CN111237536A - Heat energy individual control valve and special full mechanical key thereof - Google Patents

Heat energy individual control valve and special full mechanical key thereof Download PDF

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Publication number
CN111237536A
CN111237536A CN202010036770.7A CN202010036770A CN111237536A CN 111237536 A CN111237536 A CN 111237536A CN 202010036770 A CN202010036770 A CN 202010036770A CN 111237536 A CN111237536 A CN 111237536A
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CN
China
Prior art keywords
key
fastening
heat energy
control valve
sleeve
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
CN202010036770.7A
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Chinese (zh)
Inventor
邓国龙
温秦生
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.)
Qingdao Jiasheng Energy Technology Co Ltd
Original Assignee
Qingdao Jiasheng Energy Technology 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 Qingdao Jiasheng Energy Technology Co Ltd filed Critical Qingdao Jiasheng Energy Technology Co Ltd
Priority to CN202010036770.7A priority Critical patent/CN111237536A/en
Publication of CN111237536A publication Critical patent/CN111237536A/en
Pending legal-status Critical Current

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K35/00Means to prevent accidental or unauthorised actuation
    • F16K35/06Means to prevent accidental or unauthorised actuation using a removable actuating or locking member, e.g. a key
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K35/00Means to prevent accidental or unauthorised actuation
    • F16K35/16Means to prevent accidental or unauthorised actuation with locking member actuated by magnet
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K5/00Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/06Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Preventing Unauthorised Actuation Of Valves (AREA)

Abstract

The invention relates to a heat energy household control valve and a special all-mechanical key thereof, which comprise a ball valve, wherein a valve rod is arranged on the ball valve, the valve rod is connected with a handle through an anti-theft screw, the outer diameter of an upper top cover of the anti-theft screw is larger than that of a nut below the anti-theft screw, the heat energy household control valve also comprises a key for loosening and tightening the anti-theft screw, the key comprises a key sleeve and a key body, the key body and the key sleeve are positioned through a positioning groove, the bottom of the key body is hinged with a clamping jaw group, a clamp capable of being tightened is arranged on the outer side of the key sleeve, the clamping jaw group comprises a clamping jaw and a clamping groove, and magnetic cores are arranged in the clamping jaw and the clamping groove.

