring.
JP15892495A 1995-06-26 1995-06-26 Seat ring for hydraulic check valve Pending JPH0914474A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15892495A JPH0914474A (en) 1995-06-26 1995-06-26 Seat ring for hydraulic check valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15892495A JPH0914474A (en) 1995-06-26 1995-06-26 Seat ring for hydraulic check valve

Publications (1)

Publication Number Publication Date
JPH0914474A true JPH0914474A (en) 1997-01-14

Family

ID=15682320

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15892495A Pending JPH0914474A (en) 1995-06-26 1995-06-26 Seat ring for hydraulic check valve

Country Status (1)

Country Link
JP (1) JPH0914474A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021183816A (en) * 2020-05-21 2021-12-02 株式会社川本製作所 Feed water supply system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021183816A (en) * 2020-05-21 2021-12-02 株式会社川本製作所 Feed water supply system

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