CN108533826B

CN108533826B - Valve lock and valve lock control system

Info

Publication number: CN108533826B
Application number: CN201810318365.7A
Authority: CN
Inventors: 陈勇; 王媛媛; 邱灿彭; 张斌; 唐明
Original assignee: Changyuan Contron Power Security Technology Co Ltd
Current assignee: Changyuan Contron Power Security Technology Co Ltd
Priority date: 2018-04-11
Filing date: 2018-04-11
Publication date: 2020-01-17
Anticipated expiration: 2038-04-11
Also published as: CN108533826A

Abstract

The invention discloses a valve lock and a valve locking and controlling system, wherein a main lock is fixedly arranged on an operating mechanism of a valve, a locking matching piece is arranged on a valve body below the operating mechanism of the valve, and the operating mechanism is locked at a valve closing position or a valve opening position of the locking matching piece by using a locking mechanism, so that the random rotation of the operating mechanism is limited. The invention also realizes the valve state detection by arranging a magnetic element on the valve body or the locking matching piece below the operating mechanism, arranging a magnetic induction unit on the main lockset and arranging a state detection circuit in the main lockset. In addition, the valve lock provided by the invention can be matched with a computer key, a parameter acquisition device and a management host to form a whole set of valve lock control system, so that the systematic management and monitoring of valve unlocking control and switch state detection are realized.

Description

Valve lock and valve lock control system

All as the field of technology

The invention relates to a valve lock and a valve locking and controlling system based on the same.

All the above-mentioned background techniques

The valve is used for flow control, and the application field of the valve is very wide. Taking the field of petrochemical industry as an example, a large number of valves are used in a transportation system, a measurement and control system and the like. There are various valves according to different application requirements or environments, and the valves have certain differences in their structures or sizes, but the basic principles are different.

A general valve includes a valve body, a valve rod disposed on the valve body to control opening and closing of a fluid passage in the valve body, and an operating mechanism, which is usually a handwheel or a handle for controlling the valve rod to ascend or descend. The valve can be opened, closed or regulated by rotating the operating mechanism.

In the prior art, in order to prevent the valve from being operated by people by mistake, a locking device is arranged on the valve, however, the locking device in the prior art only covers and seals a hand wheel or a handle, and the locking device is easy to shake and is damaged. In addition, the existing locking device can only lock the valve but cannot control the unlocking valve, and the state of the valve cannot be detected, so that the system management and monitoring are not facilitated.

All the contents of the invention

The invention aims to provide a valve lock which is used for locking a valve and has the characteristics of stable structure, practicability and reliability. The above object of the present invention is achieved by the following technical solutions:

a valve lock comprises a valve body, an operating mechanism and a valve rod, wherein the valve rod is assembled in the valve body and is driven by the operating mechanism to control the opening and closing of the valve; the method is characterized in that: the valve lock comprises a main lock and a locking matching piece, the locking matching piece is fixedly arranged on the valve body below the operating mechanism, the main lock is fixedly arranged on the operating mechanism, and the main lock comprises a lock body and a locking mechanism arranged on the lock body; and a valve closing position locking mechanism is arranged on the locking matching piece corresponding to the closing position of the valve, and when the valve lock moves to the closing position of the valve along with the operating mechanism, the locking mechanism is controlled to be locked or unlocked with the valve closing position locking mechanism.

As a specific technical scheme, a valve opening position locking mechanism is arranged on the locking matching piece corresponding to the closing position of the valve, and when the valve lock moves to the opening position of the valve along with the operating mechanism, the locking mechanism is controlled to be locked or unlocked with the valve opening position locking mechanism.

As a specific technical scheme, the valve opening position locking mechanism and the valve closing position locking mechanism are locking holes which are respectively formed on the locking matching piece corresponding to the valve opening position and the valve closing position; the locking mechanism comprises a lock cylinder, a lock pin and a lock bolt, the lock bolt is controlled to move between a locking position and an unlocking position, and the lower end of the lock bolt is matched with or separated from the locking hole; the lock bolt is provided with a locking position lock pin matching groove, and the lock pin is matched with or separated from the locking position lock pin matching groove under the control of the lock core to lock or release the lock bolt at the locking position.

