Alignment mechanism and alignment device

Abstract

The utility model discloses an alignment mechanism and an alignment device, which are used for automatically aligning a valve cover and a valve body of a pressure reducing valve, and comprise a mechanism base for accommodating the pressure reducing valve, a mechanism upper cover positioned above the mechanism base and a lifting component for driving the mechanism upper cover to move up and down. According to the alignment mechanism and the alignment device, the valve cover and the valve body of the pressure reducing valve can be automatically aligned, labor force is saved, working efficiency is improved, the operation level of workers is not depended any more, alignment standards are unified, and the alignment effect of the valve cover and the valve body is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of parts for assembling and aligning a pressure reducing valve, in particular to an aligning mechanism and an aligning device. Background Art

[0002] The pressure reducing valve includes a valve body and a valve cover. During the assembly process, the valve cover needs to be aligned with the valve body first, and then connected and fixed with self-tapping screws. If the valve cover and the valve body are not aligned in the center, the screw holes on the valve cover and the valve body will not be aligned, affecting the installation of the self-tapping screws.

[0003] In the prior art, the alignment of the valve cover and the valve body is completely done manually, which has low work efficiency. The alignment of the valve cover and the valve body depends entirely on the operating level of the workers, and it is difficult to ensure the alignment effect of the valve cover and the valve body.

[0004] In view of this, it is necessary to provide an alignment mechanism and an alignment device that can automatically align the valve cover and valve body of the pressure reducing valve. Utility Model Content

[0005] The utility model aims to overcome the deficiencies of the prior art and provide an alignment mechanism and an alignment device which can automatically align the valve cover and valve body of a pressure reducing valve, thereby improving work efficiency and enhancing the alignment effect of the valve cover and valve body.

[0006] The technical solution of the utility model provides an alignment mechanism, which is used for automatically aligning the valve cover and valve body of the pressure reducing valve, and comprises a mechanism base for accommodating the pressure reducing valve, a mechanism upper cover located above the mechanism base, and a lifting member for driving the mechanism upper cover to move up and down;

[0007] The mechanism base comprises a base body having a valve body placement groove and a valve body alignment unit capable of translationally moving relative to the base body;

[0008] The valve body alignment unit comprises a translation slide slidably mounted at the bottom of the valve body placement groove, at least one pair of positioning pins connected to the edge of the translation slide and arranged oppositely, and a valve body centering column connected to the middle of the translation slide and used to be inserted into the center hole of the valve body;

[0009] The upper end of the positioning pin extends above the base body, and the valve body centering column is located in the valve body placement groove;

[0010] The bottom of the mechanism upper cover is provided with at least one pair of positioning sleeves for correspondingly cooperating with at least one pair of positioning pins and a valve cover centering column for inserting into the center hole of the valve cover;

[0011] When the mechanism upper cover is in a descending state, the positioning pin is inserted into the positioning sleeve.

[0012] In one of the optional technical solutions, the base body includes a main body bottom plate and a main body frame connected to the main body bottom plate and surrounding the valve body placement groove;

[0013] The main frame includes a frame through hole for the positioning pin to pass through;

[0014] The translation slide is slidably mounted between the main body bottom plate and the main body frame, and the positioning pin passes through the frame through hole upward;

[0015] The valve body centering column passes through the bottom notch of the valve body placement groove and extends into the valve body placement groove.

[0016] In one of the optional technical solutions, the bottom of the main frame has a slide plate placement groove that is connected to the bottom notch, and the translational slide plate can be slidably assembled in the slide plate placement groove.

[0017] In one of the optional technical solutions, the valve body alignment unit includes a pair of positioning pins, and the pair of positioning pins are distributed on a diagonal line of the translation slide.

[0018] In one of the optional technical solutions, the upper end of the positioning pin has a tapered end portion.

[0019] In one of the optional technical solutions, the lower port of the positioning sleeve is a bell mouth.

