CN210546434U

CN210546434U - Valve guide pipe size detection device

Info

Publication number: CN210546434U
Application number: CN201921459492.5U
Authority: CN
Inventors: 陈金贵; 黄功根; 江海彬
Original assignee: Vscan Xiamen Intelligent Technology Co ltd
Current assignee: Suzhou Weishiken Testing Technology Co ltd
Priority date: 2019-09-04
Filing date: 2019-09-04
Publication date: 2020-05-19
Anticipated expiration: 2029-09-04

Abstract

The utility model relates to a valve guide size detection device, can include feed mechanism, the carousel, size detection subassembly and discharge mechanism, the carousel is arranged between feed mechanism and discharge mechanism, constitute by two parallel spaced apart circular slabs of fixed mounting in the pivot, a plurality of even spaced apart draw-in grooves have been arranged on its periphery, the draw-in groove is used for accepting the valve guide who waits to detect that comes from feed mechanism, size detection subassembly includes the laser diameter measuring appearance, end size detection CCD camera and terminal surface concentricity detect the CCD camera, discharge mechanism is used for shifting valve guide from the carousel to certified products container and defective products container according to the testing result. The utility model discloses compact structure can detect the external dimension of valve guide automatically and distinguish certified products and defective work automatically, has that production efficiency is high, the detection accuracy is high, detect reliable characteristics.

Description

Valve guide pipe size detection device

Technical Field

The utility model belongs to the automatic check out test set field specifically relates to a valve guide size detection device.

Background

The valve guide pipe is a guide device of the automobile engine valve, plays a role in guiding the valve and enables heat on a valve rod to be transmitted to a cylinder cover through the valve guide pipe. Since the valve guide is a precision part, the requirement on dimensional accuracy is high, and the dimensions (such as the outer diameter, the step size of the end, the chamfer size, the concentricity of two ends and the like) of each position of the valve guide need to be detected in the production process. Most of the existing detection is carried out by staff with rich experience, the labor cost is high, false detection is easy to occur, and the efficiency is low.

Disclosure of Invention

The utility model aims at providing a valve guide size detection device to solve above-mentioned problem. Therefore, the utility model discloses a specific technical scheme as follows:

a valve guide pipe size detection device comprises a feeding mechanism, a rotary table, a size detection assembly and a discharging mechanism, the turntable is arranged between the feeding mechanism and the discharging mechanism and consists of two parallel round plates which are fixedly arranged on the rotating shaft and are spaced, a plurality of clamping grooves which are evenly spaced are arranged on the periphery of the feeding mechanism and are used for receiving the valve guide pipe to be detected from the feeding mechanism, the size detection component comprises a laser diameter gauge, an end size detection CCD camera and an end face concentricity detection CCD camera, the transmitting end and the receiving end of the laser range finder are respectively positioned at two radial sides of the turntable, the end size detection CCD camera is arranged above the turntable, the end face concentricity detection CCD cameras are arranged on two axial sides of the rotary table, and the discharging mechanism is used for transferring the valve guide pipe from the rotary table to a qualified product container and an unqualified product container according to a detection result.

Further, feed mechanism includes slope slide, baffle and clamp plate, the baffle is installed the both sides of slope slide, and the distance between it is a bit more than the length of valve guide, the clamp plate is unsettled to be installed slope slide top, its high setting makes the valve guide can not superpose, the lower extreme of slope slide is close to the carousel to make the valve guide roll into in the draw-in groove.

Further, the feeding mechanism further comprises a width adjusting mechanism for adjusting the distance between the baffles, the width adjusting mechanism comprises an adjusting hand wheel, two synchronous belt wheels, a belt, two screw rods, four nuts, two bearing blocks, four bearings, two mounting plates and four connecting blocks, the two bearing blocks are fixedly mounted on the lower surface of the inclined slideway at intervals, each screw rod is mounted on the bearing block through two bearings, the positions close to the two ends are respectively provided with threads with opposite spiral directions, the two mounting plates are respectively positioned at the two sides of the bearing seat, the nuts are fixedly arranged in the mounting plates, the synchronous belt wheel is fixedly arranged at one end of the screw rod, the belt is wound on the two synchronous belt wheels, the adjusting hand wheel is in driving connection with one synchronous belt wheel, one end of the connecting block is fixed on the mounting plate, and the other end of the connecting block is fixed on the baffle plate.

