孔(Kong)板(Ban)流(Liu)量(Liang)计(Ji)空(Kong)跳(Tiao)现(Xian)象(Xiang)及(Ji)解(Jie)决(Jue)方(Fang)法(Fa)

差(Cha)压(Ya)式(Shi)孔(Kong)板(Ban)流(Liu)量(Liang)计(Ji)容(Rong)易(Yi)出(Chu)现(Xian)的(De)问(Wen)题(Ti)及(Ji)解(Jie)决(Jue)方(Fang)法(Fa)

     本(Ben)文(Wen)主(Zhu)要(Yao)针(Zhen)对(Dui)差(Cha)压(Ya)式(Shi)（(?)孔(Kong)板(Ban)）(?)流(Liu)量(Liang)计(Ji)的(De) “(?)空(Kong)跳(Tiao) "现(Xian)象(Xiang)以(Yi)及(Ji)采(Cai)用(Yong)差(Cha)压(Ya)式(Shi)流(Liu)量(Liang)仪(Yi)表(Biao)计(Ji)量(Liang)时(Shi)的(De)一(Yi)些(Xie)不(Bu)正(Zheng)常(Chang)现(Xian)象(Xiang)监(Jian)管(Guan)方(Fang)法(Fa)及(Ji)防(Fang)止(Zhi)对(Dui)策(Ce)。(?)

     差(Cha)压(Ya)式(Shi)（(?)孔(Kong)板(Ban)）(?)流(Liu)量(Liang)计(Ji)因(Yin)其(Qi)设(She)计(Ji)规(Gui)范(Fan)，(?)简(Jian)单(Dan)牢(Lao)固(Gu)，(?)一(Yi)致(Zhi)性(Xing)好(Hao)，(?)不(Bu)需(Xu)实(Shi)流(Liu)标(Biao)定(Ding)诸(Zhu)多(Duo)优(You)点(Dian)被(Bei)广(Guang)泛(Fan)应(Ying)用(Yong)于(Yu)贸(Mao)易(Yi)结(Jie)算(Suan)，(?)但(Dan)在(Zai)实(Shi)际(Ji)使(Shi)用(Yong)过(Guo)程(Cheng)中(Zhong)，(?)经(Jing)常(Chang)会(Hui)出(Chu)现(Xian)一(Yi)此(Ci)问(Wen)题(Ti)，(?)比(Bi)如(Ru)“(?)空(Kong)跳(Tiao) "、(?)多(Duo)计(Ji)、(?)少(Shao)计(Ji)及(Ji)导(Dao)压(Ya)管(Guan)高(Gao)度(Du)修(Xiu)正(Zheng)等(Deng)问(Wen)题(Ti)，(?)使(Shi)供(Gong)、(?)用(Yong)双(Shuang)方(Fang)蒙(Meng)受(Shou)不(Bu)必(Bi)要(Yao)的(De)损(Sun)失(Shi)，(?)下(Xia)面(Mian)就(Jiu)对(Dui)产(Chan)生(Sheng)这(Zhe)些(Xie)问(Wen)题(Ti)的(De)原(Yuan)因(Yin)进(Jin)行(Xing)实(Shi)例(Li)分(Fen)析(Xi)并(Bing)提(Ti)出(Chu)解(Jie)决(Jue)办(Ban)法(Fa)。(?)

    一(Yi)、(?)差(Cha)压(Ya)式(Shi)流(Liu)量(Liang)计(Ji)是(Shi)以(Yi)伯(Bo)努(Nu)利(Li)方(Fang)程(Cheng)和(He)流(Liu)动(Dong)连(Lian)续(Xu)性(Xing)方(Fang)程(Cheng)为(Wei)依(Yi)据(Ju)，(?)当(Dang)流(Liu)体(Ti)流(Liu)经(Jing)节(Jie)流(Liu)件(Jian)（(?)或(Huo)传(Chuan)感(Gan)器(Qi)）(?)时(Shi)，(?)在(Zai)其(Qi)两(Liang)侧(Ce)产(Chan)生(Sheng)差(Cha)压(Ya)，(?)而(?)这(Zhe)一(Yi)差(Cha)压(Ya)与(Yu)流(Liu)量(Liang)的(De)平(Ping)方(Fang)成(Cheng)正(Zheng)比(Bi)。(?)将(Jiang)差(Cha)压(Ya)变(Bian)送(Song)器(Qi)与(Yu)流(Liu)量(Liang)显(Xian)示(Shi)仪(Yi)表(Biao)配(Pei)合(He)起(Qi)来(Lai)检(Jian)查(Cha)零(Ling)位(Wei)输(Shu)出(Chu)，(?)如(Ru)果(Guo)零(Ling)位(Wei)存(Cun)在(Zai)偏(Pian)差(Cha)，(?)则(Ze)可(Ke)能(Neng)的(De)原(Yuan)因(Yin)如(Ru)下(Xia)。(?)