[0020] In one of the optional technical solutions, the bottom of the mechanism upper cover is provided around the valve cover centering column with an auxiliary positioning piece for positioning with the screw hole on the valve cover.

[0021] In one of the optional technical solutions, the lifting member includes a pair of lifting elements and a lifting plate connected between the pair of lifting elements;

[0022] The mechanism upper cover is connected to the bottom of the lifting plate.

[0023] The technical solution of the utility model also provides an alignment device, comprising a plurality of alignment mechanisms as described in any of the previous technical solutions, wherein the plurality of alignment mechanisms are arranged in a front-to-back spacing.

[0024] In one of the optional technical solutions, the alignment device includes a device base, a transport track provided on the device base, and a carrying plate on the transport track;

[0025] A plurality of sets of lifting components are installed on the device base at intervals in front and back, a plurality of sets of mechanism upper covers are respectively connected with a plurality of sets of lifting components, and a plurality of sets of mechanism bases are installed on the bearing plate at intervals in front and back.

[0026] The above technical solution has the following beneficial effects:

[0027] The alignment mechanism and alignment device provided by the utility model are used to automatically align the valve cover and valve body of the pressure reducing valve. The valve body is placed in the valve body placement groove, the valve cover is placed on the valve body, the valve body centering column is inserted into the center hole of the valve body from the bottom, the lifting component is operated to lower the mechanism cover, the positioning pin is first inserted into the positioning sleeve, the positioning sleeve is radially fixed, if the positioning pin is offset, it will be affected by the positioning sleeve, the positioning pin drives the translation slide and the valve body centering column to translate, the valve body centering column drives the valve body to translate, until the positioning pin and the positioning sleeve are coaxial and then stop translating. The mechanism cover continues to move downward, the valve cover centering column is inserted into the center hole of the valve cover for a preset distance and then stops descending, at this time the valve cover is completely aligned with the valve body, and the screw holes on the valve cover and the valve body are completely aligned with the center. Then operate the lifting component to raise the mechanism cover, and screw the screw holes.

[0028] The alignment mechanism and the alignment device provided by the utility model can automatically align the valve cover and the valve body of the pressure reducing valve, saving labor, improving work efficiency, no longer relying on the operating level of workers, and the alignment standards are unified, which improves the alignment effect of the valve cover and the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The disclosure of the present invention will become easier to understand with reference to the accompanying drawings. It should be understood that these drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present invention. In the drawings:

[0030] Figure 1 A three-dimensional diagram of an alignment mechanism provided in one embodiment of the utility model;

[0031] Figure 2 A front view of the alignment mechanism provided by one embodiment of the utility model when the upper cover of the mechanism is in a raised state;

[0032] Figure 3 A front view of the alignment mechanism provided by one embodiment of the utility model when the upper cover of the mechanism is in a lowered state;

[0033] Figure 4 A three-dimensional diagram of the upper cover of the mechanism;

[0034] Figure 5 is a cross-sectional view of the positioning sleeve;

[0035] Figure 6 A three-dimensional diagram of the base of the mechanism;

[0036] Figure 7 This is an exploded view of the mechanism base;

[0037] Figure 8 A three-dimensional diagram of the main frame;

[0038] Fig. 9 A three-dimensional diagram of a slide plate placement slot provided at the bottom of the main frame;

[0039] Fig.10 This is an exploded view of the pressure reducing valve;

[0040] Fig.11 It is a bottom view of the valve body;

[0041] Fig.12 It is a schematic diagram of the pressure reducing valve placed in the mechanism base;

[0042] Fig.13 A three-dimensional diagram of an alignment device provided in one embodiment of the utility model;

[0043] Fig.14 A three-dimensional view of the device base, transport rails and carrying plate assembled together;

[0044] Fig.15 Exploded view of the device base, transport rails and load plate. DETAILED DESCRIPTION

[0045] The specific implementation of the utility model is further described below in conjunction with the accompanying drawings. The same parts are represented by the same figure numbers. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the accompanying drawings, and the words "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0046] like Figure 1-12 As shown, an alignment mechanism provided by an embodiment of the utility model is used for automatically aligning the valve cover 72 of the pressure reducing valve 7 with the valve body 71, and includes a mechanism base 1 for accommodating the pressure reducing valve 7, a mechanism upper cover 2 located above the mechanism base 1, and a lifting component 3 for driving the mechanism upper cover 2 to move up and down.

