CN217819094U - Pressurizer cylinder temperature detection device and pressurizer - Google Patents
Pressurizer cylinder temperature detection device and pressurizer Download PDFInfo
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- CN217819094U CN217819094U CN202221531203.XU CN202221531203U CN217819094U CN 217819094 U CN217819094 U CN 217819094U CN 202221531203 U CN202221531203 U CN 202221531203U CN 217819094 U CN217819094 U CN 217819094U
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Abstract
The utility model provides a presser cylinder temperature-detecting device and presser belongs to coal gas compression equipment technical field, cylinder temperature-detecting device includes two sets of temperature detect component, control panel and alarm component, two sets of temperature detect component are connected respectively in two outer walls of cylinders, control panel all with two sets of temperature detect component electric connection and be used for receiving the temperature value that detects, the last cylinder temperature threshold value that has preset numerical value adjustable (can set up to 130 ℃) of control panel, alarm component electric connection control panel, if the temperature value that control panel received is greater than when cylinder temperature threshold value, control panel instructs alarm component to send alarm signal. The pressurizer comprises a pressurizer body and the cylinder temperature detection device. The utility model provides a pressurizer cylinder temperature-detecting device and pressurizer can in time report to the police when realizing cylinder temperature superelevation, can in time remind the operation personnel to discover various situations, avoids causing the technological effect of loss.
Description
Technical Field
The utility model belongs to the technical field of gas compression equipment, more specifically say, relate to a pressurizer cylinder temperature-detecting device and pressurizer.
Background
At present, combustible gases such as blast furnace gas, coke oven gas, converter gas, natural gas and the like in smelting enterprises are used as energy media and play a vital role, and the combustible gases can be pressurized to a certain pressure through a pressurizing machine to be transported through a long-distance pipeline. In a gas operation area, a gas compressor matched with a coke oven gas cabinet used at present comprises two stages of pressurizing devices, wherein a transverse cylinder and a vertical cylinder are respectively arranged to form two cylinders, the pressurizing is carried out in two times, a one-way air inlet valve is arranged on the wall of each cylinder, and the operating temperature is normally about 100 ℃. If the one-way valve is in failure and the temperature is over high (more than 130 ℃), operators cannot find the failure in time, and larger loss or gas leakage is caused.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a pressurizer cylinder temperature-detecting device and pressurizer can in time report to the police when aiming at realizing the cylinder temperature superelevation, reminds the operating personnel in time to discover, avoids causing the technological effect of loss.
In order to achieve the above object, the utility model adopts the following technical scheme: provided is a pressurizer cylinder temperature detection device, including:
two groups of temperature detection assemblies are respectively connected to the outer walls of the two cylinders;
the control panel is electrically connected with the two groups of temperature detection assemblies and used for receiving the detected temperature values, and the control panel is preset with a cylinder temperature threshold value with an adjustable numerical value;
the alarm assembly is electrically connected with the control panel and is suitable for sending an alarm signal;
if the temperature value received by the control panel is larger than the temperature threshold value of the air cylinder, the control panel indicates the alarm assembly to send out an alarm signal.
In a possible implementation manner, the control panel is provided with a display screen, a temperature adjusting button and a first wireless communication module, the display screen is used for displaying the detected cylinder temperature value, the temperature adjusting button is used for adjusting the cylinder temperature threshold value, and the first wireless communication module is used for transmitting and receiving wireless remote communication signals.
In a possible implementation manner, the pressurizer cylinder temperature detecting device further comprises a mobile terminal with a second wireless communication module, the second wireless communication module is suitable for being in wireless communication connection with the first wireless communication module, and the mobile terminal is provided with a display module and is used for synchronously displaying the cylinder temperature value with the display screen.
In one possible implementation, the mobile terminal has an alarm module adapted to emit an alarm signal in synchronism with the alarm component.
In a possible implementation manner, the temperature detection assembly comprises a magnetic type temperature sensor, and the magnetic type temperature sensor is tightly attached to the outer wall of the cylinder and used for detecting the temperature of the cylinder.