Description

Heat energy individual control valve and special full mechanical key thereof
Technical Field
The invention relates to a heat energy household control valve and a special full-mechanical key thereof.
Background
The anti-theft effect of various anti-theft valves on the current market is not ideal, and the reason for the anti-theft effect is mainly the anti-theft integral effect function. They can easily steal the medium inside the pipeline or the valve fittings or switch the pipeline without permission, thereby causing management difficulty and economic loss.
Disclosure of Invention
The invention aims to solve the technical problem of providing a heat energy household control valve which can avoid misoperation and has an anti-theft function and is convenient to control and manage and a special full-mechanical key thereof.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a heat energy household control valve and a special full-mechanical key thereof comprise a ball valve, wherein the ball valve comprises a valve body, a valve rod is arranged on the valve body, a handle is sleeved at the top of the valve rod and provided with a through hole, a threaded hole is formed in the top of the valve rod, an anti-theft screw is arranged in the through hole and the threaded hole and comprises a top cover and a nut, the nut is positioned above the through hole and below the top cover, the anti-theft screw is used for connecting the handle and the valve rod, so that the state of the valve is controlled, the outer diameter of the top cover is larger than that of the nut, the nut is positioned below the top cover, the top of the handle is in threaded connection with a sealing cover, and the anti-theft screw is positioned below the;
the anti-theft screw is characterized by further comprising a key for loosening and tightening the anti-theft screw, the key comprises a key sleeve, the key sleeve is sleeved with a key body, the top of the key body penetrates through the key sleeve to be provided with a warping rod, the key body is provided with a positioning groove, the top of the key sleeve is provided with a positioning snap ring matched with the positioning groove to position the key body, the key body below the positioning groove is provided with a spring, the upper end of the spring is fixed on the key body, the lower end of the spring is fixed on the key sleeve, the bottom of the key body is hinged with a jaw group, the key sleeve is provided with a plurality of groups of fastening through holes with symmetrical axes of the key sleeve above the hinged joint of the key body and the jaw group, fastening blocks are arranged in the fastening through holes and positioned on a clamp outside the key sleeve, the clamp is screwed up, the jack catch afterbody tightens up, thereby the jack catch with the screens groove expands, and is convenient the jack catch with fastening screw parts, jack catch group including when folding with the nut match suitable jack catch and when folding with the top cap matches suitable screens groove, the jack catch with the screens inslot is equipped with the magnetic core, is used for adsorbing the nut with the top cap, it is more convenient to screw up and unscrew.
As a preferred technical scheme, the handle is provided with a plurality of positioning grooves, and the positioning grooves are used for positioning the handle at least two positions on a circumference so that the ball valve is in different states.
As the preferred technical scheme, the constant head tank is located the handle bottom, the constant head tank is including normally opening the constant head tank, normally closing constant head tank and free switch constant head tank, the valve body upper end is equipped with the location dog, the location dog is located arbitrary in the constant head tank.
As the preferred technical scheme, one side of free switch constant head tank is equipped with the fastening groove, be equipped with the fastening block in the fastening groove, fastening block outside fixed connection fastening bolt, the last fastening nut that is equipped with of fastening bolt, when the location dog in the constant head tank fastens, the handle locking, can not remove, can use ordinary spanner to adjust fastening bolt with fastening nut can make the handle is located and can not be operated by random under the free on-off state, avoids the maloperation.
As a preferred technical scheme, the inner side of the fastening block is matched with the outer surface of the valve rod, and anti-skid grains are arranged on the inner side of the fastening block.
Preferably, the diameter of the inner cross section of the fastening groove is larger than that of the outer cross section of the fastening groove, so that the positioning stopper cannot fall off when the positioning stopper is not required to be operated.
As a preferred technical scheme, the positioning snap ring is provided with a plurality of groups of clamping convex blocks which take the axis of the key sleeve as a symmetrical axis, and a circular arc shape is arranged between the lower surface of the positioning groove and the outer surface of the key sleeve.
As the preferred technical scheme, the outer side of the positioning clamping ring is connected with an elastic ring, a plurality of transverse springs are arranged in the elastic ring, elastic fillers are arranged between the transverse springs, and the opposite clamping planes are expanded.
As an optimized technical scheme, the key body is sleeved with the tilting rod through the connecting through hole, an internal thread is arranged in the connecting through hole, one side of the tilting rod is provided with a hanging ring, the other side of the tilting rod is a horizontal head, the maximum width of the horizontal head is larger than the diameter of the connecting through hole, and an external thread matched with the internal thread of the connecting through hole is arranged in the middle of the tilting rod.
As preferred technical scheme, the screens groove is located when the key sleeve is outside, the clamp is located the key body with the jack catch group pin joint with between the top of jack catch group, guarantee the clamp can be right the jack catch group operates.
Due to the adoption of the technical scheme, the heat energy household control valve and the special full-mechanical key thereof comprise a ball valve, wherein the ball valve comprises a valve body, a valve rod is arranged on the valve body, a handle is sleeved at the top of the valve rod and provided with a through hole, a threaded hole is formed in the top of the valve rod, an anti-theft screw is arranged in the through hole and the threaded hole and comprises a top cover and a nut, the nut is positioned above the through hole, the nut is positioned below the top cover, the outer diameter of the top cover is larger than that of the nut, the top of the handle is in threaded connection with a sealing cover, and the anti-theft screw is positioned below the sealing cover;