[0047] The mechanism base 1 includes a base body 11 having a valve body placement groove 113 and a valve body alignment unit 12 capable of moving translationally relative to the base body 11 .

[0048] The valve body alignment unit 12 includes a translation slide 121 slidably mounted at the bottom of the valve body placement groove 113, at least one pair of positioning pins 122 connected to the edge of the translation slide 121 and arranged opposite to each other, and a valve body centering column 123 connected to the middle of the translation slide 121 and used for inserting into the center hole 711 of the valve body.

[0049] The upper end of the positioning pin 122 extends above the base body 11 , and the valve body centering column 123 is located in the valve body placement groove 113 .

[0050] The bottom of the mechanism upper cover 2 is provided with at least one pair of positioning sleeves 21 for correspondingly cooperating with at least one pair of positioning pins 122 and a valve cover centering column 22 for inserting into the valve cover center hole 721 .

[0051] When the mechanism upper cover 2 is in the lowered state, the positioning pin 122 is inserted into the positioning sleeve 21 .

[0052] The alignment mechanism provided by the utility model is used to automatically align the valve cover 72 of the pressure reducing valve 7 with the valve body 71. The valve body 71 has a valve body center hole 711 at its center, and the valve cover 72 has a valve cover center hole 721 at its center. The valve body 71 and the valve cover 72 are provided with a plurality of screw holes 73 correspondingly. After the valve cover 72 is aligned with the valve body 71, that is, after the valve cover center hole 721 is aligned or concentric with the valve body center hole 711, the plurality of screw holes 73 on the valve cover 72 and the valve body 71 are aligned up and down respectively, so as to be screwed and locked.

[0053] The alignment mechanism provided by the utility model comprises a mechanism base 1, a mechanism upper cover 2 and a lifting component 3 and the like.

[0054] The mechanism base 1 is used to accommodate the pressure reducing valve 7 , and comprises a base body 11 and a valve body alignment unit 12 .

[0055] The base body 11 has a valve body placement groove 113 with an opening facing upward, and the valve body placement groove 113 is used to place the valve body 71. The valve body alignment unit 12 is assembled with the base body 11 and can move horizontally relative to the base body 11. The translation referred to here means that the movement direction of the valve body alignment unit 12 is parallel to the bottom surface of the base body 11. The valve body alignment unit 12 is used to adjust the horizontal position of the valve body 71 in the valve body placement groove 113 so that it is aligned with the valve cover 72.

[0056] The valve body alignment unit 12 includes a translational slide 121, at least one pair of positioning pins 122 and a valve body centering column 123. The positioning pins 122 and the valve body centering column 123 are respectively arranged on the top surface of the translational slide 121. The positioning pins 122 are arranged on the edge of the translational slide 121, and each pair of positioning pins 122 are arranged opposite to each other. The valve body centering column 123 is arranged in the middle or center of the translational slide 121. The translational slide 121 can be slidably assembled on the bottom of the valve body placement groove 113, and it can only move horizontally (translation) but not slide up and down. As needed, guide grooves can be set around the bottom of the valve body placement groove 113, and the edges around the translational slide 121 are gap-fitted in the guide grooves to achieve that the translational slide 121 can only move horizontally (translation) but not slide up and down. The positioning pin 122 extends upward from the translation slide 121, and its upper end extends above the base body 11. Specifically, the positioning pin 122 can extend upward from the edge of the valve body placement groove 113, or extend upward from the side wall of the base body 11, or extend upward from the outer side of the base body 11. When the translation slide 121 translates, it will drive the positioning pin 122 to translate. Generally, the translation adjustment amount of the translation slide 121 is small, and a certain gap is left around the positioning pin 122 to meet the translation requirement. The valve body centering column 123 is in the valve body placement groove 113, and it is used to be inserted into the valve body center hole 711. Generally, the radius of the valve body centering column 123 matches the radius of the valve body center hole 711, and the valve body centering column 123 can be smoothly inserted into the valve body center hole 711 without radial shaking between the two.