As a specific technical scheme, an unlocking position lock pin matching groove is further formed in the lock bolt, and the lock pin is matched with or separated from the unlocking position lock pin matching groove under the control of the lock cylinder to lock or release the lock bolt at the unlocking position.

As a specific technical scheme, the valve lock further comprises a first magnet and a second magnet which are arranged on the valve body below the operating mechanism or on the locking matching piece, and the positions of the first magnet and the second magnet are respectively corresponding to or opposite to the valve opening position locking mechanism and the valve closing position locking mechanism; the valve lock further comprises a first magnetic induction unit and a second magnetic induction unit, wherein the first magnetic induction unit and the second magnetic induction unit are arranged at the bottom of the lock body and are used for sensing the first magnet and the second magnet respectively.

As a specific technical scheme, the valve lock further comprises a circuit board and radio frequency code chips, wherein a state detection circuit is arranged on the circuit board, the state detection circuit comprises a logic switch module and at least two radio frequency chips, one end of each of the at least two radio frequency chips is respectively connected with one optional wiring terminal of the logic switch module, and the other end of each radio frequency chip is grounded; the fixed wiring terminal of the logic switch module is connected with one end of the radio frequency antenna of the radio frequency chip, and the other end of the radio frequency antenna is grounded; and the respective induction signal output ends of the first magnetic induction unit and the second magnetic induction unit are respectively connected with one control signal input end of the logic switch module.

As a specific technical scheme, the valve lock further comprises a circuit board and radio frequency code sheets, wherein a state detection circuit is arranged on the circuit board and comprises at least two radio frequency chips, the magnetic induction units are magnetic induction switches, one ends of the at least two radio frequency chips are respectively connected with one ends of the first magnetic induction unit and the second magnetic induction unit, and the other ends of the at least two radio frequency chips are grounded; the other ends of the first magnetic induction unit and the second magnetic induction unit are connected with one end of a radio frequency antenna of the radio frequency chip, and the other end of the radio frequency antenna is grounded.

As a specific technical scheme, a circuit board assembly groove is formed in the main lockset, and the circuit board is arranged in the circuit board assembly groove; the radio frequency chip is arranged at the front end of the lock cylinder.

As a specific technical scheme, the locking fitting piece further comprises a valve stroke limiting column and a valve stroke limiting sheet, wherein the valve stroke limiting column is fixedly arranged on the locking fitting piece or the valve body below the operating mechanism, and the valve stroke limiting sheet is fixedly arranged or integrally formed on the operating mechanism, the valve stroke limiting column and the valve stroke limiting sheet form interference to limit the rotation stroke of the operating mechanism.

The invention further aims to provide a valve locking and controlling system, which is based on the valve lock, realizes the control of unlocking and locking of the valve, and simultaneously acquires the opening and closing states of the valve for systematic management and monitoring. The above-mentioned another object of the present invention is achieved by the following technical solutions:

a valve locking and controlling system comprises a valve body, an operating mechanism and a valve rod, wherein the valve rod is assembled in the valve body and is driven by the operating mechanism to control the opening and closing of the valve; the system is characterized in that the valve locking and controlling system comprises a parameter acquisition device, a management host, a computer key and a lockset; the acquisition end of the parameter acquisition device is arranged at a parameter acquisition position related to the process flow where the valve is positioned, and the parameter output end is connected with the parameter input end of the management host; the management host is in communication connection with the computer key; the computer key supplies power to the lock, is in communication connection with the lock and is matched with the mechanical unlocking of the lock; the lock adopts the valve lock.

As a further technical scheme, the valve locking and control system further comprises a mobile terminal, and the management host is in indirect communication connection with the computer key through the mobile terminal.

