CN210950128U - Automatic valve opening and closing device for gas tightness detection of kitchen range - Google Patents
Automatic valve opening and closing device for gas tightness detection of kitchen range Download PDFInfo
- Publication number
- CN210950128U CN210950128U CN201921471743.1U CN201921471743U CN210950128U CN 210950128 U CN210950128 U CN 210950128U CN 201921471743 U CN201921471743 U CN 201921471743U CN 210950128 U CN210950128 U CN 210950128U
- Authority
- CN
- China
- Prior art keywords
- centering
- closing device
- floating
- jaw
- detecting
- 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.)
- Active
Links
- 238000001514 detection method Methods 0.000 title abstract description 22
- 238000010411 cooking Methods 0.000 claims abstract description 29
- 238000000034 method Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 11
- 230000009471 action Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Landscapes
- Mechanically-Actuated Valves (AREA)
Abstract
The utility model discloses an automatic opening and closing device of valve for cooking utensils gas tightness detects, including drive assembly, centering subassembly, fixed plate, stand and the detection platform that is used for placing cooking utensils, the one end of stand is fixed on detecting the platform, and the other end is connected with the fixed plate, and drive assembly sets up in the fixed plate below, and drive assembly is connected with the centering subassembly, carries out centering location and pushes down the rotation after centering subassembly downward movement contacts the knob on the cooking utensils, realizes opening of pneumatic valve, resets to initial condition after accomplishing the gas tightness detects. The utility model discloses a drive assembly drive centering subassembly reciprocates, after it moves down and contacts the knob, centering subassembly carries out automatic centering, drive assembly control centering subassembly rotation 90 afterwards, correspondingly the knob also rotates thereupon, the pneumatic valve is opened, after the gas tightness detects, centering subassembly moves up and resets to initial condition; because this structure can realize automatic centering, consequently can adapt to different air valve rod intervals.
Description
Technical Field
The utility model belongs to the technical field of gas utensil automated inspection, concretely relates to automatic opening of valve and closing device for cooking utensils gas tightness detects.
Background
At present, the online gas tightness detection of the kitchen range in the kitchen electric industry is basically manual detection, and workers can influence the accuracy of a detection result due to more active factors, so that the problem of low detection efficiency exists.
In order to solve the problem, manual detection needs to be upgraded into automatic detection, the automatic detection is adopted to replace the manual detection, the problem of automatic opening and closing of the gas valve of the stove in the detection process is solved, certain errors exist in processing and assembly of parts, and the adaptability of the device for automatically opening and closing the valve to different gas valve rod distances is solved if the gas valve center distance of the double-eye stove has errors so that the gas valve rod distances are inconsistent.
SUMMERY OF THE UTILITY MODEL
In order to solve at least one problem, the utility model provides an automatic closing device that opens of valve for cooking utensils gas tightness detects has solved because there is the error in the preparation of spare part and the assembling process, causes the position and the interval of two knobs of binocular cooking utensils to have the nonconformity, and the actuating mechanism of fixed center-to-center distance can't open and close the problem of pneumatic valve.
The utility model adopts the technical proposal that:
the utility model provides an automatic opening of valve and closing device for cooking utensils gas tightness detects, its includes drive assembly, centering subassembly, fixed plate, stand and is used for placing the detection platform of cooking utensils, the one end of stand is fixed on detecting the platform, and the other end is connected with the fixed plate, drive assembly sets up in the fixed plate below, drive assembly is connected with centering subassembly and drives it and reciprocate, centering subassembly moves down and carries out centering location and push down the rotation after contacting the knob on the cooking utensils, realizes opening of pneumatic valve, and the completion gas tightness detects the back and resets to initial condition.
Preferably, drive assembly is including the revolving cylinder, cylinder fixing base and the flexible cylinder of screw thread that have the rolling disc, the cylinder fixing base is fixed on the rolling disc, the flexible cylinder of screw thread inserts in the cylinder fixing base rather than the joint movement.