still including being used for unscrewing and screwing up anti-theft screw's key, the key includes the key sleeve, the key sleeve cup joints the key body, the key body top is passed the key sleeve is equipped with sticks up the pole, be equipped with the location slot on the key body, key sleeve top be equipped with the location slot matches suitable location snap ring, location slot below the key body is equipped with the spring, the upper end of spring is fixed in on the key body, the lower extreme of spring is fixed in on the key sleeve, the articulated jack catch group in key body bottom, the key sleeve is in the key body with the top of jack catch group pin joint is equipped with a plurality of groups with the symmetrical fastening hole of key sleeve axis, be equipped with the fastening piece in the fastening hole, the fastening piece is located on the clamp in the key sleeve outside, the jack catch group including when assembling with the nut matches suitable jack catch and when assembling with the top cap matches the fastening hole of key sleeve axis, the jack catch The clamping jaw and the clamping groove are internally provided with magnetic cores; when the key is used, the tilting rod is rotated to the middle thread section, the fastening screw is conveniently taken out, the key body is pressed downwards, the positioning clamping ring is moved out of the positioning groove, the key body is continuously pressed downwards, the clamping jaw and the clamping groove are pushed out of the key sleeve, the clamping jaw is clamped on the fastening screw, the top cover is clamped in the clamping groove, the clamping jaw is fixed on the nut, the magnetic core is further fastened, the pressing force is removed, the clamping jaw group moves back into the key sleeve under the action of the spring, then the fastening screw is loosened by rotating, the handle is rotated to a required position, the fastening screw is screwed by reverse rotation, the key body is pressed downwards, the clamping hoop is screwed, the clamping jaw is separated from the nut, and the key body is removed; if the handle rotates to a free switch state, the fastening nut is screwed down, so that the fastening block is fully contacted with the upper part of the valve rod, and the handle is fastened. The invention has an anti-theft structure, is particularly suitable for being used on unattended pipelines, prevents the valve from being opened and closed privately, prevents the pipeline medium and the valve accessory from being stolen, and can avoid loss and damage caused by misoperation at the same time.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of the internal structure of a key according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of a key according to an embodiment of the present invention;
FIG. 3 is a schematic view showing an internal structure of a ball valve according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a ball valve according to an embodiment of the present invention;
FIG. 5 is a schematic view of a positioning groove structure according to the present invention;
FIG. 6 is a cross-sectional view of the positioning groove of the present invention;
FIG. 7 is a schematic view of the construction of the fastening bolt of the present invention;
fig. 8 is a schematic view of the handle structure of the present invention.
In the figure: 1-a ball valve; 2-a valve body; 3-a valve stem; 4-a handle; 5-anti-theft screw; 6-top cover; 7-a nut; 8-sealing cover; 9-a key sleeve; 10-a key body; 11-raising the rod; 12-positioning the groove; 13-positioning snap ring; 14-a spring; 15-fastening through holes; 16-a fastening block; 17-a clamp; 18-a jaw; 19-a clamping groove; 20-a magnetic core; 21-normally open positioning groove; 22-normally closed positioning groove; 23-free switch positioning groove; 24-positioning a stop block; 25-fastening grooves; 26-a fastening block; 27-a fastening bolt; 28-a fastening nut; 29-anti-skid lines; 30-clamping the bumps; 31-an elastic ring; 32-a transverse spring; 33-an elastomeric filler; 34-flatting the horizontal header; 35-hanging ring.
Detailed Description
Example (b): as shown in figures 1 to 8 of the drawings,
a heat energy household control valve and a special full-mechanical key thereof comprise a ball valve 1, wherein the ball valve 1 comprises a valve body 2, a valve rod 3 is arranged on the valve body 2, a handle 4 is sleeved on the top of the valve rod 3, a through hole is formed in the handle 4, a threaded hole is formed in the top of the valve rod 3, an anti-theft screw 5 is arranged in the through hole and the threaded hole, the anti-theft screw 5 comprises a top cover 6 and a nut 7, the nut 7 is positioned above the through hole, the nut 7 is positioned below the top cover 6, the anti-theft screw 5 is used for connecting the handle 4 and the valve rod 3, so that the state of the valve is controlled, the outer diameter of the top cover 6 is larger than that of the nut 7, the nut 7 is positioned below the;
the anti-theft screw is further composed of a key for loosening and tightening the anti-theft screw, the key comprises a key sleeve 9, the key sleeve 9 is sleeved with a key body 10, the top of the key body 10 penetrates through the key sleeve 9 and is provided with a tilting rod 11, the key body 10 is provided with a positioning groove 12, the top of the key sleeve 9 is provided with a positioning snap ring 13 matched with the positioning groove for positioning the key body, the key body 10 below the positioning groove 12 is provided with a spring 14, the upper end of the spring 14 is fixed on the key body 10, the lower end of the spring 14 is fixed on the key sleeve 9, the bottom of the key body 10 is hinged with a jaw set, the key sleeve 9 is provided with a plurality of fastening through holes 15 which are symmetrical along the axis of the key sleeve above the hinged joint of the key body 10 and the jaw set, fastening blocks 16 are arranged in the fastening through holes 15, the fastening blocks 16 are, therefore, the clamping jaws and the clamping grooves are expanded to facilitate the separation of the clamping jaws and the fastening screws, the clamping jaw group comprises the clamping jaws 18 matched with the nuts 7 during folding and the clamping grooves 19 matched with the top cover 6 during folding, magnetic cores 20 are arranged in the clamping jaws 18 and the clamping grooves 19 and used for adsorbing the nuts and the top cover, and the tightening and loosening are more convenient.
Furthermore, the handle is provided with a plurality of positioning grooves which are used for positioning the handle at least two positions on a circumference, so that the ball valve is in different states.
Further, the constant head tank is located handle 3 bottom, and the constant head tank is including normally opening constant head tank 21, normally closing constant head tank 22 and free switch constant head tank 23, and valve body 2 upper end is equipped with location dog 24, and location dog 24 locates in arbitrary constant head tank.
Further, one side of free switch constant head tank 23 is equipped with fastening groove 25, is equipped with fastening block 26 in the fastening groove 25, fastening block 26 outside fixed connection fastening bolt 27, is equipped with fastening nut 28 on the fastening bolt 27, and when the location dog in the constant head tank fastened, the handle was locked, and is unmovable, can use ordinary spanner to adjust fastening bolt and fastening nut, can make the handle be located and can not operated by random under the free switch state, avoids the maloperation.
Further, the inner side of the fastening block 26 is matched with the outer surface of the valve rod 3, and the inner side of the fastening block 26 is provided with anti-slip threads 27.
Further, the diameter of the cross section of the inner side of the fastening groove 25 is larger than that of the cross section of the outer side thereof, so that the positioning stopper cannot fall off when the positioning stopper is not required to be operated.
Furthermore, the positioning snap ring 13 is provided with a plurality of groups of clamping convex blocks 28 which take the axis of the key sleeve as a symmetry axis, and the space between the lower surface of the positioning groove 12 and the outer surface of the key sleeve 9 is in a circular arc shape.
Furthermore, the outer side of the positioning snap ring 13 is connected with an elastic ring 29, a plurality of transverse springs 30 are arranged in the elastic ring 29, elastic fillers 31 are arranged between the transverse springs 30, and the opposite clamping planes are expanded.
Further, the key body 10 is sleeved with the tilting rod 11 through the connecting through hole, internal threads are arranged in the connecting through hole, one side of the tilting rod 11 is provided with a hanging ring 32, the other side of the tilting rod is a horizontal straight head 33, the maximum width of the horizontal straight head 33 is larger than the diameter of the connecting through hole, and external threads matched with the internal threads of the connecting through hole are arranged in the middle of the tilting rod 11.
Further, when screens groove 19 was located key sleeve 9 outside, clamp 17 was located between key body and jack catch group pin joint and the top of jack catch group, guaranteed that the clamp can be operated jack catch group.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (10)