The invention has the beneficial effects that: the main lockset is fixedly arranged on the operating mechanism of the valve, the locking fitting piece is arranged on the valve body below the operating mechanism of the valve, and the locking mechanism is used for locking the operating mechanism at the valve closing position or the valve opening position of the locking fitting piece, so that the random rotation of the operating mechanism is limited, and in this way, the lockset for locking and managing and controlling the valve is provided, and the multifunctional locking mechanism has the characteristics of stable structure, practicability and reliability. The invention also realizes the valve state detection by arranging a magnetic element on the valve body or the locking matching piece below the operating mechanism, arranging a magnetic induction unit on the main lockset and arranging a state detection circuit in the main lockset. In addition, the valve lock provided by the invention can be matched with a computer key, a parameter acquisition device and a management host to form a whole set of valve lock control system, so that the systematic management and monitoring of valve unlocking control and switch state detection are realized.

Description of the drawings

Fig. 1 is a state diagram of a valve lock according to an embodiment of the present invention locking a handle of a valve.

Fig. 2 is a state diagram of a valve lock according to an embodiment of the present invention when a main lock is separated from a mating latch.

Fig. 3 is an exploded view of a valve lock according to an embodiment of the present invention.

Fig. 4 is a schematic view illustrating a lock body limit pin and a handle pressing member of the valve lock according to an embodiment of the present invention.

Fig. 5 is a circuit diagram of an implementation manner of a state detection circuit in a valve lock according to a first embodiment of the present invention.

Fig. 6 is a structural diagram of another implementation manner of a state detection circuit in a valve lock according to an embodiment of the present invention.

Fig. 7 is a configuration diagram of a valve lock control system according to a second embodiment of the present invention.

Fig. 8 is a state diagram of the valve lock according to the third embodiment of the present invention locking the handle of the valve.

Fig. 9 is a state diagram of the valve lock according to the third embodiment of the present invention when the main lock is separated from the mating latch.

Fig. 10 is an exploded view of a valve lock according to a third embodiment of the present invention.

(specific embodiments) in all cases

The following further describes embodiments of the present invention with reference to the accompanying drawings:

example one

This embodiment provides a valve lock for manage and control the valve, make the valve can not be controlled at will. Fig. 1, fig. 2 and fig. 3 are schematic diagrams illustrating a valve lock and a relevant part of a valve, wherein the valve includes a valve body 900, an operating mechanism and a valve rod, the operating mechanism includes a handle 901 and a handle pressing member 902, the valve rod is assembled in the valve body 900, and the opening and closing of a fluid passage in the valve body 900 are controlled by the handle 901; handle follower 902 rotatably mounts handle 901 to valve body 900 for limiting axial movement of the handle relative to the valve body.

The valve lock comprises a main lock 10 and a locking fitting 20, wherein the locking fitting 20 is fixedly arranged on a valve body below a handle 901, and the main lock 10 is detachably fixed on the handle 901.

Referring to fig. 3, the main lock 10 includes a lock body 11, a lock body stopper pin 12, an rf chip 131, a lock cylinder 13, a lock pin assembly 14, a lock bolt assembly 15, a lock body mating member 16, a circuit board 17, a sealing plate 18, a padlock accessory 19, a first magnetic induction unit 115, and a second magnetic induction unit 116. The lock pin assembly 14 further includes a lock pin body 141 and a lock pin spring 142, the latch assembly 15 further includes a latch body 151, a latch spring 152 and a latch stopper 153, and the padlock accessory 19 further includes a padlock accessory fixing plate 191 and a padlock accessory moving plate 192.

Referring to fig. 3 and 4, an assembly groove 9021 is formed in the periphery of a handle pressing member 902 of the valve, the lower end of a lock body 11 is sleeved on the periphery of the handle pressing member 902, and a main lock 10 is fixedly mounted on an operating mechanism of the valve through the cooperation of a lock body limiting pin 12 and the assembly groove 9021, so that the main lock 10 rotates relative to the valve along with the handle 901 but cannot move axially. It will be appreciated that the primary lock 10 may also be fixedly mounted directly to the handle 901.