Preferably, the driving assembly further comprises a locking ring, and the locking ring is sleeved on the threaded telescopic cylinder and used for preventing the threaded telescopic cylinder from being loosened in motion.
Preferably, centering subassembly includes floating support, unsteady jack catch, cross-bar linkage and first spring, two relative faces of unsteady jack catch are through two cross-bar linkage and floating support fixed connection, two relative other faces of unsteady jack catch are through two cross-bar linkage and two first spring coupling, just first spring mounting is in floating support and between the jack catch that floats.
Preferably, the floating support is provided with elongated holes on two opposite faces, and circular holes on the other opposite faces.
Preferably, the floating clamping jaw comprises a body, a left clamping jaw and a right clamping jaw, wherein the left clamping jaw and the right clamping jaw are respectively positioned at the left side and the right side of the lower end of the body and form a splayed shape between the left clamping jaw and the right clamping jaw, and the left side and the right side are consistent with the directions of the other two opposite surfaces of the floating clamping jaw.
Preferably, threaded holes are formed in four faces of the body, and one end of the transverse connecting rod is a threaded end matched with the threaded holes.
Preferably, the drive assembly and the centering assembly are connected by a connecting assembly.
Preferably, coupling assembling includes that both ends all set up threaded connecting rod, second spring, gasket and nut, in the one end screw in cylinder fixing base of connecting rod, in the other end screw in floating support and stretch out outside the floating support, second spring, gasket and nut overlap in proper order and establish on the part that the floating support stretches out the floating support.
Preferably, the drive assembly and the centering assembly are both provided in two sets.
Compared with the prior art, the utility model discloses a drive assembly drive centering subassembly reciprocates, after it moves down and contacts the knob on the cooking utensils, centering subassembly carries out the automatic centering, and drive assembly control centering subassembly is rotatory 90 afterwards, and correspondingly the knob also rotates thereupon, and the pneumatic valve is opened, and after the gas tightness detects finishing, centering subassembly moves up and resets to initial condition; because the structure can realize automatic centering, the problems that the positions and the distances of two knobs of the double-hole cooker are inconsistent and a driving mechanism with fixed center distance cannot open and close the air valve due to errors in the manufacturing and assembling processes of parts are solved.
Drawings
FIG. 1 is a schematic structural view of an automatic valve opening and closing device for detecting the gas tightness of a cooking appliance according to an embodiment of the present invention;
FIG. 2 is an exploded view of an automatic valve opening and closing device for detecting the gas tightness of a cooking stove, according to an embodiment of the present invention;
FIG. 3 is an exploded view of a driving assembly of an automatic valve opening and closing device for detecting the gas tightness of a cooking appliance according to an embodiment of the present invention;
FIG. 4 is a schematic structural view of a driving assembly in an automatic valve opening and closing device for detecting the gas tightness of a cooking appliance according to an embodiment of the present invention;
FIG. 5 is an exploded view of a centering assembly of an automatic valve opening and closing device for detecting the gas tightness of a cooking stove, according to an embodiment of the present invention;
FIG. 6 is a schematic structural view of a floating bracket in an automatic valve opening and closing device for detecting the gas tightness of a cooking appliance according to an embodiment of the present invention;
FIG. 7 is a schematic structural view of a floating jaw in an automatic valve opening and closing device for detecting the gas tightness of a cooking utensil according to an embodiment of the present invention;
FIG. 8 is a schematic structural view of a transverse connecting rod in an automatic valve opening and closing device for detecting the gas tightness of a cooking utensil according to an embodiment of the present invention;
fig. 9 is an exploded view of the automatic valve opening and closing device for detecting the gas tightness of a cooking appliance, in which a driving assembly, a centering assembly and a connecting assembly are engaged;