1. The utility model provides a heat energy divides family control flap and special full mechanical key thereof which characterized in that: the anti-theft screw comprises a top cover and a nut, the nut is positioned above the through hole, the nut is positioned below the top cover, the outer diameter of the top cover is larger than that of the nut, the top of the handle is in threaded connection with a sealing cover, and the anti-theft screw is positioned below the sealing cover;
still including being used for unscrewing and screwing up anti-theft screw's key, the key includes the key sleeve, the key sleeve cup joints the key body, the key body top is passed the key sleeve is equipped with sticks up the pole, be equipped with the location slot on the key body, key sleeve top be equipped with the location slot matches suitable location snap ring, location slot below the key body is equipped with the spring, the upper end of spring is fixed in on the key body, the lower extreme of spring is fixed in on the key sleeve, the articulated jack catch group in key body bottom, the key sleeve is in the key body with the top of jack catch group pin joint is equipped with a plurality of groups with the symmetrical fastening hole of key sleeve axis, be equipped with the fastening piece in the fastening hole, the fastening piece is located on the clamp in the key sleeve outside, the jack catch group including when assembling with the nut matches suitable jack catch and when assembling with the top cap matches the fastening hole of key sleeve axis, the jack catch The clamping groove is suitable, and the clamping jaw and the clamping groove are internally provided with magnetic cores.
2. The heat energy household control valve and the special full mechanical key thereof as claimed in claim 1, wherein: the handle is provided with a plurality of positioning grooves, and the positioning grooves are used for positioning the handle at least two positions on a circumference to enable the ball valve to be in different states.
3. The heat energy household control valve and the special full mechanical key thereof as claimed in claim 2, wherein: the constant head tank is located the handle bottom, the constant head tank is including normally opening the constant head tank, normally closing constant head tank and free switch constant head tank, the valve body upper end is equipped with the location dog, the location dog is located wantonly in the constant head tank.
4. The heat energy household control valve and the special full mechanical key thereof as claimed in claim 3, wherein: one side of the free switch positioning groove is provided with a fastening groove, a fastening block is arranged in the fastening groove, the outer side of the fastening block is fixedly connected with a fastening bolt, and the fastening bolt is provided with a fastening nut.
5. The heat energy household control valve and the special full mechanical key thereof as claimed in claim 4, wherein: the inner side of the fastening block is matched with the outer surface of the valve rod, and anti-skid grains are arranged on the inner side of the fastening block.
6. The heat energy household control valve and the special full mechanical key thereof as claimed in claim 4, wherein: the diameter of the cross section of the inner side of the fastening groove is larger than that of the cross section of the outer side of the fastening groove.
7. The heat energy household control valve and the special full mechanical key thereof as claimed in claim 1, wherein: the positioning clamping ring is provided with a plurality of groups of clamping convex blocks which take the axis of the key sleeve as a symmetrical shaft, and an arc shape is arranged between the lower surface of the positioning groove and the outer surface of the key sleeve.
8. The heat energy household control valve and the special full mechanical key thereof as claimed in claim 1, wherein: the outer side of the positioning snap ring is connected with an elastic ring, a plurality of transverse springs are arranged in the elastic ring, and elastic fillers are arranged between the transverse springs.
9. The heat energy household control valve and the special full mechanical key thereof as claimed in claim 1, wherein: the key body cup joints through connect the via hole stick up the pole, be equipped with the internal thread in the connect the via hole, stick up pole one side and be equipped with the link, the opposite side is one word head of flat partially, the maximum width of one word head of flat partially is greater than connect the via hole's diameter, stick up the pole middle part be equipped with connect the via hole internal thread matches the external screw thread that suits.
10. The heat energy household control valve and the special full mechanical key thereof as claimed in claim 1, wherein: the screens groove is located when the key sleeve is outside, the clamp is located the key body with the jack catch group pin joint with between the top of jack catch group.
CN202010036770.7A 2020-01-14 2020-01-14 Heat energy individual control valve and special full mechanical key thereof Pending CN111237536A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010036770.7A CN111237536A (en) 2020-01-14 2020-01-14 Heat energy individual control valve and special full mechanical key thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010036770.7A CN111237536A (en) 2020-01-14 2020-01-14 Heat energy individual control valve and special full mechanical key thereof