Further, valve guide size detection subassembly still includes the slip table subassembly, the slip table subassembly includes bottom plate, curb plate, horizontal slide rail, horizontal slider, connecting block, lead screw support, lead screw and motor, horizontal slide rail, connecting block and lead screw support fixed mounting be in on the bottom plate, horizontal slider sliding connection is in on the horizontal slide rail, the motor is installed the curb plate, its output shaft with lead screw drive is connected, install the nut in the connecting block, the lead screw is worn to locate nut and lead screw support, horizontal slider and connecting block with the mount pad fixed connection of end size detection CCD camera.

Further, valve guide size detection subassembly still includes high adjustment mechanism, high adjustment mechanism includes mounting panel, perpendicular slide rail, perpendicular slider, screw rod, nut piece, screw rod mount pad and hand wheel, perpendicular slide rail, nut piece and screw rod mount pad fixed mounting are on the mounting panel, perpendicular slider sliding engagement is in on the perpendicular slide rail, perpendicular slider and nut piece with the bottom plate fixed connection of slip table subassembly, the screw rod is worn to locate nut piece and screw rod mount pad, hand wheel fixed mounting be in the upper end of screw rod.

Still further, the mounting plate is fixedly mounted on two upright posts, wherein one upright post is provided with height indication scales, the side plate is fixedly mounted with a pointer, and the pointer is aligned with the height indication scales.

The discharging mechanism comprises a pushing mechanism, a qualified product discharging mechanism and an unqualified product discharging mechanism, the pushing mechanism comprises a push rod and a push rod driving device, the push rod is located between the two circular plates of the rotary table and used for pushing the valve guide pipe qualified for detection to the feeding end of the qualified product discharging mechanism, the unqualified product discharging mechanism comprises a distributing hopper, a distributing motor and an unqualified product discharging slideway, the distributing hopper is fixedly installed on the output shaft of the distributing motor and located below the discharging station of the rotary table, the unqualified product discharging slideway is arranged below the distributing hopper and provided with a plurality of sub slideways which are separated from each other, each sub slideway corresponds to an unqualified product with one defect, and the distributing motor rotates the distributing hopper to the corresponding sub slideway according to the detection result.

Furthermore, the lower end of the sub-slideway is provided with an opening, and the unqualified product container is positioned below the opening.

Furthermore, the qualified product discharging mechanism comprises an inclined slide way, baffle plates and a pressing plate, wherein the upper end of the inclined slide way is close to the rotary table so as to receive the valve guide pipe pushed out from the rotary table by the push rod, the baffle plates are arranged on two sides of the inclined slide way, the distance between the baffle plates is slightly larger than the length of the valve guide pipe, and the pressing plate is arranged above the inclined slide way in a suspending way and is set to be high so that the valve guide pipes cannot be overlapped.

Still further, the qualified product discharging mechanism further comprises a shifting wheel and a driving motor for driving the shifting wheel to rotate, and the shifting wheel is arranged at the discharging end of the inclined slide way.

The utility model adopts the above technical scheme, the beneficial effect who has is: the utility model discloses compact structure can detect the external dimension of valve guide automatically and distinguish certified products and defective work automatically, has that production efficiency is high, detect the precision high, detect reliable characteristics.

Drawings

To further illustrate the embodiments, the present invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. With these references, one of ordinary skill in the art will appreciate other possible embodiments and advantages of the present invention. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.