fig. 10 is a schematic structural view of the automatic valve opening and closing device for detecting the gas tightness of a cooker, in which a driving assembly, a centering assembly and a connecting assembly are engaged;
fig. 11 is a cross-sectional view taken along the line a-a in fig. 10.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The embodiment of the utility model provides an automatic closing device that opens of valve for cooking utensils gas tightness detects, as shown in fig. 1-2, it includes drive assembly 1, centering subassembly 2, fixed plate 3, stand 4 and is used for placing the detection platform 5 of cooking utensils, wherein:
one end of the upright post 4 is fixed on the detection table 5, the other end of the upright post is connected with the fixed plate 3, the driving component 1 is arranged below the fixed plate 3, the driving component 1 is connected with the centering component 2 and drives the centering component to move up and down, the centering component 2 moves downwards to contact with a knob on a stove and then performs centering positioning and downward pressing rotation, the opening of an air valve is realized, and the air valve is reset to an initial state after air tightness detection is completed;
thus, by adopting the structure, the drive component 1 drives the centering component 2 to move up and down, after the centering component 2 moves downwards to contact with a knob on the stove, the centering component 2 automatically centers, then the drive component 1 controls the centering component 2 to rotate 90 degrees, correspondingly, the knob also rotates along with the knob, the air valve is opened, and after the air tightness detection is finished, the centering component 2 moves upwards and resets to an initial state; because the centering component 2 can realize automatic centering, the structure in the embodiment can adapt to different valve rod distances of the air valve.
As shown in fig. 3-4, the driving assembly 1 includes a rotary cylinder 11 with a rotary disc 14, a cylinder fixing seat 12, a thread telescopic cylinder 13 and a locking ring 15, the cylinder fixing seat 12 is fixed on the rotary disc 14, the thread telescopic cylinder 13 is inserted into the cylinder fixing seat 12 to move together with the same, and the locking ring 15 is sleeved on the thread telescopic cylinder 13 to prevent the same from being loosened during movement;
like this, when letting in compressed air, the piston rod of screw thread telescopic cylinder 13 stretches out the motion downwards along the axis, and the piston rod resets after stopping letting in compressed air, and when revolving cylinder 11 connects compressed air, revolving disc 14 of revolving cylinder 11 can rotate around the central axis clockwise or anticlockwise, and revolving cylinder 11 drives cylinder fixing base 12 rotatory, and cylinder fixing base 12 drives centering subassembly 2 rotatory.
The assembly process of the drive assembly 1 is as follows:
As shown in fig. 5-8, the centering assembly 2 includes a floating bracket 21, a floating jaw 22, two opposite surfaces of the floating jaw 22 are fixedly connected with the floating bracket 21 through two of the cross links 23, two opposite surfaces of the floating jaw 22 are connected with two of the first springs 24 through two of the cross links 23, and the first springs 24 are installed between the floating bracket 21 and the floating jaw 22;
two opposite surfaces of the floating support 21 are provided with strip holes 211, and the other two opposite surfaces are provided with circular holes 212; the floating jaw 22 comprises a body 221, a left jaw 222 and a right jaw 223, the left jaw 222 and the right jaw 223 are respectively positioned on the left side and the right side of the lower end of the body 221, a splayed shape is formed between the left jaw and the right jaw, and the left side and the right side have the same direction with the other two opposite surfaces of the floating jaw 22; threaded holes 224 are formed in four surfaces of the body 221, and one end of the transverse connecting rod 23 is a threaded end 231 matched with the threaded holes 224;
thus, when the splayed floating jaw 22 is forced leftwards or rightwards, the floating jaw 22 moves leftwards or rightwards, the left first spring 24 or the right first spring 24 is compressed, the two transverse connecting rods 23 arranged in front and at the back move leftwards or rightwards along with the floating jaw 22 in the long hole 211 of the floating bracket 21, and when the external force of the floating jaw 22 disappears, the floating jaw 22 is reset under the action of the resilience force of the first spring 24.