[0057] The mechanism upper cover 2 is located directly above the mechanism base 1, and is lifted and lowered by the lifting member 3. The lifting member 3 can be any member that can be lifted and lowered linearly, for example, a piston member, a motor screw member, and the like.

[0058] The bottom surface of the mechanism upper cover 2 is provided with at least one pair of positioning sleeves 21 extending downward, and the at least one pair of positioning sleeves 21 is configured correspondingly with the at least one pair of positioning pins 122. The number of positioning sleeves 21 is equal to the number of positioning pins 122. The positioning sleeve 21 has a guide hole 211 opening downward. The middle or center of the bottom surface of the mechanism upper cover 2 is provided with a valve cover centering column 22 extending downward, which is used to be inserted into the valve cover center hole 721. Generally, the radius of the valve cover centering column 22 matches the radius of the valve cover center hole 721, and the valve cover centering column 22 can be smoothly inserted into the valve cover center hole 721, and can also be smoothly pulled out from the valve cover center hole 721, and no radial shaking will occur between the two.

[0059] In normal state, the lifting member 3 drives the mechanism cover 2 to rise. When the user places the pressure reducing valve 7 on the mechanism base 1, the lifting member 3 drives the mechanism cover 2 to descend. After the mechanism cover 2 descends to its place, the positioning pin 122 is inserted into the positioning sleeve 21 to align the valve cover 72 with the valve body 71. Specifically, the valve body 71 is placed in the valve body placement groove 113, the valve body centering column 123 is inserted from the bottom into the valve body center hole 711, and the valve cover 72 is placed on the valve body 71. Of course, when the valve cover 72 and the valve body 71 are placed on each other, they are roughly aligned due to their own limiting structure, and only a small deviation occurs. Operate the lifting member 3 to lower the mechanism cover 2, and the positioning pin 122 is first inserted into the positioning sleeve 21. The positioning sleeve 21 is fixed in the radial direction. If the positioning pin 122 has a certain horizontal deviation, when it is inserted into the guide hole 211 of the positioning sleeve 21, it will be affected by the hole wall of the guide hole 211, so that the positioning pin 122 automatically translates and adjusts until the positioning pin 122 is concentric or coaxial with the guide hole 211 and then stops. During the translation of the positioning pin 122, it drives the translation slide 121 and the valve body centering column 123 to translate, and the valve body centering column 123 drives the valve body 71 to translate. The mechanism cover 2 continues to move downward, and the valve cover centering column 22 stops descending after being inserted into the valve cover center hole 721 by a preset distance. At this time, the valve cover 72 is completely aligned with the valve body 71, and the valve cover 72 and the screw holes 73 on the valve body 71 are completely aligned with the center. Then operate the lifting component 3 to lift the mechanism cover 2 and screw the screw holes 73.

[0060] As required, a tip portion may be provided at the top of the positioning pin 122 , and a tapered surface may be provided at the lower opening of the guide hole 211 , so as to facilitate guiding the positioning pin 122 to be inserted into the guide hole 211 .

[0061] In summary, the alignment mechanism provided by the utility model can automatically align the valve cover 72 of the pressure reducing valve 7 with the valve body 71, saving labor, improving work efficiency, no longer relying on the operating level of the workers, and the alignment standards are unified, which improves the alignment effect of the valve cover 72 and the valve body 71.

[0062] In one embodiment, if Figure 6-8 As shown, the base body 11 includes a main body bottom plate 111 and a main body frame 112 connected to the main body bottom plate 111 and surrounding the valve body placement groove 113.