Fig. 1 is a perspective view of a valve guide size detection apparatus according to an embodiment of the present invention;

FIG. 2 is a perspective view of a loading mechanism of the valve guide size detection apparatus shown in FIG. 1;

FIG. 3 is a perspective view of the turntable and pusher mechanism of the valve guide sizing device shown in FIG. 1;

FIG. 4 is a perspective view of a size detection assembly of the valve guide size detection apparatus shown in FIG. 1;

FIG. 5 is another perspective view of the size detection assembly shown in FIG. 4 with portions removed;

FIG. 6 is a perspective view of a non-defective product discharge mechanism of the valve guide size detection apparatus shown in FIG. 1;

fig. 7 is a perspective view of a reject discharging mechanism of the valve guide size detection apparatus shown in fig. 1.

Detailed Description

The present invention will now be further described with reference to the accompanying drawings and detailed description.

As shown in fig. 1 to 7, a valve guide size detection device may include a feeding mechanism 1, a turntable 2, a size detection assembly 3, a discharging mechanism 4, a control system (not shown), and the like. The rotary table 2 is arranged between the feeding mechanism 1 and the discharging mechanism 4, and is composed of two parallel round plates 21 fixedly mounted on a rotating shaft 22, a plurality of clamping grooves 211 evenly spaced are arranged on the periphery of the rotary table, and the clamping grooves 211 are used for receiving the valve guide pipe 100 to be detected from the feeding mechanism 1. The size detection assembly 3 may include a laser caliper 31, a tip size detection CCD camera 32, and an end face concentricity detection CCD camera 33. The transmitting end and the receiving end of the laser range finder 31 are respectively located at both sides of the turntable 2 in the radial direction to detect the outer diameter of the valve guide 100. Specifically, the laser range finder 31 sends the measured outer diameter data to the control system, and the control system compares the outer diameter data with the standard, and determines that the data is qualified if the data meets the standard, or determines that the data is unqualified if the data does not meet the standard. An end size detection CCD camera 32 is disposed above the turntable 2 for detecting the sizes (e.g., chamfer size, step size, etc.) of both ends of the valve guide 100. Specifically, the end size detection CCD camera 32 sends the shot picture to the control system, and the control system processes the picture through a corresponding program to obtain a corresponding size value and compares the size value with the standard, and if the size value meets the standard, the determination is made as qualified, otherwise, the determination is not qualified. The end face concentricity detection CCD cameras 33 are arranged on both sides in the axial direction of the turntable 2, and detect the end face concentricity of the valve guide 100. Specifically, the pictures shot by the end face concentricity detection CCD camera 33 are sent to the control system, the control system processes the pictures through a corresponding program and compares the concentricity of the pictures of the two end faces, and if the concentricity standard is satisfied, the judgment is made as qualified, otherwise, the judgment is not qualified. The discharging mechanism 4 is used for transferring the valve guide pipe 100 from the turntable to a qualified product container and a unqualified product container according to the detection result. The control system is a PLC-based control system, and those skilled in the art can specifically configure and program the control system according to actual needs. And will not be described further herein. The specific structures of the feeding mechanism 1, the turntable 2, the size detection assembly 3 and the discharging mechanism 4 are described below.

As shown in fig. 2, the feed mechanism 1 includes an inclined chute 11, a baffle 12, and a platen 13. The upper end of the inclined slideway 11 is a feed inlet, and the lower end is close to the rotary disc 2, so that the valve guide pipe 100 can roll into the clamping groove 211. The baffles 12 are mounted on both sides of the inclined ramp 11, and the distance between them, which is adjustable by the width adjustment mechanism 14 according to the length of the valve guide 100, is generally slightly greater than the length of the valve guide 100 so that the valve guide 100 does not skew during sliding down. Specifically, the width adjustment mechanism 14 includes an adjustment handwheel 141, two timing pulleys 142, a belt 143, two screws 144, four nuts (not shown), two bearing blocks (not shown), four bearings (not shown), two mounting plates 145, and four connecting blocks 146. The two bearing seats are fixedly installed on the lower surface of the inclined slideway 11 at intervals, each screw rod 144 is installed on the bearing seat through two bearings, threads with opposite spiral directions are respectively arranged on the positions close to the two ends of the bearing seat, two installation plates 145 are respectively positioned on the two sides of the bearing seat, nuts are fixedly installed in the installation plates and meshed with the thread parts of the screw rods 144, the synchronous pulleys 142 are fixedly installed on one ends of the screw rods 144, the belt 143 is wound on the two synchronous pulleys 142, the adjusting hand wheel 141 is in driving connection with one synchronous pulley 142, one end of the connecting block 146 is fixed on the installation plate 145, and the other end of the connecting block is. By rotating the adjusting handwheel 141, the two mounting plates 145 are driven to move towards or away from each other, and then the baffles 12 are driven to move towards or away from each other, so as to adjust the distance between the baffles 12 (i.e. the width of the inclined slideway 11).