Lock cylinder pilot holes 111 and lock plunger pilot holes 112 have vertically been seted up on the lock body 11, and the lock pin pilot holes have been seted up to the left right side in the lock body 11 inside, and lock plunger pilot holes 112 link up lock body 11 upper and lower both ends, and the lock pin pilot holes communicates with lock cylinder pilot holes 111 and lock plunger pilot holes 112 respectively.

The front end of the lock cylinder 13 is fixedly provided with a radio frequency chip 131, the radio frequency chip 131 is provided with a key through hole, and the lock cylinder 13 and the radio frequency chip 131 are fixedly arranged in the lock cylinder assembling hole 111. The latch pin 141 is movably fitted into the latch pin fitting hole, and its rear end is urged by a latch spring 142 and its front end is inserted into the latch pin fitting hole 112. The key cylinder 13 drives the lock pin 141 to reciprocate in the pin fitting hole. In this embodiment, the driving end of the lock cylinder 13 is a semi-cylinder 132, one side of the lock pin 141 is provided with a shifting groove 1411 matched with the semi-cylinder, and when the key rotates the rotating shaft of the lock cylinder 13, the semi-cylinder 132 and the lock pin spring 142 drive the lock pin 141 to reciprocate.

The latch fitting hole 112 is a stepped hole, and the latch body 151 includes a relatively thick upper pressing operation portion 1511 and a relatively thin lower latch rod portion 1512; the latch spring 152 is sleeved on the latch rod 1512, and has an upper end abutting against the pressing operation portion 1511 and a lower end abutting against a step surface in the step hole. A stopper groove is formed on one side of the pressing operation part 1511, and the latch stopper 153 is fitted into the latch fitting hole 112 so that the latch body 151 can move up and down by being engaged with the stopper groove. The side of the latch rod 1512 facing the latch pin 141 defines a latch detent mating groove 15121 and an unlatch detent mating groove 15122 for receiving the latch pin 141 therein to lock the latch body 151 in a latched position and an unlatched position, respectively. It will be appreciated that the basic locking function is achieved by providing only one latching detent engagement slot.

The first magnetic induction unit 115 and the second magnetic induction unit 116 are respectively disposed at two ends of the bottom of the lock body 11, and are configured to sense two magnets disposed on the locking mating member, and cooperate with a valve state detection circuit on the circuit board 17 to detect an open/close state of the valve (described in detail below). The lock body mating member 16 is fixedly assembled on the upper portion of the lock body 11 by screws, and the sealing plate 18 sealingly arranges the circuit board 17 in a circuit board assembling groove formed on the lock body mating member 16. The circuit board 17 is electrically connected to the first magnetic induction unit 115, the second magnetic induction unit 116 and the rf chip 131 through wires. The lock body fitting piece 16 mainly has the functions of facilitating the installation of the circuit board 17 on the main lock 10 and facilitating the routing between the circuit board 17 and the magnetic induction element and the radio frequency chip 131, has no special requirements on the structure, and can be integrally formed with the lock body under the condition that the process conditions are met.

The padlock attachment 19 is used for padlock locking of the cylinder fitting hole 111 of the lock body 11, preventing malicious operation of the cylinder 13. Padlock annex stationary blade 191 is fixed to be set up in lock body fitting piece 16 upper surface to stretch out lock body fitting piece 16 upper surface edge partly, padlock annex movable blade 192 has a inflection portion and shielding part, and this inflection portion articulates in the part that padlock annex stationary blade 191 stretches out lock body fitting piece 16 upper surface edge, and this shielding part shelters from lock core mounting hole 111, and inflection portion with the padlock annex stationary blade 191 stretches out the corresponding padlock hole of having seted up of part at lock body fitting piece 16 upper surface edge.

As shown in fig. 3, the latch fitting 20 includes a latch plate 21, a latch plate holder 22, a valve travel limit post 23, a first magnet 241, and a second magnet 242. The locking disk 21 is fixedly arranged on the valve body below the handle 901 of the valve through a locking disk fixing member 22, the first magnet 241 and the second magnet 242 are arranged on one side of the upper surface of the locking disk 21, and the valve stroke limiting column 23 is fixedly arranged above the locking disk 21 and is positioned between the first magnet 241 and the second magnet 242. The other side of the upper surface of the latching plate 21 is provided with a valve-open-position latching hole 211 and a valve-close-position latching hole 212 at positions opposite to the first and

second magnets

241 and 242.