   （(?)一(Yi)）(?)差(Cha)压(Ya)变(Bian)送(Song)器(Qi)静(Jing)压(Ya)误(Wu)差(Cha)。(?)

   根(Gen)据(Ju) JJG640-1994差(Cha)压(Ya)式(Shi)流(Liu)量(Liang)计(Ji)检(Jian)定(Ding)规(Gui)程(Cheng)规(Gui)定(Ding)：(?)单(Dan)向(Xiang)静(Jing)压(Ya)试(Shi)验(Yan)：(?)在(Zai)正(Zheng)压(Ya)室(Shi)加(Jia)入(Ru)公(Gong)称(Cheng)压(Ya)力(Li)，(?)保(Bao)持(Chi) 5min后(Hou)撤(Che)压(Ya)，(?)待(Dai) 10min后(Hou)，(?)测(Ce)量(Liang)基(Ji)本(Ben)误(Wu)差(Cha)和(He)回(Hui)程(Cheng)误(Wu)差(Cha)，(?)然(Ran)后(Hou)用(Yong)同(Tong)样(Yang)方(Fang)法(Fa)对(Dui)负(Fu)压(Ya)进(Jin)行(Xing)同(Tong)样(Yang)试(Shi)验(Yan)；(?)双(Shuang)向(Xiang)静(Jing)压(Ya)试(Shi)验(Yan)：(?)在(Zai)正(Zheng)、(?)负(Fu)压(Ya)室(Shi)同(Tong)时(Shi)加(Jia) 25%的(De)公(Gong)称(Cheng)压(Ya)力(Li)，(?)待(Dai)稳(Wen)定(Ding)后(Hou)测(Ce)量(Liang)输(Shu)出(Chu)下(Xia)限(Xian)值(Zhi)的(De)变(Bian)化(Hua)量(Liang)，(?)然(Ran)后(Hou)将(Jiang)压(Ya)力(Li)上(Shang)升(Sheng)到(Dao)公(Gong)称(Cheng)压(Ya)力(Li)作(Zuo)同(Tong)样(Yang)的(De)试(Shi)验(Yan)。(?)在(Zai)实(Shi)际(Ji)工(Gong)作(Zuo)中(Zhong)，(?)经(Jing)常(Chang)采(Cai)用(Yong)加(Jia)工(Gong)作(Zuo)静(Jing)压(Ya)，(?)这(Zhe)种(Zhong)方(Fang)法(Fa)在(Zai)产(Chan)品(Pin)经(Jing)常(Chang)推(Tui)荐(Jian)采(Cai)用(Yong)。(?)具(Ju)体(Ti)操(Cao)作(Zuo)方(Fang)法(Fa)是(Shi)：(?)在(Zai)检(Jian)定(Ding)完(Wan)毕(Bi)后(Hou)，(?)先(Xian)开(Kai)平(Ping)衡(Heng)阀(Fa)，(?)再(Zai)开(Kai)正(Zheng)压(Ya)阀(Fa)，(?)送(Song)正(Zheng)负(Fu)压(Ya)室(Shi)工(Gong)作(Zuo)压(Ya)力(Li)，(?)通(Tong)过(Guo)调(Diao)整(Zheng)零(Ling)点(Dian)克(Ke)服(Fu)静(Jing)压(Ya)影(Ying)响(Xiang)。(?)

    例(Li)：(?)某(Mou)蒸(Zheng)汽(Qi)用(Yong)户(Hu)，(?)现(Xian)场(Chang)安(An)装(Zhuang)条(Tiao)件(Jian)符(Fu)合(He)要(Yao)求(Qiu)，(?)但(Dan)是(Shi)其(Qi)总(Zong)阀(Fa)门(Men)在(Zai)节(Jie)流(Liu)装(Zhuang)置(Zhi)以(Yi)前(Qian)。(?)在(Zai)差(Cha)压(Ya)变(Bian)送(Song)器(Qi)检(Jian)定(Ding)完(Wan)毕(Bi)后(Hou)，(?)先(Xian)开(Kai)平(Ping)衡(Heng)阀(Fa)，(?)再(Zai)开(Kai)正(Zheng)压(Ya)阀(Fa)，(?)送(Song)正(Zheng)负(Fu)压(Ya)室(Shi) 0.65MPa工(Gong)作(Zuo)压(Ya)力(Li)，(?)此(Ci)时(Shi)差(Cha)压(Ya)变(Bian)送(Song)器(Qi)零(Ling)点(Dian)为(Wei) 3.915mA，(?)调(Diao)差(Cha)压(Ya)变(Bian)送(Song)器(Qi)零(Ling)点(Dian)上(Shang)移(Yi)至(Zhi)检(Jian)定(Ding)时(Shi)数(Shu)值(Zhi)为(Wei) 3.960mA，(?)完(Wan)毕(Bi)后(Hou)，(?)将(Jiang)差(Cha)压(Ya)变(Bian)送(Song)器(Qi)投(Tou)入(Ru)运(Yun)行(Xing)。(?)当(Dang)用(Yong)户(Hu)停(Ting)汽(Qi)一(Yi)段(Duan)时(Shi)间(Jian)后(Hou)，(?)流(Liu)量(Liang)积(Ji)算(Suan)仪(Yi)走(Zou)字(Zi)。(?)