The pressure plate 13 is mounted in a floating manner above the inclined chute 11 and has a height set slightly larger than the outer diameter of the valve guide 100 so that the valve guide 100 does not overlap during the sliding down. In the illustrated embodiment, the height of the platen 13 is adjusted by changing the mounting position of its mount 132. The pressure plate 13 is provided with an opening 131 near the entrance of the inclined chute 11, and a proximity switch 15 is mounted above the opening, and the proximity switch 15 is used for determining whether the material is short or not. Preferably, the pressing plate portion where the opening 131 is located is tilted upward to facilitate loading.

In addition, a pair of photoelectric sensors 16 is arranged on two sides of the inlet of the inclined slideway 11, and the photoelectric sensors 16 are used for checking whether the material is crooked or not, stopping the machine when the material is crooked, giving an alarm and processing the material by manpower.

As shown in fig. 3, the rotating shaft 22 is fixedly mounted on the support 23 through a bearing and is in driving connection with the motor 24. The rotating shaft 22 is also fixedly provided with an induction disc 25, the induction disc 25 is provided with a groove 251 corresponding to the clamping groove 211, and the support 23 is provided with a groove-shaped photoelectric switch 26. The sensing disc 25 cooperates with the slot-shaped photoelectric switch 26 to detect the rotation angle of the rotary disc 22.

As shown in fig. 4 and 5, in order to facilitate the inspection of the valve guides 100 of different lengths by the tip size inspection CCD camera 32, the tip size inspection CCD camera 32 is mounted on a slide table assembly 34. The slide table assembly 34 may include a bottom plate 341, a side plate 342, a horizontal slide rail 343, a horizontal slider 344, a connecting block 345, a lead screw holder 346, a lead screw 347, and a motor 348. The horizontal sliding rail 343, the connecting block 345 and the lead screw support 346 are fixedly mounted on the bottom plate 341, the horizontal sliding block 344 is slidably engaged with the horizontal sliding rail 343, the motor 348 is mounted on the side plate 342, an output shaft thereof is drivingly connected with the lead screw 347 (for example, through a coupling), a nut (not shown) is mounted in the connecting block 3434, the lead screw 347 is inserted into the nut and the lead screw support 346, and the horizontal sliding block 344 and the connecting block 345 are fixedly connected with the mounting seat 321 of the end size detection CCD camera 32. The motor 348 drives the lead screw 347 to rotate, and drives the horizontal slider 344 to move along the horizontal slide rail 343, so that the end size detection CCD camera 32 is adjusted to a required horizontal position to be suitable for the length of the detected valve guide. Preferably, motor 348 is a stepper motor or a servo motor to control movement of tip size detection CCD camera 32.