[0063] The main frame 112 includes a frame through hole 1121 for the positioning pin 122 to pass through.

[0064] The translation slide plate 121 is slidably assembled between the main body bottom plate 111 and the main body frame 112 , and the positioning pin 122 passes through the frame through hole 1121 upwards.

[0065] The valve body centering column 123 passes through the bottom notch 1131 of the valve body placement groove 113 and extends into the valve body placement groove 113 .

[0066] In this embodiment, the base body 11 is composed of a main body bottom plate 111 and a main body frame 112. The main body frame 112 is connected to the main body bottom plate 111. A cavity is formed between the bottom surfaces of the main body bottom plate 111 and the main body frame 112. The translation slide 121 can be slidably assembled in the cavity. The bottom notch 1131 of the valve body placement groove 113 passes through the bottom surface of the main body frame 112. The valve body centering column 123 passes through the bottom notch 1131 and extends into the valve body placement groove 113. The size of the bottom notch 1131 is much larger than the diameter of the valve body centering column 123. The valve body centering column 123 can translate relative to the bottom notch 1131.

[0067] The main frame 112 is provided with at least one pair of frame through holes 1121 arranged opposite to each other, the number of the frame through holes 1121 is equal to the positioning pins 122, and the positions of the frame through holes 1121 are configured correspondingly to the positioning pins 122. The diameter of the frame through holes 1121 is larger than the diameter of the positioning pins 122, and the positioning pins 122 pass through the frame through holes 1121 upward, and the positioning pins 122 can move horizontally in the frame through holes 1121.

[0068] Such an arrangement can limit the valve body alignment unit 12 from sliding up and down, and the main body of the positioning pin 122 is hidden in the main frame 112. The positioning pin 122 is isolated from the valve body placement groove 113 and will not interfere with the pressure reducing valve 7 in the valve body placement groove 113. During installation, the valve body alignment unit 12 is first inserted from the bottom, and then the main body bottom plate 111 is installed to the bottom of the main frame 112 to limit the valve body alignment unit 12. When the valve body alignment unit 12 needs to be removed, the main body bottom plate 111 is first removed from the bottom of the main frame 112, and then the valve body alignment unit 12 is removed.

[0069] In one embodiment, if Fig. 9 As shown, the bottom of the main frame 112 has a skateboard placement groove 1122 that communicates with the bottom groove 1131. The translational skateboard 121 can be slidably assembled in the skateboard placement groove 1122, which can reduce the thickness between the main base plate 111 and the main frame 112, so that the main base plate 111 is directly attached to the bottom surface of the main frame 112.

[0070] In one embodiment, if Figure 7 As shown, the valve body alignment unit 12 includes a pair of positioning pins 122 , and the pair of positioning pins 122 are distributed on a diagonal line of the translation slide 121 .

[0071] In this embodiment, a pair of positioning pins 122 are provided on the translation slide 121, and the two positioning pins 122 are distributed at both ends of a diagonal line of the translation slide 121, that is, the two positioning pins 122 are located at the diagonal of the translation slide 121, and accordingly, a pair of positioning sleeves 21 are provided on the bottom surface of the mechanism upper cover 2. The use of a pair of positioning pins 122 and a pair of positioning sleeves 21 arranged diagonally can meet the need of driving the translation slide 121 to slide in four directions, thereby simplifying the structure.

[0072] In one embodiment, if Figure 7 As shown, the upper end of the positioning pin 122 has a tapered end portion 1221, which facilitates insertion into the guide hole 211 of the positioning sleeve 21. During the insertion process, the tapered surface can be used to adaptively adjust the centering.

[0073] In one embodiment, if Figure 5 As shown, the lower port 212 of the positioning sleeve 21 is a bell mouth, which is conducive to guiding the tapered end 1221 to be inserted into the guide hole 211.