In this embodiment, the handle 901 is provided with a locking hole 9011, which is used for the above-mentioned bolt rod 1512 to pass through the hole and then to cooperate with the valve-open-position locking hole 211 and the valve-closed-position locking hole 212 when moving downward, so as to lock the handle 901 in the valve-open position or the valve-closed position (the locking hole 9011 is mainly provided to enhance the locking strength and avoid interference between the bolt and the handle when moving downward and locking, and if there is no interference between the bolt and the handle, the locking hole 9011 can be eliminated). In addition, a valve stroke limiting piece 905 is further arranged on the handle 901, and is used for forming interference with a valve stroke limiting column 23 arranged on the locking disc 21 to limit the rotating stroke of the handle 901.

The circuit board 17 is provided with a state detection circuit for processing signals sensed by the first magnetic induction unit 115 and the second magnetic induction unit 116, and the state detection circuit is matched with the radio frequency chip 131 to realize power supply and communication with a computer key. Referring to fig. 5, the state detection circuit includes a logic switch module, a first rf chip, and a second rf chip, where one end of each of the first rf chip and the second rf chip is connected to one selectable terminal of the logic switch module, and the other end of each of the first rf chip and the second rf chip is grounded; the fixed wiring terminal of the logic switch module is connected with one end of a radio frequency antenna of the radio frequency chip, and the other end of the radio frequency antenna is grounded; the respective sensing signal output ends of the first magnetic induction unit 115 and the second magnetic induction unit 116 are respectively connected to one control signal input end of the logic switch module.

When the handle 901 is rotated to make the valve in a fully open state, the second magnetic induction unit 116 is located above the second magnet 242, and the second magnetic induction unit 116 senses a signal and provides the signal to the circuit board 17; when the handle 901 is rotated to make the valve in the fully closed state, the first magnetic induction unit 115 is located above the first magnet 241, and the first magnetic induction unit 115 senses a signal and provides the signal to the circuit board 17.

In the state detection circuit, the logic switch module is used for acquiring two paths of output signals of the first magnetic induction unit and the second magnetic induction unit, connecting one of the radio frequency chips with the radio frequency antenna according to the states of the two paths of output signals, and judging the state of the controlled valve according to the state, wherein the output signals of the two paths of switches, the conditions of connecting the radio frequency chips and the corresponding valve state information are shown in table 1 below.

Second magnetic induction unit	A first magnetic induction unit	Radio frequency chip on condition	Valve and lock state
				Output 1	Output 0	Switching on the first RF chip	The valve being in an open state
Output 0	Output 1	Switching on the second RF chip	The valve being in a closed state

TABLE 1

In practical applications, the number of the magnetic induction units and the number of the radio frequency ICs may be increased or decreased according to the state of the valve to be acquired (for example, the state of the valve between open and close states needs to be acquired), for example, a set of radio frequency ICs for detecting the intermediate state is added.

In addition, in the circuit shown in fig. 5, the magnetic induction unit may use a reed switch, or a magnetic switch similar to the reed switch, as a signal input, or may use a hall device, or a device such as a piezoelectric sensor that reacts to a current change and a voltage change as an input signal, so as to turn on a corresponding radio frequency IC and output a corresponding code value, thereby reflecting the state of the valve.

In addition to the above solutions, the state detection circuit may also use the circuit shown in fig. 6, which is simple in connection, but only uses a magnetic switch similar to a reed switch, and switches on the corresponding rf IC through a change of the switching value to output the corresponding code value, thereby reflecting the state of the valve. Of course, the number of the reed switches and the number of the radio frequency chips can be increased or decreased according to the state of the valve to be acquired (for example, the state of the valve which needs to be acquired is opened or closed or is between the opening and the closing). The circuit shown in fig. 6 is shown in table 2 below for the output signals of the two switches, the condition of turning on the rf chip, and the corresponding valve state information.