In the illustrated embodiment, the valve guide size detection apparatus may further include a height adjustment mechanism 35 for adjusting the height of the tip size detection CCD camera 32. Specifically, the height adjusting mechanism 35 may include a mounting plate 351, a vertical slide rail 352, a vertical slide block 353, a screw rod 354, a nut block 355, a screw rod mounting seat 356 and a hand wheel 357, wherein the mounting plate 351 is fixedly mounted on the two vertical columns 36, the vertical slide rail 352, the nut block 355 and the screw rod mounting seat 356 are fixedly mounted on the mounting plate 351, the vertical slide block 353 is slidably engaged with the vertical slide rail 352, the bottom plate 341 of the sliding table assembly 34 is fixedly connected with the vertical slide block 353 and the nut block 355, the screw rod 354 is inserted into the nut block 355 and the screw rod mounting seat 356, and the hand wheel 357 is fixedly mounted at the upper end of the screw rod 354. By rotating the hand wheel 357, the height adjustment of the end size detection CCD camera 32 can be realized.

In order to visually adjust the height of the head size detection CCD camera 32, a height indication scale 358 is provided on one of the upright posts 36, and a pointer 359 is fixedly mounted on the side plate 342, and the pointer 359 is aligned with the height indication scale 358. Height indicating scale 358 may be machined directly into the column or may be a label paper that is affixed to the column.

In order to adapt the end face concentricity detection CCD camera 33 to valve guides of different lengths, the mount 331 of the end face concentricity detection CCD camera 33 is slidably mounted on the slide rail 332 and fixed by a screw 333. When the adjustment is needed, the screw 333 is loosened, then the end face concentricity detection CCD camera 33 is moved to a desired position, and finally the screw 333 is tightened for fixation.

It should be noted that the laser caliper 31, tip size detection CCD camera 32 and end face concentricity detection CCD camera 33 are all commercially available. In addition, in order to ensure the photographing effect of the tip size detection CCD camera 32 and the end face concentricity detection CCD camera 33, the valve guide size detection apparatus is also provided with the

respective light sources

5 and 6, as shown in fig. 1. The light source 5 is used for the exit-end face concentricity detection CCD camera 33 and is a coaxial annular light source, and the light source 6 is used for the tip size detection CCD camera 32 and is an upward-illuminating planar light source.

As shown in fig. 1, 3, 6, and 7, the discharging mechanism 4 includes a material pushing mechanism 41, a non-defective product discharging mechanism 42, and a defective product discharging mechanism 43. Wherein, the pushing mechanism 41 comprises a push rod 411 and a push rod driving device 412, the push rod 41 is located between the two circular plates 21 of the turntable 2, and is used for pushing the qualified valve guide pipe 100 to the feeding end (specifically, the inlet of the slideway 421) of the qualified product discharging mechanism 42. The discharging mechanism 4 adopts the principle of zero misjudgment of qualified workpieces, and the pushing mechanism 41 acts only when the valve guide pipe is qualified in detection, so that unqualified valve guide pipes cannot be mixed into qualified valve guide pipes due to the false operation of the pushing mechanism 41. The push rod 41 has a push block at its top end and a push rod driving device 412 at its lower end. Preferably, the push rod driving means 412 is a pneumatic cylinder.

The acceptable product discharging mechanism 42 is similar in structure to the feeding mechanism 1, and also includes an inclined slide 421, a baffle 422, and a pressing plate 423. The upper end of the inclined ramp 421 is close to the turntable 2 to receive the valve guide 100 pushed out of the turntable by the push rod 41. Baffles 422 are mounted on either side of the inclined ramp 421 with a distance slightly greater than the length of the valve guide 100. The distance between the baffles 422 may be adjusted by a width adjustment mechanism 424. The structure of the width adjustment mechanism 424 is the same as the width adjustment structure 14 of the feed mechanism 1, and will not be described here. The pressure plate 423 is mounted in a floating manner above the inclined slide 421 at a height such that the valve guides 100 do not overlap. Likewise, the height of the pressure plate 423 may also be manually adjusted.

In the illustrated embodiment, the accept discharge mechanism 42 further includes a thumb wheel 425 and a drive motor 426 for driving the thumb wheel 425 to rotate, the thumb wheel 425 being disposed at the discharge end of the inclined slide 421 for placing the accept valve guides 100 one by one to the accept container or the feed station of the next process. Preferably, the drive motor 426 is a stepper motor or a servo motor. A sensing plate 427 is also fixed on the rotating shaft of the thumb wheel 425, and the sensing plate 427 cooperates with a groove-shaped photoelectric switch 428 for detecting the rotating angle of the thumb wheel 425.