[0074] In one embodiment, if Figure 4 and Fig.10 As shown, the bottom of the mechanism upper cover 2 is provided with an auxiliary positioning member 23 around the valve cover centering column 22 for positioning with the screw hole 73 on the valve cover 72. The auxiliary positioning member 23 can be a plug column or a plug sleeve with a diameter smaller than the diameter of the screw hole 73, and its lower end is a conical tip. After the mechanism upper cover 2 is lowered into place, it is inserted into the screw hole 73 below to assist in aligning the upper and lower screw holes 73.

[0075] In one embodiment, if Figure 1-3 As shown, the lifting member 3 includes a pair of lifting elements 31 and a lifting plate 32 connected between the pair of lifting elements 31. The mechanism upper cover 2 is connected to the bottom of the lifting plate 32.

[0076] In this embodiment, the lifting member 3 uses two sets of lifting elements 31 and a lifting plate 32. The lifting element 31 can be a cylinder, and the two ends of the lifting plate 32 are respectively connected to the telescopic ends of the two sets of lifting elements 31, and the lifting plate 32 is driven to rise and fall smoothly by the two sets of lifting elements 31. The mechanism cover 2 is connected to the bottom surface of the lifting plate 32 by pins.

[0077] like Fig.13 As shown, an alignment device provided by one embodiment of the utility model includes multiple sets of alignment mechanisms as described in any of the previous embodiments, and the multiple sets of alignment mechanisms are arranged in a front-to-back spacing.

[0078] The alignment device provided by the utility model comprises a plurality of alignment mechanisms, which are arranged in a front-to-back spacing. Any two adjacent alignment mechanisms are spaced apart by a preset distance. Each alignment mechanism represents a workstation, and the valve covers 72 and valve bodies 71 of a plurality of pressure reducing valves 7 can be aligned in one operation.

[0079] In one embodiment, if Figure 13-15 As shown, the alignment device includes a device base 4 , a transport track 5 arranged on the device base 4 , and a carrying plate 6 located on the transport track 5 .

[0080] Multiple sets of lifting components 3 are installed on the device base 4 at intervals in front and back, multiple sets of mechanism upper covers 2 are respectively connected to the multiple sets of lifting components 3, and multiple sets of mechanism bases 1 are installed on the bearing plate 6 at intervals in front and back.

[0081] In this embodiment, the alignment device also includes a device base 4, a transport track 5 and a load-bearing plate 6. The transport track 5 is arranged on the device base 4, and is driven by a power mechanism. The load-bearing plate 6 is on the transport track 5, and can be driven to move forward and backward by the transport track 5. The front end of the device base 4 has a limiting structure 41. When the load-bearing plate 6 moves forward into position, the limiting structure 41 supports the load-bearing plate 6. The power mechanism stops running. The power mechanism can be a motor. When the motor runs forward, it will drive the load-bearing plate 6 to move forward through the transport track 5. When the motor runs reversely, it will drive the load-bearing plate 6 to move backward through the transport track 5.

[0082] Multiple sets of lifting components 3 are installed on the device base 4 at intervals. Multiple sets of mechanism upper covers 2 are respectively connected to the multiple sets of lifting components 3, and the spacing between any two sets of mechanism upper covers 2 is equal, and the spacing is D. Multiple sets of mechanism bases 1 are installed on the bearing plate 6 at intervals, and the spacing between any two sets of mechanism bases 1 is equal, and the spacing is D.

[0083] Initially, the carrying plate 6 is driven by the transport track 5 to move backward, and the carrying plate 6 moves backward with the upper mechanism base 1 until the frontmost mechanism base 1 moves out from under the lifting member 3, so as to place the valve body 71 and the valve cover 72 in each mechanism base 1. The transport track 5 is long enough, and only a part of the transport track 5 is shown in the figure. After that, the carrying plate 6 is driven by the transport track 5 to move forward, and the carrying plate 6 moves forward with the upper mechanism base 1 until the carrying plate 6 is supported by the limiting structure 41. At this time, each set of mechanism base 1 is under a set of mechanism upper cover 2. Then, multiple sets of lifting members 3 are synchronously operated to align the valve covers 72 and valve bodies 71 of multiple pressure reducing valves 7 at one time. After the alignment is completed, the mechanism upper cover 2 is raised, and the carrying plate 6 is driven by the transport track 5 to move backward, and the carrying plate 6 moves backward with the upper mechanism base 1 until the frontmost mechanism base 1 moves out from under the lifting member 3, and then each pressure reducing valve 7 is screwed and locked by an electric tool.