Publications (1)

Publication Number Publication Date
CN111237536A true CN111237536A (en) 2020-06-05

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ID=70863529

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010036770.7A Pending CN111237536A (en) 2020-01-14 2020-01-14 Heat energy individual control valve and special full mechanical key thereof

Country Status (1)

Country Link
CN (1) CN111237536A (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1251064A (en) * 1997-03-26 2000-04-19 Sfs工业控股公司 Screwing element
US20030217771A1 (en) * 2002-05-27 2003-11-27 Seung-Jun Oh Half ball valve
CN201133488Y (en) * 2007-12-29 2008-10-15 浙江盾安阀门有限公司 Ball valve locking structure and its key
CN202252277U (en) * 2011-09-16 2012-05-30 伯纳德(天津)仪表技术有限公司 Novel valve controller
CN106015627A (en) * 2016-08-04 2016-10-12 宁波杰克龙精工有限公司 Anti-theft ball valve and key component thereof
CN209681188U (en) * 2019-04-17 2019-11-26 新达泵阀股份有限公司 Double suction centrifugal pump boring bar drive plate

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1251064A (en) * 1997-03-26 2000-04-19 Sfs工业控股公司 Screwing element
US20030217771A1 (en) * 2002-05-27 2003-11-27 Seung-Jun Oh Half ball valve
CN201133488Y (en) * 2007-12-29 2008-10-15 浙江盾安阀门有限公司 Ball valve locking structure and its key
CN202252277U (en) * 2011-09-16 2012-05-30 伯纳德(天津)仪表技术有限公司 Novel valve controller
CN106015627A (en) * 2016-08-04 2016-10-12 宁波杰克龙精工有限公司 Anti-theft ball valve and key component thereof
CN209681188U (en) * 2019-04-17 2019-11-26 新达泵阀股份有限公司 Double suction centrifugal pump boring bar drive plate

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Application publication date: 20200605