   其(Qi)解(Jie)决(Jue)方(Fang)法(Fa)有(You)以(Yi)下(Xia)几(Ji)种(Zhong)：(?) 

   1.条(Tiao)件(Jian)具(Ju)备(Bei)者(Zhe)尽(Jin)可(Ke)能(Neng)采(Cai)用(Yong)规(Gui)程(Cheng)上(Shang)规(Gui)定(Ding)的(De)静(Jing)压(Ya)值(Zhi)进(Jin)行(Xing)静(Jing)压(Ya)试(Shi)验(Yan)。(?) 

   2.不(Bu)方(Fang)便(Bian)时(Shi)加(Jia)工(Gong)作(Zuo)静(Jing)压(Ya)也(Ye)未(Wei)尝(Chang)不(Bu)可(Ke)，(?)加(Jia)工(Gong)作(Zuo)压(Ya)力(Li)调(Diao)整(Zheng)静(Jing)压(Ya)螺(Luo)钉(Ding)来(Lai)克(Ke)服(Fu)静(Jing)压(Ya)影(Ying)响(Xiang)。(?)在(Zai)静(Jing)压(Ya)螺(Luo)钉(Ding)调(Diao)过(Guo)后(Hou)，(?)用(Yong)内(Nei)六(Liu)角(Jiao)扳(Ban)手(Shou)将(Jiang)差(Cha)压(Ya)变(Bian)送(Song)器(Qi)容(Rong)腔(Qiang)内(Nei)膜(Mo)盒(He)连(Lian)接(Jie) C型(Xing)簧(Huang)片(Pian)与(Yu)引(Yin)出(Chu)轴(Zhou)松(Song)开(Kai)，(?)使(Shi)膜(Mo)盒(He)处(Chu)于(Yu)自(Zi)然(Ran)放(Fang)松(Song)状(Zhuang)态(Tai)，(?)然(Ran)后(Hou)再(Zai)拧(Ning)紧(Jin)，(?)重(Zhong)新(Xin)检(Jian)定(Ding)一(Yi)遍(Bian)。(?) 

   3.这(Zhe)一(Yi)实(Shi)例(Li)还(Huan)有(You)另(Ling)一(Yi)个(Ge)原(Yuan)因(Yin)：(?)即(Ji)总(Zong)阀(Fa)门(Men)在(Zai)节(Jie)流(Liu)装(Zhuang)置(Zhi)以(Yi)前(Qian)安(An)装(Zhuang)。(?)当(Dang)停(Ting)汽(Qi)后(Hou)管(Guan)道(Dao)内(Nei)因(Yin)蒸(Zheng)汽(Qi)逐(Zhu)渐(Jian)冷(Leng)凝(Ning)成(Cheng)水(Shui)而(?)压(Ya)力(Li)逐(Zhu)渐(Jian)降(Jiang)低(Di)，(?)至(Zhi)使(Shi)加(Jia)工(Gong)作(Zuo)静(Jing)压(Ya)的(De)外(Wai)部(Bu)条(Tiao)件(Jian)发(Fa)生(Sheng)了(Liao)变(Bian)化(Hua)。(?)如(Ru)果(Guo)总(Zong)阀(Fa)门(Men)在(Zai)节(Jie)流(Liu)装(Zhuang)置(Zhi)以(Yi)后(Hou)安(An)装(Zhuang)，(?)当(Dang)总(Zong)阀(Fa)门(Men)关(Guan)闭(Bi)后(Hou)，(?)管(Guan)道(Dao)内(Nei)虽(Sui)然(Ran)也(Ye)会(Hui)有(You)冷(Leng)凝(Ning)水(Shui)出(Chu)现(Xian)，(?)但(Dan)管(Guan)道(Dao)中(Zhong)压(Ya)力(Li)自(Zi)始(Shi)至(Zhi)终(Zhong)会(Hui)同(Tong)主(Zhu)管(Guan)道(Dao)相(Xiang)同(Tong)，(?)这(Zhe)时(Shi)通(Tong)过(Guo)调(Diao)整(Zheng)零(Ling)点(Dian)克(Ke)服(Fu)静(Jing)压(Ya)是(Shi)*可(Ke)行(Xing)的(De)。(?) 

  4.对(Dui)于(Yu)连(Lian)续(Xu)用(Yong)气(Qi)且(Qie)压(Ya)力(Li)较(Jiao)为(Wei)稳(Wen)定(Ding)的(De)用(Yong)户(Hu)，(?)通(Tong)过(Guo)加(Jia)工(Gong)作(Zuo)压(Ya)力(Li)调(Diao)整(Zheng)零(Ling)点(Dian)克(Ke)服(Fu)静(Jing)压(Ya)也(Ye)未(Wei)尝(Chang)不(Bu)可(Ke)。(?)