The unqualified product discharging mechanism 43 may include a material distributing hopper 431, a material distributing motor 432 and an unqualified product discharging slideway 433, wherein the material distributing hopper 431 is fixedly installed on the output shaft of the material distributing motor 432 and is located below the discharging station of the turntable 2. The reject discharge chute 433 is arranged below the distribution hopper 431 and is provided with a plurality of spaced-apart sub-chutes, each corresponding to one reject container, i.e. to a defective reject. The lower end of the sub-chute is provided with an opening 4331 below which a reject container is arranged, from which opening 4331 the valve guide can fall into the reject container. The material distributing motor 431 rotates the material distributing hopper 431 to the corresponding sub-slideway according to the detection result so as to place the unqualified products into the corresponding unqualified product containers respectively according to the defect types. The defect analysis method is beneficial to carrying out statistical analysis on the defects so as to find out the causes of the defects and achieve the aim of improving the production process.

Now briefly explaining the working principle of the valve guide size detection device of the present invention. The valve guide pipes which are orderly arranged roll into the clamping grooves of the rotary table 2 from the inclined slide ways of the feeding mechanism 1 in sequence, along with the rotation of the rotary table 2, the step sizes, the chamfer sizes and the like at the two ends of the valve guide pipes are detected through the end size detection CCD camera 32, the outer diameters of the valve guide pipes are detected through the laser diameter gauge 31, the concentricity of the two ends of the valve guide pipes is detected through the end face concentricity detection CCD camera 33, the qualified valve guide pipes are sent into the inclined slide ways of the qualified product discharging mechanism 42 through the material pushing mechanism according to the detection result, and the unqualified valve guide pipes are sorted and are respectively placed into the sub-slide ways of the different unqualified product discharging mechanisms 43 according to different defects. The whole detection process is automatically carried out, manual processing is only needed under abnormal conditions, a large number of workers are not needed, the labor cost is low, the production efficiency is high, and the detection accuracy is high.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A valve guide pipe size detection device is characterized by comprising a feeding mechanism, a rotary table, a size detection assembly and a discharging mechanism, the turntable is arranged between the feeding mechanism and the discharging mechanism and consists of two parallel round plates which are fixedly arranged on the rotating shaft and are spaced, a plurality of clamping grooves which are evenly spaced are arranged on the periphery of the feeding mechanism and are used for receiving the valve guide pipe to be detected from the feeding mechanism, the size detection component comprises a laser diameter gauge, an end size detection CCD camera and an end face concentricity detection CCD camera, the transmitting end and the receiving end of the laser range finder are respectively positioned at two radial sides of the turntable, the end size detection CCD camera is arranged above the turntable, the end face concentricity detection CCD cameras are arranged on two axial sides of the rotary table, and the discharging mechanism is used for transferring the valve guide pipe from the rotary table to a qualified product container and an unqualified product container according to a detection result.

2. The valve guide size detection device according to claim 1, wherein the feeding mechanism comprises an inclined slide, baffles and a pressure plate, the baffles are arranged on two sides of the inclined slide, the distance between the baffles is slightly larger than the length of the valve guide, the pressure plate is arranged above the inclined slide in a suspension mode, the height of the pressure plate is set to enable the valve guide not to be overlapped, and the lower end of the inclined slide is close to the rotary table so that the valve guide can roll into the clamping groove.