The assembly process of the centering assembly 2 is as follows:
threaded holes 224 are formed in four surfaces of the body 221 of the floating clamping jaw 22, the front transverse connecting rod 23 and the rear transverse connecting rod 23 penetrate through the long holes 211 in the front side surface and the rear side surface of the floating support 21 respectively, and threaded ends 231 are screwed into the threaded holes 224 in the front side surface and the rear side surface of the floating clamping jaw 22 respectively and locked; the left and right transverse connecting rods 23 respectively penetrate through the circular holes 212 on the left and right sides of the floating support 21, the two first springs 24 are respectively sleeved on the left and right transverse connecting rods 23, the first springs 24 are required to be installed between the floating support 21 and the floating clamping jaws 22, and the threaded ends 231 of the left and right transverse connecting rods 23 are respectively screwed into the threaded holes 224 on the left and right sides of the body 221 and locked;
the left and right sides and the front and rear sides are in the directions shown in the drawings.
As shown in fig. 9, the driving assembly 1 and the centering assembly 2 are connected by a connecting assembly 6.
The connecting assembly 6 comprises a connecting rod 61, a second spring 62, a gasket 63 and a nut 64, wherein threads are arranged at two ends of the connecting rod 61, one end of the connecting rod 61 is screwed into the cylinder fixing seat 12, the other end of the connecting rod is screwed into the floating support 21 and extends out of the floating support 21, and the second spring 62, the gasket 63 and the nut 64 are sequentially sleeved on the part of the floating support 21 extending out of the floating support 21;
in this way, the connection assembly 6 completes the connection assembly of the driving assembly 1 and the centering assembly 2, so that the driving assembly and the centering assembly cooperate with each other to realize the automatic opening and closing of the valve.
In order that the device can also be applied to a double-eye cooker, the driving component 1 and the centering component 2 are provided with two groups.
And (3) air tightness detection process:
ventilating the kitchen range: the knob is pressed down and is loosened after rotating 90 degrees anticlockwise, air tightness detection is carried out at the moment, and the air valve is closed after the detection is finished and is rotated 90 degrees clockwise.
It is worth noting that: when the device is used for closing and opening the air valve of the double-hole stove, the two sets of driving components 1 and the centering components 2 act simultaneously, and the operation process can be realized only by aligning the rotation center line of the driving components with the shaft center line of the knob (valve rod). Errors exist in the manufacturing and assembling processes of parts, so that the positions and the distances of the knobs are inconsistent, and if the center distances of the two pairs of middle assemblies are fixed, the purpose of simultaneously operating the two air valves to open or close cannot be realized.
The specific process of opening and closing the air valve (knob) is as follows:
as shown in fig. 9-11, the piston rod of the threaded telescopic cylinder 13 moves downward under the action of compressed air, the centering assembly 2 is pushed by the piston rod to move downward, after the splayed floating jaw 22 contacts the knob, the splayed floating jaw 22 receives the transverse reaction force of the knob in the process of continuing to move downward, the floating jaw 22 moves transversely (moves leftwards or rightwards) to automatically center with the knob, the piston rod continues to move downward, the top of the floating jaw 22 contacts with the upper top surface of the knob and continues to move downward, and the knob is pressed downward to move the valve rod of the air valve downward; when the valve rod is pressed to the lower dead point of the valve rod, the downward movement of the piston rod is stopped, the rotary cylinder 11 starts to rotate 90 degrees in the anticlockwise direction, the connecting rod 61 is driven by the cylinder fixing seat 12 to rotate anticlockwise around the central axis of the rotary disc 14, the centering assembly 2 rotates anticlockwise around the central axis under the driving of the connecting rod 61, the splayed floating clamping jaw 22 drives the knob to rotate, and the valve rod of the air valve rotates 90 degrees;
when the floating jaw 22 moves down, the centering assembly 22 moves down integrally and compresses the second spring 62, the floating jaw 22 moves laterally (moves left or right), the left first spring 24 or the right first spring 24 is compressed, and the front and rear cross links 23 move left or right in the elongated hole 211 of the floating bracket 21 along with the floating jaw 22.