In a possible implementation mode, the outer wall of the air cylinder can be detachably connected with a fixed cover, a mounting hole is formed in the middle of the fixed cover, the temperature detection assembly is arranged in the fixed cover, a wiring harness penetrates through the mounting hole, a first sealing ring is arranged at the joint of the fixed cover and the outer wall of the air cylinder, and an elastic piece used for elastically pushing the temperature detection assembly to move towards the direction of the air cylinder is arranged on the inner side wall of the fixed cover.
In a possible implementation manner, the cylinder wall is provided with a through hole which is communicated with the inside of the cylinder, the temperature detection assembly comprises a temperature sensor, an anti-slip sleeve is slidably sleeved on the outer circumference of the temperature sensor, the anti-slip sleeve is inserted into the through hole and is in sealing connection with the through hole, and one end, used for detecting temperature, of the temperature sensor is arranged in the cylinder.
In a possible implementation manner, the outer wall of the anti-slip sleeve is provided with an external thread, the inner wall of the through hole is provided with an internal thread, the anti-slip sleeve is in threaded connection with the through hole, and the temperature sensor has a degree of freedom of movement in the anti-slip sleeve along the radial direction of the cylinder.
In a possible implementation manner, one end of the anti-slip sleeve, which is far away from the cylinder, is provided with a top cap, one side surface of the top cap, which is close to the cylinder, is provided with a second sealing ring, and the second sealing ring is used for sealing a gap between the top cap and the outer wall of the cylinder.
The utility model provides a pressurizer cylinder temperature-detecting device's beneficial effect lies in: compared with the prior art, the utility model discloses presser cylinder temperature-detecting device includes two sets of temperature detect component, control panel and alarm component, two sets of temperature detect component are connected respectively in two outer walls of cylinder, control panel all with two sets of temperature detect component electric connection and be used for receiving the temperature value that detects, the last cylinder temperature threshold value that has preset numerical value adjustable (can set up to 130 ℃), alarm component electric connection control panel, if the temperature value that control panel received is greater than when cylinder temperature threshold value, control panel instructs alarm component to send alarm signal, the realization detects the cylinder temperature, can in time report to the police when the cylinder temperature is superelevation, can in time remind operating personnel to discover various situations, avoid causing the technological effect of loss.
The utility model also provides a pressure machine, pressure machine include the pressure machine body and connect in on the pressure machine body pressure machine cylinder temperature-detecting device.
The utility model provides a pressurizer's beneficial effect lies in: compared with the prior art, the utility model discloses the presser has and can detect and the early warning to cylinder temperature, has played and can in time remind the operation personnel to discover various situations, avoids causing the loss, prevents the technological effect of presser trouble.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions 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 it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural view of a cylinder temperature detection device of a press according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a temperature detection assembly of the pressurizer cylinder temperature detection device provided by the embodiment of the invention;
fig. 3 is a schematic structural view of a temperature detection assembly of a cylinder temperature detection device of a press according to another embodiment of the present invention;
fig. 4 is a schematic structural view of a temperature detection assembly of a cylinder temperature detection device of a press according to another embodiment of the present invention;
fig. 5 is a schematic structural view of a temperature detecting assembly of the cylinder temperature detecting device of the pressing machine according to another embodiment of the present invention.
Description of the reference numerals:
1. a temperature detection assembly; 11. a wire harness; 2. a control panel; 3. an alarm component; 4. a cylinder; 41. a through hole; 5. a mobile terminal; 6. a fixed cover; 61. mounting holes; 7. a first seal ring; 8. an elastic member; 9. an anti-slip sleeve; 10. a top cap; 110. and a second seal ring.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Referring to fig. 1 to 5, the cylinder temperature detecting device of a press machine and the press machine provided by the present invention will now be described. The cylinder temperature detection device of the pressurizer comprises two groups of temperature detection assemblies 1, a control panel 2 and an alarm assembly 3, wherein the two groups of temperature detection assemblies 1 are respectively connected to the outer walls of two cylinders 4; the control panel 2 is electrically connected with the two groups of temperature detection assemblies 1 and used for receiving detected temperature values, and a cylinder temperature threshold value with an adjustable numerical value is preset on the control panel 2; the alarm component 3 is electrically connected with the control panel 2 and is suitable for sending out an alarm signal; if the temperature value received by the control panel 2 is greater than the temperature threshold value of the air cylinder, the control panel 2 indicates the alarm component 3 to send out an alarm signal.