3. The valve guide size detecting device according to claim 2, wherein the feeding mechanism further comprises a width adjusting mechanism for adjusting the distance between the baffles, the width adjusting mechanism comprises an adjusting handwheel, two synchronous pulleys, a belt, two screw rods, four nuts, two bearing seats, four bearings, two mounting plates and four connecting blocks, the two bearing seats are fixedly mounted on the lower surface of the inclined slideway at intervals, each screw rod is mounted on the bearing seat through two bearings, threads with opposite spiral directions are respectively arranged on the positions close to the two ends of the screw rod, the two mounting plates are respectively arranged on the two sides of the bearing seat, the nuts are fixedly mounted in the mounting plates and meshed with the thread portions of the screw rods, the synchronous pulleys are fixedly mounted on the one ends of the screw rods, the belt is looped around the two synchronous pulleys, and the adjusting handwheel is connected with one of the synchronous pulleys through a wheel drive, one end of the connecting block is fixed on the mounting plate, and the other end of the connecting block is fixed on the baffle.

4. The valve guide size detection device according to claim 1, wherein the valve guide size detection assembly further comprises a sliding table assembly, the sliding table assembly comprises a bottom plate, a side plate, a horizontal sliding rail, a horizontal sliding block, a connecting block, a lead screw support, a lead screw and a motor, the horizontal sliding rail, the connecting block and the lead screw support are fixedly mounted on the bottom plate, the horizontal sliding block is slidably engaged on the horizontal sliding rail, the motor is mounted on the side plate, an output shaft of the motor is in driving connection with the lead screw, a nut is mounted in the connecting block, the lead screw is arranged in the nut and the lead screw support in a penetrating manner, and the horizontal sliding block and the connecting block are fixedly connected with a mounting seat of the end size detection CCD camera.

5. The valve guide size detection device of claim 4, wherein the valve guide size detection assembly further comprises a height adjustment mechanism, the height adjustment mechanism comprises a mounting plate, a vertical slide rail, a vertical slide block, a screw, a nut block, a screw mounting seat and a hand wheel, the vertical slide rail, the nut block and the screw mounting seat are fixedly mounted on the mounting plate, the vertical slide block is slidably engaged on the vertical slide rail, the vertical slide block and the nut block are fixedly connected with the bottom plate of the sliding table assembly, the screw penetrates through the nut block and the screw mounting seat, and the hand wheel is fixedly mounted at the upper end of the screw.

6. The valve guide size detection device according to claim 5, wherein the mounting plate is fixedly mounted on two columns, wherein one column is provided with a height indication scale, and the side plate is fixedly mounted with a pointer which is aligned with the height indication scale.

7. The valve guide size detection device according to claim 1, wherein the discharging mechanism includes a material pushing mechanism, a qualified product discharging mechanism and a rejected product discharging mechanism, the pushing mechanism comprises a push rod and a push rod driving device, the push rod is positioned between the two circular plates of the turntable, used for pushing the valve guide pipe qualified by detection to the feeding end of the qualified product discharging mechanism, the unqualified product discharging mechanism comprises a material distributing hopper, a material distributing motor and an unqualified product discharging slideway, the material distributing hopper is fixedly arranged on an output shaft of the material distributing motor and is positioned below a discharging station of the turntable, the unqualified product discharging slide way is arranged below the material distribution hopper and is provided with a plurality of sub-slide ways which are separated from each other, each sub-slide way corresponds to a defective unqualified product, and the material distribution motor rotates the material distribution hopper to the corresponding sub-slide way according to a detection result.

8. The valve guide size detection apparatus of claim 7, wherein the sub-chute is provided with an opening at a lower end thereof, and the reject container is positioned below the opening.

9. The valve guide size detection device according to claim 7, wherein the good discharge mechanism comprises an inclined slide, a baffle plate and a pressure plate, the upper end of the inclined slide is close to the rotary table to receive the valve guide pushed out from the rotary table by the push rod, the baffle plate is installed on two sides of the inclined slide, the distance between the baffle plate and the baffle plate is slightly larger than the length of the valve guide, and the pressure plate is installed above the inclined slide in a suspended manner, and the height of the pressure plate is set to prevent the valve guide from being overlapped.

10. The valve guide size detection device of claim 9, wherein the good discharge mechanism further comprises a thumb wheel and a drive motor for driving the thumb wheel to rotate, the thumb wheel being disposed at the discharge end of the inclined ramp.