First dry reed pipe	Second dry reed pipe	On IC condition	State of the corresponding valve
				1	0	Switching on the radio frequency chip 1	The valve being in an open state
0	1	Switching on the radio frequency chip 2	The valve being in a closed state

TABLE 2

Example two

The second embodiment provides a valve lock control system based on the valve lock provided in the first embodiment, and as shown in fig. 7, the valve lock control system includes a parameter acquisition device, a management host, a mobile terminal, a computer key and a lock; the acquisition end of the parameter acquisition device is arranged at a parameter acquisition position related to the process flow where the valve is located, and the parameter output end is connected with the parameter input end of the management host; the management host is in communication connection with the mobile terminal, and the mobile terminal is in communication connection with the computer key; the computer key supplies power to the lock, is in communication connection with the lock and is matched with the mechanical unlocking of the lock; the lockset adopts the valve lockset of the first embodiment.

The working principle of the valve locking and controlling system is described as follows:

various parameters in the process flow of the valve are collected through a parameter collecting device and sent to a management host;

analyzing the various parameters through the management host, and determining the time for operating the valve and whether the parameter change in the process flow after the valve is operated meets the preset requirement; for the confirmed operation opportunity, an unlocking instruction is generated and sent to the mobile terminal;

the unlocking instruction is transmitted to the computer key through the mobile terminal, when the computer key is unlocked, the computer key is inserted into a lock hole of a lock cylinder 13 of the valve lock, induction electric energy is provided for the radio frequency chip 131 (principle of wireless power supply), power is supplied to the state detection circuit, the circuit collects signals according to the state of the corresponding magnetic induction unit, the corresponding radio frequency chip is switched on, a code value is returned to the computer key through the radio frequency antenna after the radio frequency chip is switched on, the computer key confirms the identity of the valve and the current state of the valve by reading the code value, and the valve lock is unlocked under the condition that the control host machine allows unlocking (under the condition that the control system does not allow unlocking, the state of the valve and the lock can be collected only). For safety reasons, locking the lock with a computer key does not require the permission of a control system.

EXAMPLE III

As shown in fig. 8, 9 and 10, the valve lock according to the third embodiment is different from the first embodiment mainly in the following portions:

(1) in the first embodiment, the locking mating member of the locking mating member is a locking disc and is fixedly arranged on the valve body below the handle of the valve through a fixing member; in the embodiment, the locking matching mechanism is a sector locking piece 21;

(2) in the first embodiment, one valve stroke limiting column is arranged on the locking disc; in the present embodiment, there are two valve stroke limiting posts, one valve stroke limiting post 232 is disposed on the valve body below the handle 901, and the other valve stroke limiting post 231 is disposed on the fan-shaped locking piece 21;

(3) in the first embodiment, the circuit board is assembled in the lock body mating member 16 of the main lock; and the circuit board is assembled in the lock body 11 of the main lock in the embodiment.

(4) In the first and third embodiments, the position of the locked mechanism (locking hole 9011) provided in the operating mechanism 901 is different.

The above embodiments are merely provided for full disclosure and not for limitation, and any replacement of equivalent technical features based on the gist of the present invention without creative efforts should be considered as the scope of the present disclosure.

Claims

1. A valve lock comprises a valve body, an operating mechanism and a valve rod, wherein the valve rod is assembled in the valve body and is driven by the operating mechanism to control the opening and closing of the valve; the valve lock comprises a main lock and a locking matching piece, the locking matching piece is fixedly arranged on the valve body below the operating mechanism, the main lock is fixedly arranged on the operating mechanism, and the main lock comprises a lock body and a locking mechanism arranged on the lock body; a valve closing position locking mechanism is arranged on the locking matching piece corresponding to the closing position of the valve, and when the valve lock moves to the closing position of the valve along with the operating mechanism, the locking mechanism is controlled to be locked or unlocked with the valve closing position locking mechanism; the valve locking mechanism is characterized in that a valve opening position locking mechanism is arranged on the locking matching piece corresponding to the closing position of the valve, and when the valve lock moves to the opening position of the valve along with the operating mechanism, the locking mechanism is controlled to be locked or unlocked with the valve opening position locking mechanism.

2. The valve lock according to claim 1, wherein the valve open position locking mechanism and the valve closed position locking mechanism are locking holes respectively formed on the locking matching piece corresponding to the valve open position and the valve closed position; the locking mechanism comprises a lock cylinder, a lock pin and a lock bolt, the lock bolt is controlled to move between a locking position and an unlocking position, and the lower end of the lock bolt is matched with or separated from the locking hole; the lock bolt is provided with a locking position lock pin matching groove, and the lock pin is matched with or separated from the locking position lock pin matching groove under the control of the lock core to lock or release the lock bolt at the locking position.

3. The valve lock according to claim 2, wherein the lock bolt further defines an unlocking position lock pin engaging groove, and the lock pin is engaged with or disengaged from the unlocking position lock pin engaging groove under the control of the lock cylinder to lock or release the lock bolt at the unlocking position.

4. The valve latch according to claim 1, further comprising a first magnet and a second magnet disposed on the valve body or the latch mating member under the operating mechanism, wherein the first magnet and the second magnet are disposed at positions corresponding to or opposite to the valve open position latch mechanism and the valve closed position latch mechanism, respectively; the valve lock further comprises a first magnetic induction unit and a second magnetic induction unit, wherein the first magnetic induction unit and the second magnetic induction unit are arranged at the bottom of the lock body and are used for sensing the first magnet and the second magnet respectively.

5. The valve lock according to claim 4, further comprising a circuit board and a radio frequency chip, wherein the circuit board is provided with a state detection circuit, the state detection circuit comprises a logic switch module and at least two radio frequency chips, one end of each of the at least two radio frequency chips is connected to one selectable terminal of the logic switch module, and the other end of each radio frequency chip is grounded; the fixed wiring terminal of the logic switch module is connected with one end of the radio frequency antenna of the radio frequency chip, and the other end of the radio frequency antenna is grounded; and the respective induction signal output ends of the first magnetic induction unit and the second magnetic induction unit are respectively connected with one control signal input end of the logic switch module.

6. The valve lock according to claim 4, further comprising a circuit board and a radio frequency chip, wherein the circuit board is provided with a state detection circuit, the state detection circuit comprises at least two radio frequency chips, the magnetic induction unit is a magnetic induction switch, one end of each of the at least two radio frequency chips is connected to one end of the first magnetic induction unit and one end of the second magnetic induction unit, and the other end of each of the at least two radio frequency chips is grounded; the other ends of the first magnetic induction unit and the second magnetic induction unit are connected with one end of a radio frequency antenna of the radio frequency chip, and the other end of the radio frequency antenna is grounded.

7. The valve lock according to claim 5 or 6, wherein the main lock is provided with a circuit board assembly groove, and the circuit board is arranged in the circuit board assembly groove; the radio frequency chip is arranged at the front end of the lock cylinder.

8. The valve lock according to claim 1, wherein the locking mating member further comprises a valve stroke limiting post and a valve stroke limiting piece, the valve stroke limiting post is fixedly arranged on the locking mating member or the valve body below the operating mechanism, the valve stroke limiting piece is fixedly arranged on or integrally formed with the operating mechanism, and the valve stroke limiting post and the valve stroke limiting piece form interference to limit the rotation stroke of the operating mechanism.

9. A valve locking and controlling system comprises a valve body, an operating mechanism and a valve rod, wherein the valve rod is assembled in the valve body and is driven by the operating mechanism to control the opening and closing of the valve; the system is characterized in that the valve locking and controlling system comprises a parameter acquisition device, a management host, a computer key and a lockset; the acquisition end of the parameter acquisition device is arranged at a parameter acquisition position related to the process flow where the valve is positioned, and the parameter output end is connected with the parameter input end of the management host; the management host is in communication connection with the computer key; the computer key supplies power to the lock, is in communication connection with the lock and is matched with the mechanical unlocking of the lock; the lock adopts the valve lock of claims 5-8.