The utility model provides a presser cylinder temperature-detecting device and presser, compared with the prior art, two sets of temperature detect component 1 are connected respectively in two cylinders 4 outer walls, control panel 2 all with two sets of temperature detect component 1 electric connection and be used for receiving the temperature value that detects, numerical value adjustable cylinder temperature threshold value (can set up to 130 ℃) is preset on control panel 2, 3 electric connection control panel of alarm component 2, when the temperature value that if control panel 2 received is greater than cylinder temperature threshold value, control panel 2 instructs alarm component 3 to send alarm signal, the realization is to cylinder 4 temperature detection, can in time report to the police when cylinder 4 temperature is superelevation, can in time remind the operation personnel to discover various situations, avoid causing the technological effect of loss.
The cylinder temperature threshold value can be set to a reasonable value, because the operating temperature of the cylinder 4 is normally about 100 ℃, the set cylinder 4 temperature threshold value is larger than 100 ℃, and can be usually set to 130 ℃, or can be adjusted at about 130 ℃, when the one-way valve is in failure and the temperature is ultrahigh (larger than 130 ℃), an operator can be reminded of finding the failure, and the phenomenon of larger loss or gas leakage is avoided. When the temperature of the cylinder 4 is lower than 130 ℃, the alarm is not given, and when the temperature of the cylinder 4 is higher than 130 ℃, the alarm is given to remind operators in time. The alarm component 3 is an audible and visual alarm or a buzzer or a loudspeaker and the like.
In some embodiments, referring to fig. 1, the control panel 2 has a display screen for displaying the detected temperature value of the cylinder 4, a temperature adjustment button for adjusting a cylinder temperature threshold, and a first wireless communication module for transmitting and receiving wireless remote communication signals. This control panel 2 can select common controller or treater etc. among the prior art to use, and built-in has PLC controller or control module etc. can set for cylinder temperature threshold value, can adjust through the temperature regulation button, can show 4 temperature value of current cylinder through the display screen, and this control panel 2 can also realize carrying out wireless communication with external communication tool etc. moreover.
In some embodiments, referring to fig. 1, the device for detecting the cylinder temperature of the press machine further includes a mobile terminal 5 having a second wireless communication module, the second wireless communication module is adapted to be in wireless communication with the first wireless communication module, and the mobile terminal 5 has a display module and is configured to display the cylinder 4 temperature value synchronously with the display screen. Wireless communication is connected between mobile terminal 5 and control panel 2, realizes can with control panel 2 synchronous display temperature value on mobile terminal 5, can watch 4 temperature values of cylinder at long-range at any time, makes things convenient for the operating personnel in time to master the temperature value, has avoided the operating personnel to be close to the drawback that control panel 2 could observe the temperature value.
Specifically, the display module is a part of the structure of the mobile terminal 5, and the mobile terminal 5 is a product in the prior art, such as a remote controller, a mobile phone or a tablet computer. The communication between the two groups of wireless communication modules can be carried out by adopting the communication modes of GPRS, 4G, 5G and the like in the prior art.
In order to implement the function of having an alarm on the mobile terminal 5 as well, in some embodiments, referring to fig. 1, the mobile terminal 5 has an alarm module adapted to send out an alarm signal in synchronization with the alarm component 3. The alarm module can be a part of the structure of the mobile terminal 5, such as a loudspeaker, and can send out an alarm signal simultaneously with the alarm component 3, and the alarm module can also be an alarm device attached to the mobile terminal 5, such as a buzzer.
In order to detect the temperature of the cylinder 4, in some embodiments, referring to fig. 2, the temperature detecting assembly 1 includes a magnetic temperature sensor attached to an outer wall of the cylinder 4 and configured to detect the temperature of the cylinder 4. Magnetic-type temperature sensor can detect or survey or measure 4 outer wall temperatures of cylinder because cylinder 4 is the metal finished piece, may have the condition that 4 inside temperatures of cylinder are higher than the outside temperature, and inside temperature and outside temperature have the difference, but through rationally setting up cylinder temperature threshold value, on the basis of detecting 4 outer wall temperatures of cylinder, can command 4 inside temperatures of cylinder to control 4 operating temperature of cylinder.
The temperature of the cylinder 4 mentioned above mainly refers to the temperature of the outer wall of the cylinder 4, and can be estimated from the outside temperature when the temperature inside the cylinder 4 needs to be controlled.
In order to prevent the magnetic temperature sensor from falling off from the outer wall of the cylinder 4, in some embodiments, please refer to fig. 2, a fixing cover 6 is detachably connected to the outer wall of the cylinder 4, a mounting hole 61 is formed in the middle of the fixing cover 6, the temperature detection assembly 1 is arranged in the fixing cover 6, the wire harness 11 passes through the mounting hole 61, a first sealing ring 7 is arranged at the joint of the fixing cover 6 and the outer wall of the cylinder 4, and an elastic member 8 used for elastically pushing the temperature detection assembly 1 to move towards the direction of the cylinder 4 is arranged on the inner side wall of the fixing cover 6. Can increase sealing performance between fixed cover 6 and the cylinder 4 outer wall through setting up first sealing washer 7, fixed cover 6 can prevent that magnetism from inhaling formula temperature sensor and cylinder 4 outer wall and break away from, makes its state that keeps hugging closely with cylinder 4 outer wall throughout, and then but real-time detection cylinder 4 temperature value.
The fixed cover 6 is in a cylindrical structure with the upper end closed and the lower end opened, and the shape of the lower end face is matched with the shape of the cylinder 4, namely, the fixed cover 6 can be tightly attached to the outer wall of the cylinder 4.
Specifically, the wire harness 11 is connected to a magnetic-type temperature sensor, signal transmission is achieved through the wire harness 11, and the mounting hole 61 is hermetically connected to the wire harness 11. The fixed cover 6 can be dismantled with the outer wall of cylinder 4 through a plurality of bolts or screws that pass fixed cover 6 and be connected, is equipped with the screw on the outer wall of cylinder 4, but the inner spiro union of bolt or screw is in the screw, realizes fixed cover 6 and the fixed of the outer wall of cylinder 4. In the figure, the elastic part 8 is a plurality of springs which are uniformly distributed on the top of the inner side of the fixed cover 6, the springs are arranged at intervals, and at least one spring can elastically push the temperature detection assembly 1 to enable the temperature detection assembly to be tightly attached to the outer wall of the cylinder 4 and accurately detect the temperature of the cylinder 4.
The space enclosed between the fixed cover 6 and the outer wall of the cylinder 4 is large, and the temperature detection assembly 1 can be accommodated in the space.
In some embodiments, referring to fig. 1 to 5, a through hole 41 penetrating through the cylinder 4 is formed in the wall of the cylinder 4, the temperature detection assembly 1 includes a temperature sensor, an anti-slip sleeve 9 is slidably sleeved on an outer circumference of the temperature sensor, the anti-slip sleeve 9 is inserted into the through hole 41 and is hermetically connected with the through hole 41, and an end of the temperature sensor used for detecting the temperature is disposed inside the cylinder 4. This embodiment is also applicable to the case where the outer wall of the cylinder 4 has the through hole 41, and the temperature sensor is in a state of being inserted into the interior of the cylinder 4, so that the temperature inside the cylinder 4 can be detected. It should be noted that the temperature sensor does not affect the normal operation of the cylinder 4, and the connection manner of the temperature sensor and the cylinder 4, such as the connection manner of the one-way intake valve and the cylinder wall of the cylinder 4, but it is to be ensured that the temperature sensor and the cylinder 4 are in sealed connection, and no air leakage or the like occurs. The temperature sensor has the same function as a magnetic-type temperature sensor, and is two different embodiments. The outer wall of the anti-skid sleeve 9 can be provided with an anti-skid structure or the outer wall is made of anti-skid materials.
The temperature sensor used in the embodiment is of a columnar structure, and is firstly inserted into the anti-slip sleeve 9 in a sliding manner, and then the anti-slip sleeve 9 is inserted into the through hole 41, so that the temperature inside the cylinder 4 can be detected.
As shown in fig. 5, in order to further prevent the temperature sensor from falling from the through hole 41 and ensure that the gas inside the cylinder 4 does not leak to the outside air, the fixing cover 6 is used on the outer wall of the cylinder 4, the temperature sensor or the wire harness 11 passes through the mounting hole 61 on the fixing cover 6 and is connected in a sealing manner, and the first sealing ring 7 is connected with the outer wall of the cylinder 4 in a sealing manner, so that the gas inside the cylinder 4 can be prevented from leaking (possibly leaking into the fixing cover 6 but not leaking to the outside of the fixing cover 6). The inside of the fixed cover 6 forms a sealed space, thereby ensuring that gas does not leak.
In order to achieve convenient connection between the anti-slip sleeve 9 and the through hole 41 without losing the sealing effect, in some embodiments, please refer to fig. 1 to 5, an outer wall of the anti-slip sleeve 9 is provided with an external thread, an inner wall of the through hole 41 is provided with an internal thread, the anti-slip sleeve 9 is screwed with the through hole 41, and the temperature sensor has a degree of freedom of moving in a radial direction of the cylinder 4 in the anti-slip sleeve 9. After clockwise screwing, the anti-skid sleeve 9 can be sleeved into the through hole 41, otherwise, the anti-skid sleeve 9 can be taken out from the through hole 41 by anticlockwise screwing, the connection mode is simpler, and the installation and disassembly operations are more convenient and faster. When the screw connection cannot achieve the sealing effect, sealing cotton or a raw adhesive tape and the like can be arranged in the through hole 41, and the sealing effect can be achieved in the screw connection process.
Specifically, temperature sensor can be taken out in antiskid sleeve 9 and inserted the slip, but also can be spacing, is equipped with staple bolt or screw that is used for spacing temperature sensor to remove in antiskid sleeve 9's outer end, can fix into an organic whole with temperature sensor and antiskid sleeve 9 through staple bolt or screw, prevents that temperature sensor from taking place to remove in the temperature detect process, influences detection precision etc..
In order to enhance the sealing effect between the anti-slip sleeve 9 and the outer wall of the cylinder 4, in some embodiments, please refer to fig. 1 to 5, an end of the anti-slip sleeve 9 away from the cylinder 4 is provided with a top cap 10, a side surface of the top cap 10 close to the cylinder 4 is provided with a second sealing ring 110, and the second sealing ring 110 is used for sealing a gap between the top cap 10 and the outer wall of the cylinder 4. In the process of screwing the antiskid sleeve 9, the top cap 10 is gradually close to the outer wall of the cylinder 4, and then the second sealing ring 110 is gradually compressed, and simultaneously, a better sealing effect is gradually achieved. The threaded connection cooperates with the sealing of the second seal ring 110 to achieve a two-stage sealing effect. The top cap 10 is arranged in a circular ring shape, the lower end of the top cap is fixedly connected with the upper end of the anti-skidding sleeve 9, the temperature sensor can penetrate through the top cap 10, and the top cap 10, the anti-skidding sleeve 9 and the temperature sensor are coaxially arranged.
The temperature sensors in fig. 2, 3 and 4 have different profiles, i.e. differently profiled temperature sensors are illustrated, which are all temperature sensors.
The utility model also provides a pressure machine, pressure machine including add the press body and connect in add on the press body add press cylinder temperature-detecting device.
The utility model provides a pressure machine has adopted pressure machine cylinder temperature-detecting device, has and can in time remind the operation personnel to discover various situations to cylinder 4 temperature detection and early warning, avoids causing the loss, prevents the technological effect of pressure machine trouble.