When the air tightness detection is finished, the threaded telescopic cylinder 13 resets, the piston rod moves upwards, and the centering assembly 2 moves upwards to reset under the action of the resilience force of the second spring 62;
when the centering assembly 2 moves upwards, the knob is separated from the floating jaw 22, the reaction force of the knob on the floating jaw 22 disappears, and the floating jaw 22 is transversely reset to an initial state (reset to the right or left) under the action of the resilience force of the first spring 24; meanwhile, the rotary cylinder 11 rotates clockwise by 90 degrees under the action of compressed air force to reset, and returns to the initial state.
In the embodiment, the centering component is driven by the driving component to move up and down, after the centering component moves down and contacts with the knob on the stove, the centering component automatically centers, then the driving component controls the centering component to rotate by 90 degrees, correspondingly, the knob also rotates along with the knob, the air valve is opened, and after the airtightness detection is finished, the centering component moves up and resets to an initial state; because the structure can realize automatic centering, the problems that the positions and the distances of two knobs of the double-hole cooker are inconsistent and a driving mechanism with fixed center distance cannot open and close the air valve due to errors in the manufacturing and assembling processes of parts are solved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides an automatic opening of valve and closing device for cooking utensils gas tightness detects, its characterized in that, it includes drive assembly (1), centering subassembly (2), fixed plate (3), stand (4) and is used for placing the kitchen utensils examine test table (5), the one end of stand (4) is fixed on examining test table (5), and the other end is connected with fixed plate (3), drive assembly (1) sets up in fixed plate (3) below, drive assembly (1) is connected and drives it and reciprocate with centering subassembly (2), centering subassembly (2) move down and carry out centering location and push down the rotation after contacting the knob on the kitchen utensils, realize opening of pneumatic valve, reset to initial condition after accomplishing the gas tightness and detecting.
2. The automatic valve opening and closing device for detecting the gas tightness of a kitchen range as claimed in claim 1, wherein said driving assembly (1) comprises a rotary cylinder (11) with a rotary disc (14), a cylinder fixing seat (12) and a thread telescopic cylinder (13), said cylinder fixing seat (12) is fixed on the rotary disc (14), and said thread telescopic cylinder (13) is inserted into the cylinder fixing seat (12) to move together with the same.
3. The automatic valve opening and closing device for detecting the gas tightness of a cooking utensil according to claim 2, characterized in that the driving assembly (1) further comprises a locking ring (15), and the locking ring (15) is sleeved on the threaded telescopic cylinder (13) for preventing the locking ring from loosening in movement.
4. The automatic valve opening and closing device for detecting the airtightness of a cooking utensil according to any one of claims 1 to 3, wherein the centering assembly (2) comprises a floating support (21), a floating jaw (22), two opposite surfaces of the floating jaw (22) are fixedly connected with the floating support (21) through the two cross links (23), the other two opposite surfaces of the floating jaw (22) are connected with the two first springs (24) through the two cross links (23), and the first springs (24) are installed between the floating support (21) and the floating jaw (22).
5. The automatic valve opening and closing device for detecting the airtightness of a cooking utensil according to claim 4, wherein the floating support (21) is provided with elongated holes (211) on two opposite faces and circular holes (212) on the other two opposite faces.
6. The automatic valve opening and closing device for detecting the airtightness of a cooking utensil according to claim 5, wherein the floating jaw (22) comprises a body (221), a left jaw (222) and a right jaw (223), the left jaw (222) and the right jaw (223) are respectively located on the left side and the right side of the lower end of the body (221) and form a splayed shape therebetween, and the left side and the right side are in the same direction with the other two opposite surfaces of the floating jaw (22).
7. The automatic valve opening and closing device for detecting the airtightness of a cooking utensil according to claim 6, wherein threaded holes (224) are provided on four faces of the body (221), and one end of the cross link (23) is a threaded end (231) matched with the threaded holes (224).