[0084] As needed, the above technical solutions can be combined to achieve the best technical effect.

[0085] The above are only the principles and preferred embodiments of the present invention. It should be noted that, for those skilled in the art, on the basis of the principles of the present invention, several other modifications can be made, which should also be considered as the protection scope of the present invention.

Claims

1. An alignment mechanism for automatically aligning a valve cover and a valve body of a pressure reducing valve, characterized in that: It includes a mechanism base for accommodating a pressure reducing valve, a mechanism upper cover located above the mechanism base, and a lifting component for driving the mechanism upper cover to move up and down; The mechanism base comprises a base body having a valve body placement groove and a valve body alignment unit capable of translationally moving relative to the base body; The valve body alignment unit comprises a translation slide slidably mounted on the bottom of the valve body placement groove, at least one pair of positioning pins connected to the edge of the translation slide and arranged oppositely, and a valve body centering column connected to the middle of the translation slide and used to be inserted into the center hole of the valve body; The upper end of the positioning pin extends above the base body, and the valve body centering column is located in the valve body placement groove; The bottom of the mechanism upper cover is provided with at least one pair of positioning sleeves for correspondingly cooperating with at least one pair of positioning pins and a valve cover centering column for inserting into the center hole of the valve cover; When the mechanism upper cover is in a descending state, the positioning pin is inserted into the positioning sleeve.

2. The alignment mechanism according to claim 1, characterized in that: The base body comprises a main body bottom plate and a main body frame connected to the main body bottom plate and surrounding the valve body placement groove; The main frame includes a frame through hole for the positioning pin to pass through; The translation slide is slidably mounted between the main body bottom plate and the main body frame, and the positioning pin passes through the frame through hole upward; The valve body centering column passes through the bottom notch of the valve body placement groove and extends into the valve body placement groove.

3. The alignment mechanism according to claim 2, characterized in that: The bottom of the main frame is provided with a slide plate placement groove which is communicated with the bottom notch, and the translation slide plate can be slidably assembled in the slide plate placement groove.

4. The alignment mechanism according to any one of claims 1 to 3, characterized in that: The valve body alignment unit comprises a pair of positioning pins, and the pair of positioning pins are distributed on a diagonal line of the translation slide.

5. The alignment mechanism according to any one of claims 1 to 3, characterized in that: The upper end of the positioning pin has a tapered end.

6. The alignment mechanism according to claim 5, characterized in that: The lower port of the positioning sleeve is a bell mouth.

7. The alignment mechanism according to any one of claims 1 to 3, characterized in that: The bottom of the mechanism upper cover is located around the valve cover centering column and is provided with auxiliary positioning pieces for positioning with the screw holes on the valve cover.

8. The alignment mechanism according to any one of claims 1 to 3, characterized in that: The lifting member comprises a pair of lifting elements and a lifting plate connected between the pair of lifting elements; The mechanism upper cover is connected to the bottom of the lifting plate.

9. An alignment device, characterized in that: It comprises a plurality of alignment mechanisms as described in any one of claims 1 to 8, wherein the plurality of alignment mechanisms are arranged in a front-to-back spacing.

10. The alignment device according to claim 9, characterized in that: It comprises a device base, a transport track arranged on the device base and a carrying plate on the transport track; A plurality of sets of lifting components are installed on the device base at intervals in front and back, a plurality of sets of mechanism upper covers are respectively connected with a plurality of sets of lifting components, and a plurality of sets of mechanism bases are installed on the bearing plate at intervals in front and back.

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