Specifically, the pressurizer body adopts the pressurizer in the prior art, and the pressurizer cylinder temperature detection device adds a new function to the original pressurizer and can achieve a good technical effect.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. Pressurizer cylinder temperature-detecting device, its characterized in that includes:
two groups of temperature detection assemblies are respectively connected to the outer walls of the two cylinders;
the control panel is electrically connected with the two groups of temperature detection assemblies and used for receiving the detected temperature values, and the control panel is preset with a cylinder temperature threshold value with an adjustable numerical value;
the alarm component is electrically connected with the control panel and is suitable for sending an alarm signal;
if the temperature value received by the control panel is larger than the temperature threshold value of the air cylinder, the control panel indicates the alarm assembly to send out an alarm signal.
2. The apparatus as claimed in claim 1, wherein the control panel comprises a display screen for displaying the detected cylinder temperature, a temperature adjustment button for adjusting the cylinder temperature threshold, and a first wireless communication module for transmitting and receiving wireless remote communication signals.
3. The apparatus as claimed in claim 2, further comprising a mobile terminal having a second wireless communication module adapted to be wirelessly connected to the first wireless communication module, wherein the mobile terminal has a display module for displaying the cylinder temperature value synchronously with the display screen.
4. The apparatus for detecting the cylinder temperature of a press according to claim 3, wherein said mobile terminal has an alarm module adapted to emit an alarm signal in synchronism with said alarm assembly.
5. The apparatus for detecting the cylinder temperature of a press machine as claimed in claim 1, wherein said temperature detecting means includes a magnetic type temperature sensor which is closely attached to the outer wall of the cylinder and detects the cylinder temperature.
6. The cylinder temperature detecting device for the pressing machine as claimed in claim 5, wherein a fixing cover is detachably connected to an outer wall of the cylinder, a mounting hole is formed in the middle of the fixing cover, the temperature detecting assembly is disposed in the fixing cover, the wire harness passes through the mounting hole, a first sealing ring is disposed at a joint of the fixing cover and the outer wall of the cylinder, and an elastic member for elastically pushing the temperature detecting assembly to move towards the cylinder is disposed on an inner side wall of the fixing cover.
7. The device for detecting the cylinder temperature of the pressurizing machine as claimed in claim 1, wherein the cylinder wall is provided with a through hole which is communicated with the inside of the cylinder, the temperature detection assembly comprises a temperature sensor, an anti-slip sleeve is slidably sleeved on the outer circumference of the temperature sensor, the anti-slip sleeve is inserted into the through hole and is in sealed connection with the through hole, and one end of the temperature sensor, which is used for detecting the temperature, is arranged inside the cylinder.
8. The apparatus for detecting the cylinder temperature of a pressing machine according to claim 7, wherein the outer wall of the anti-slip sleeve is provided with external threads, the inner wall of the through hole is provided with internal threads, the anti-slip sleeve is screwed with the through hole, and the temperature sensor has freedom of movement in the radial direction of the cylinder in the anti-slip sleeve.
9. The apparatus for detecting the temperature of a cylinder of a pressing machine according to claim 8, wherein an end of the anti-slip sleeve, which is away from the cylinder, is provided with a top cap, and a side surface of the top cap, which is close to the cylinder, is provided with a second sealing ring, and the second sealing ring is used for sealing a gap between the top cap and the outer wall of the cylinder.
10. A press comprising a press body, and a press cylinder temperature detection device according to any one of claims 1 to 9 attached to the press body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221531203.XU CN217819094U (en) | 2022-06-17 | 2022-06-17 | Pressurizer cylinder temperature detection device and pressurizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221531203.XU CN217819094U (en) | 2022-06-17 | 2022-06-17 | Pressurizer cylinder temperature detection device and pressurizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217819094U true CN217819094U (en) | 2022-11-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221531203.XU Active CN217819094U (en) | 2022-06-17 | 2022-06-17 | Pressurizer cylinder temperature detection device and pressurizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217819094U (en) |
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2022
- 2022-06-17 CN CN202221531203.XU patent/CN217819094U/en active Active
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