8. The automatic valve opening and closing device for detecting the airtightness of a cooking utensil according to claim 4, wherein the driving assembly (1) and the centering assembly (2) are connected through a connecting assembly (6).
9. The automatic valve opening and closing device for detecting the airtightness of the cooker according to claim 8, wherein the connecting assembly (6) comprises a connecting rod (61), a second spring (62), a gasket (63) and a nut (64), wherein threads are arranged at two ends of the connecting rod (61), one end of the connecting rod (61) is screwed into the cylinder fixing seat (12), the other end of the connecting rod is screwed into the floating support (21) and extends out of the floating support (21), and the second spring (62), the gasket (63) and the nut (64) are sequentially sleeved on the portion, extending out of the floating support (21), of the floating support (21).
10. The automatic valve opening and closing device for detecting the airtightness of a cooking utensil according to claim 1, wherein the driving assembly (1) and the centering assembly (2) are provided in two groups.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921471743.1U CN210950128U (en) | 2019-09-05 | 2019-09-05 | Automatic valve opening and closing device for gas tightness detection of kitchen range |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921471743.1U CN210950128U (en) | 2019-09-05 | 2019-09-05 | Automatic valve opening and closing device for gas tightness detection of kitchen range |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210950128U true CN210950128U (en) | 2020-07-07 |
Family
ID=71379879
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921471743.1U Active CN210950128U (en) | 2019-09-05 | 2019-09-05 | Automatic valve opening and closing device for gas tightness detection of kitchen range |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210950128U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110566714A (en) * | 2019-09-05 | 2019-12-13 | 华帝股份有限公司 | Automatic valve opening and closing device for gas tightness detection of kitchen range |
-
2019
- 2019-09-05 CN CN201921471743.1U patent/CN210950128U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110566714A (en) * | 2019-09-05 | 2019-12-13 | 华帝股份有限公司 | Automatic valve opening and closing device for gas tightness detection of kitchen range |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110160759B (en) | Novel clamping device for knob test | |
| CN210950128U (en) | Automatic valve opening and closing device for gas tightness detection of kitchen range | |
| CN100428906C (en) | Electric pressure cooker pressure converting device | |
| CN208751967U (en) | A kind of metal material abrasion resistance tester | |
| CN108844843A (en) | A kind of metal material abrasion resistance tester and its application method | |
| CN110091171B (en) | Oil seal assembly mounting device of air spring piston rod assembly | |
| US4096968A (en) | Door mounting and actuator for a pressure vessel | |
| CN115184006B (en) | Valve fatigue test device | |
| CN115389112A (en) | Leakproofness detection device is used in valve production | |
| CN108706361A (en) | Container cage knob clamp device and its application method | |
| CN110566714A (en) | Automatic valve opening and closing device for gas tightness detection of kitchen range | |
| CN107956328B (en) | Lock catch mechanism, lock body and application of lock catch mechanism and lock body in kitchen equipment | |
| CN209050377U (en) | Steering wheel screw tightening and switch conduction all-in-one machine | |
| CN208761718U (en) | Container cage knob clamp device | |
| CN209239438U (en) | A kind of equipment for assembling clutch and drive disk | |
| CN212020508U (en) | A centre gripping anchor clamps for pipeline detects | |
| CN212421342U (en) | Novel adjustable sucker jig | |
| CN208906233U (en) | A kind of horizontal double benders | |
| CN210282323U (en) | Two-position linkage clamping jaw | |
| CN220296927U (en) | Pot clamp | |
| CN109317960A (en) | Steering wheel screw tightening and switch conduction all-in-one machine | |
| CN108087396B (en) | Quick positioning and clamping ball locking device | |
| CN115307843B (en) | Plug valve sealing performance pressure testing device | |
| CN214841003U (en) | Automatic switch device for gas valve of gas stove | |
| CN214222173U (en) | Stroke control mechanism of valve electric device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |