A reject module for a filter rod making machine output end

Abstract

The application provides a rejection module for a filter rod forming machine output end, comprising an air inlet disc, a power shaft assembly, a fixed disc not rotating with the power shaft assembly, a gas distribution disc, a rejection wheel rotating synchronously with the power shaft assembly; the rejection wheel is provided with a plurality of negative pressure channels and negative pressure suction holes; the gas distribution disc is provided with an arc-shaped gas distribution groove on one side, and the arc-shaped gas distribution groove is provided with a piston cutting hole; the fixed disc is provided with a negative pressure cavity and a hollow piston mounting hole, the hollow piston mounting hole is movably provided with a hollow piston, the top of the hollow piston can extend into the piston cutting hole and release high-pressure gas, the air inlet disc is provided with a plug valve mounting hole, and the plug valve mounting hole is provided with a plug valve for plugging the hollow piston in the non-rejection state. The module can provide negative pressure for the wheel group to grab the filter rod, and can stably reject the unqualified filter rod, and mainly solves the problems of inaccurate rejection, disorder of rejected waste products and dropping of qualified filter rods of the existing equipment.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of tobacco hollow filter rod detection, in particular to a kind of rejecting module for filter rod forming machine output end. BACKGROUND

[0002] At present, in the production process of tobacco hollow filter rod, the shape quality of hollow rod is judged by mainly using optical image type inspection equipment to inspect filter rod end face, and rejecting module is used to reject filter rod of unqualified quality. The existing rejecting mode is mainly external spray pipe blowing or using fixed inner valve aperture to reject.

[0003] For example, the utility model patent application No.202020104040.1 discloses a kind of rejecting device suitable for filter rod forming machine, rejecting station and mechanical ejection mechanism are arranged in intermediate wheel, mechanical ejection mechanism is used to eject filter rod on intermediate wheel along the radial direction of intermediate wheel from adsorption groove;The position of filter rod after being ejected by mechanical ejection mechanism is set as gas blowing station, gas blowing device is arranged above gas blowing station, and the gas blowing port of gas blowing device is arranged towards gas blowing station to enable filter rod to be rejected. Although the device can perform rejecting action, the rejecting module is affected by elastic force when contacting filter rod during rejecting, and the phenomenon of disorder rod caused by collision with subsequent filter rod occurs when filter rod is bounced open, and when blowing gas is not properly adjusted, turbulent flow will affect filter rod on other positions of wheel, causing the phenomenon of disorder rod and drop rod. And the existing rejecting device using shell nesting gas cover mostly blows gas into negative pressure cavity to reject filter rod, which can reduce the negative pressure adsorption force of negative pressure cavity on hollow filter rod, and the phenomenon of disorder rod and drop rod occurs when rejecting is not accurate and negative pressure is insufficient when rejecting is not performed.

[0004] In order to solve the above problems, people have been seeking an ideal technical solution. SUMMARY

[0005] In order to achieve the above purpose, the technical scheme adopted by the present application is: a kind of rejecting module for filter rod forming machine output end, including intake disc, power shaft assembly, fixed disc not rotating with the power shaft assembly at one end of the power shaft assembly and gas distribution disc, rejecting wheel installed at one end of the power shaft assembly and synchronous with the power shaft assembly, the gas distribution disc, the fixed disc and the intake disc are sequentially arranged from inside to outside on one side of the rejecting wheel, and the gas distribution disc is rotatably connected with one side of the rejecting wheel;

[0006] A plurality of negative pressure channels are arranged in the circular array on one side of the gas distribution disc corresponding to the rejecting wheel, a plurality of filter rod grooves are arranged on the outer circumferential surface of the rejecting wheel, and a plurality of negative pressure adsorption holes communicating with the negative pressure channels are arranged in the filter rod grooves;

[0007] One side of the air distribution plate is provided with an arc-shaped air distribution groove corresponding to the negative pressure channel, and a piston cutoff hole is formed in the arc-shaped air distribution groove;

[0008] A negative pressure cavity for connecting the arc-shaped air distribution groove and the air inlet plate is formed in the fixed plate, a hollow piston mounting hole for connecting high-pressure gas is formed in the fixed plate, a hollow piston is movably mounted in the hollow piston mounting hole, and a spring is arranged outside the hollow piston; in the ejection state, the head of the hollow piston is pushed into the piston cutoff hole by the high-pressure gas, the negative pressure in the negative pressure channel connected with the piston cutoff hole is cut off, and the high-pressure gas is released into the negative pressure channel;

[0009] A plug valve mounting hole is formed in the air inlet plate, and a plug valve for sealing the hollow piston by the elastic force of the spring in the non-ejection state is arranged in the plug valve mounting hole; the air inlet plate, the fixed plate and the air distribution plate are all provided with a negative pressure release hole connected with the negative pressure channel.

[0010] Based on the above, a ejection wheel assembly fitting hole matched with the power shaft assembly is formed in the center of the ejection wheel, an air distribution plate fitting hole matched with the power shaft assembly is formed in the center of the air distribution plate, a fixed plate fitting hole matched with the power shaft assembly is formed in the center of the fixed plate, and the air distribution plate and the air inlet plate are arranged on the inner and outer sides of the fixed plate respectively by fasteners.

[0011] Based on the above, a pair of inner negative pressure distribution holes are formed in the arc-shaped air distribution groove, the negative pressure cavity is formed in the side of the fixed plate corresponding to the air inlet plate, and outer negative pressure distribution holes connected with the inner negative pressure distribution holes are formed at both ends of the negative pressure cavity.

[0012] Based on the above, a negative pressure pipeline is arranged on one side of the air inlet plate, and a negative pressure generating device is connected to the negative pressure pipeline. The negative pressure generating device can be a gas suction pump or a negative pressure tank.

[0013] Based on the above, in order to facilitate the cooperation of the hollow piston and the plug valve, the plug valve mounting hole is arranged corresponding to the hollow piston mounting hole.

[0014] Based on the above, in order to facilitate the extension of the hollow piston into the piston cutoff hole, the hollow piston mounting hole is arranged corresponding to the piston cutoff hole.

[0015] Based on the above, in order to facilitate the entry of high-pressure gas, a high-pressure air inlet blind hole connected with the hollow piston mounting hole is formed in the fixed plate, a high-pressure air inlet hole is arranged on the air inlet plate corresponding to the position of the high-pressure air inlet blind hole, and a high-pressure gas is connected to the high-pressure air inlet hole through a gas quick connector.

[0016] Based on the above, the hollow piston mounting hole is a stepped hole, the hollow piston comprises a cylindrical piston cap portion and a cylindrical piston head portion connected to one end of the cylindrical piston cap portion, the outer diameter of the cylindrical piston cap portion is larger than the outer diameter of the cylindrical piston head portion, and the spring is sleeved outside the cylindrical piston head portion.

[0017] Based on the above, the plug valve is a multi-section cylinder with gradually changing outer diameters, and one end of the plug valve is provided with a guide venting groove.

[0018] Based on the above, the power shaft assembly comprises a fixed shaft, a shaft sleeve rotatably sleeved outside the fixed shaft through a bearing, one end of the shaft sleeve is provided with a power gear, the shaft sleeve is provided with the rejecting wheel, and one end of the fixed shaft protrudes out of the shaft sleeve and is provided with the fixed disc and the valve distribution disc.

[0019] The rejecting module for the output end of the filter rod forming machine has the advantages that the valve distribution disc is arranged on the side of the rejecting wheel, a plurality of negative pressure channels and negative pressure suction holes are arranged on the side of the rejecting wheel and the filter rod groove, and an arc-shaped valve distribution groove is arranged on the valve distribution disc and communicates with the negative pressure channels, so that the corresponding position negative pressure suction holes on the filter rod groove can provide negative pressure, and the negative pressure suction force is increased compared with the negative pressure mode of the shell nested valve distribution cover.

[0020] Further, high-pressure air inlet holes are arranged on the fixed disc and the valve distribution disc, and a plug valve and a hollow piston capable of blocking negative pressure at the rejecting position under high pressure are arranged on the fixed disc and the valve distribution disc, so that the hollow piston can only block negative pressure at the piston cut-off hole of the rejecting position, and the high-pressure gas used for rejecting only enters the negative pressure hole of the rejecting wheel corresponding to the unqualified filter rod, so that the unqualified filter rod can be accurately rejected, and the qualified filter rod can be continuously gripped and transmitted by the wheel set, and the phenomenon of dropping and disordering of the hollow filter rod on both sides of the rejecting position due to insufficient negative pressure suction force is avoided.

[0021] Further, springs are arranged on the plug valve and the hollow piston, so that the hollow piston returns to the original position under the action of the springs after the high-pressure gas disappears after the rejecting is completed, on the one hand, the position is closed to prevent negative pressure leakage, and on the other hand, the negative pressure blocking of the position is ended, the negative pressure of the position is restored and maintained, and the filter rod can pass normally.

[0022] Therefore, the rejecting module can provide negative pressure for the filter rod gripped by the wheel set and accurately and stably reject the unqualified filter rod. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a schematic diagram of the installation position of the rejection module for the output end of the filter rod making machine provided by the present application.

[0024] Figure 2 is a schematic diagram of the partial structure of the rejection module for the output end of the filter rod making machine provided by the present application.

[0025] Figure 3 is a schematic diagram of the air inlet disc structure of the rejection module for the output end of the filter rod making machine provided by the present application.

[0026] Figure 4 is a schematic diagram of the cross-sectional structure of the air inlet disc of the rejection module for the output end of the filter rod making machine provided by the present application.

[0027] Figure 5 is a schematic diagram of the fixed disc structure of the rejection module for the output end of the filter rod making machine provided by the present application.

[0028] Figure 6 is a schematic diagram of the air distribution disc structure of the rejection module for the output end of the filter rod making machine provided by the present application.

[0029] Figure 7 is a schematic diagram of the rejection wheel structure of the rejection module for the output end of the filter rod making machine provided by the present application.

[0030] Figure 8 is a schematic diagram of the structure of the rejection module for the output end of the filter rod making machine provided by the present application.

[0031] Figure 9 is a schematic diagram of the partial structure of Figure 8 .

[0032] Figure 10 is a schematic diagram of the partial structure of the rejection module for the output end of the filter rod making machine provided by the present application.

[0033] Figure 11 is a schematic diagram of the power shaft assembly structure of the rejection module for the output end of the filter rod making machine provided by the present application.

[0034] Figure 12 is a schematic diagram of the plug valve structure of the rejection module for the output end of the filter rod making machine provided by the present application.

[0035] Figure 13 is a schematic diagram of the hollow piston structure of the rejection module for the output end of the filter rod making machine provided by the present application.

[0036] In the figure: 1, assembly frame; 2, detection wheel set; 3, discharge wheel set; 4, rejection wheel set; 5, negative pressure generating device; 6, air inlet disc; 7, countersunk screw; 8, high-pressure air inlet hole; 9, plug valve; 10, hollow piston; 11, spring; 12, fixed disc; 13, air distribution disc; 14, rejection wheel; 15, filter rod slot; 16, negative pressure channel; 17, rejection wheel assembly hole; 18, negative pressure suction hole; 19, negative pressure pipeline; 20, first negative pressure release hole; 21, fixed disc assembly hole; 22, negative pressure cavity; 23, outer negative pressure distribution hole; 24, hollow piston mounting hole; 25, high-pressure air blind hole; 26, second negative pressure release hole; 27, arc-shaped air distribution groove; 28, inner negative pressure distribution hole; 29, third negative pressure release hole; 30, piston blocking hole; 31, air distribution disc assembly hole; 32, plug valve mounting hole; 33, power shaft assembly; 34, fixed shaft; 35, shaft sleeve; 36, power gear; 37, bearing; 38, cylindrical piston cap portion; 39, cylindrical piston head portion; 40, guide venting groove. DETAILED DESCRIPTION

[0037] The technical solutions of the present application are described in further detail below through specific embodiments.

[0038] Embodiment 1

[0039] The present embodiment provides a rejection module for the output end of a filter rod forming machine, as shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 , Figure 12 and Figure 13 , comprising an air inlet disc 6, a power shaft assembly 36, a fixed disc 12 mounted at one end of the power shaft assembly 36 and not rotating with the power shaft assembly, an air distribution disc 13, and a rejection wheel 14 mounted at one end of the power shaft assembly 36 and rotating synchronously with the power shaft assembly.

[0040] The air distribution disc 13, the fixed disc 12, and the air inlet disc 6 are sequentially arranged from the inside to the outside on one side of the rejection wheel 14, and the air distribution disc 13 is in rotational cooperation with one side of the rejection wheel 14.

[0041] Specifically, as shown in Figure 7 , the rejection wheel 14 has a plurality of negative pressure channels 16 corresponding to the circular array on one side of the air distribution disc 13. A plurality of filter rod slots 15 are formed on the outer circumferential surface of the rejection wheel 14, and a plurality of negative pressure suction holes 18 communicating with the negative pressure channels 16 are formed in the filter rod slots 15.

[0042] As Figure 6 shown, one side of the air distribution disc 13 is provided with an arc-shaped air distribution groove 27 corresponding to the negative pressure channel 16, and a piston blocking hole 30 is formed in the arc-shaped air distribution groove 27.

[0043] As Figure 2 and Figure 5 shown, the fixed disc 12 is provided with a negative pressure cavity 22 for connecting the arc-shaped air distribution groove 27 and the air inlet disc 6. The fixed disc 12 is provided with a hollow piston mounting hole 24 connected to the high-pressure gas. The hollow piston 10 with the head capable of extending into the piston blocking hole 30 and releasing high-pressure gas is movably mounted in the hollow piston mounting hole 24, and the hollow piston 10 is externally sleeved with a spring 11. Specifically, in the cutting state, the high-pressure gas pushes the head of the hollow piston 10 into the piston blocking hole 30, blocks the negative pressure in the negative pressure channel connected to the piston blocking hole 30, and releases the high-pressure gas into the negative pressure channel.

[0044] As Figure 3 and Figure 4 shown, the air inlet disc 6 is provided with a plug valve mounting hole 32. The plug valve 9 for plugging the hollow piston 10 in the non-cutting state is arranged in the plug valve mounting hole 32. The air inlet disc 6, the fixed disc 12 and the air distribution disc 13 are all provided with negative pressure release holes connected to the negative pressure channel 16.

[0045] Specifically, in order to facilitate the distinction, the air inlet disc 6 is provided with a first negative pressure release hole 20, the fixed disc 12 is provided with a second negative pressure release hole 26, and the air distribution disc 13 is provided with a third negative pressure release hole 29. When the negative pressure channel 16 on the cutting wheel 14 rotates to the position relative to the first negative pressure release hole 20, the second negative pressure release hole 26 and the third negative pressure release hole 29, the negative pressure disappears, and the filter rods adsorbed on the filter rod groove 15 are transferred to the subsequent discharge wheel set 3 under the action of the negative pressure of the subsequent wheel groove.

[0046] In order to be fixed firmly, the air distribution disc 13 and the air inlet disc 6 are arranged on the inner and outer sides of the fixed disc 12 by fixed screws and countersunk screws 7.

[0047] Specifically, as Figure 6 shown, a pair of inner negative pressure distribution holes 28 are formed in the arc-shaped air distribution groove 27, and the fixed disc 12 is provided with the negative pressure cavity 22 corresponding to one side of the air inlet disc 6. The two ends of the negative pressure cavity 22 are provided with outer negative pressure distribution holes 23 connected to the inner negative pressure distribution holes 28.

[0048] One side of the air inlet disc 6 is provided with a negative pressure pipeline 19 connected to a negative pressure generating device 5. The negative pressure generating device 5 can be an air suction pump or a negative pressure tank.

[0049] In order to facilitate the cooperation of the hollow piston 10 and the plug valve 9, the plug valve mounting hole 32 is arranged corresponding to the hollow piston mounting hole 24. In order to facilitate the hollow piston 10 to extend into the piston cutoff hole 30, the hollow piston mounting hole 24 is arranged corresponding to the piston cutoff hole 30.

[0050] As shown in Figure 5 and Figure 6 In order to facilitate the high-pressure gas to enter, the fixed disc 12 is provided with a high-pressure gas inlet blind hole 25 which is in communication with the hollow piston mounting hole 24, and the gas inlet disc 6 is provided with a high-pressure gas inlet hole 8 corresponding to the position of the high-pressure gas inlet blind hole 25. The high-pressure gas inlet hole 8 is externally connected with high-pressure gas through a gas path quick connector.

[0051] Specifically, as shown in Figure 12 and Figure 13 The hollow piston mounting hole 24 is a stepped hole, and the hollow piston 10 includes a cylindrical piston cap portion 38 and a cylindrical piston head portion 39 connected to one end of the cylindrical piston cap portion 38. The outer diameter of the cylindrical piston cap portion 38 is larger than the outer diameter of the cylindrical piston head portion 39. The spring 11 is sleeved outside the cylindrical piston head portion 39. The plug valve 9 is a multi-segment cylinder with gradually changing outer diameters, and one end of the plug valve 9 is provided with a guide air vent groove 40.

[0052] In order to facilitate installation, the center of the removing wheel 14 is provided with a removing wheel assembly hole 17 matched with the power shaft assembly, the center of the valve distribution disc 13 is provided with a valve distribution disc assembly hole 31 matched with the power shaft assembly, and the center of the fixed disc 12 is provided with a fixed disc assembly hole 21 matched with the power shaft assembly.

[0053] As shown in Figure 11 In this embodiment, the power shaft assembly 33 includes a fixed shaft 34 and a shaft sleeve 35 rotatably sleeved outside the fixed shaft 34 through a bearing 37. One end of the shaft sleeve 35 is provided with a power gear 36, and the shaft sleeve 35 is installed with the removing wheel 14. One end of the fixed shaft 34 protrudes out of the shaft sleeve 35 and the protruding end of the fixed shaft 34 is installed with the fixed disc 12 and the valve distribution disc 13.

[0054] As shown in Figure 1As shown, the present embodiment provides a schematic diagram of the installation position of the rejection module for the output end of the filter rod forming machine. The rejection wheel set 4 is composed of the air distribution disc, the fixed disc, the air inlet disc and the rejection wheel, and is installed between the detection wheel set 2 and the discharge wheel set 3. The rejection wheel set 4, the detection wheel set 2 and the discharge wheel set 3 are jointly installed on the assembly frame 1, and are jointly communicated with the negative pressure generator. The visual defect recognition mechanism connected to the detection wheel set 2 is the existing structure, and specific reference can be made to the filter rod end face detection mechanism disclosed in CN106353329A or CN110674754A.

[0055] Specifically, the present embodiment provides a rejection module for the output end of the filter rod forming machine, and the specific working steps are as follows:

[0056] When the rejection wheel normally transfers the filter rod, the hollow piston installed in the hollow piston mounting hole is in a closed state combined with the plug valve under the action of the spring. At this time, the negative pressure is distributed by the air inlet disc into the negative pressure cavity of the fixed disc, and then the negative pressure is distributed by the fixed disc into two paths to the air distribution disc. The air distribution disc is provided with an arc-shaped air distribution groove on the side opposite to the rejection wheel, which is used to distribute the negative pressure to the negative pressure passage at the corresponding position angle on the side of the rejection wheel. The negative pressure passage is communicated with a plurality of negative pressure suction holes provided on the filter rod groove, so that the rejection wheel can smoothly grasp and transfer the filter rod.

[0057] When the rejection action is needed, high-pressure gas is supplied to the high-pressure air inlet hole of the air inlet disc, and then the high-pressure gas enters the high-pressure air blind hole of the fixed disc and the hollow piston mounting hole. The high-pressure gas changes the closed state of the hollow piston and the plug valve, and drives the hollow piston to move towards the air distribution disc, so that it moves into the piston cut-off hole provided on the arc-shaped air distribution groove. The hollow piston cuts off the negative pressure of the negative pressure passage at this position, and the high-pressure gas is injected into the negative pressure passage at the position corresponding to the piston cut-off hole through the guide air groove of the plug valve head and the inner hole of the hollow piston. At this time, the negative pressure suction hole corresponding to the unqualified filter rod on the rejection wheel changes from negative pressure to positive pressure, while the suction hole of the adjacent filter rod groove is still under negative pressure. Therefore, the unqualified filter rod is accurately rejected, while the qualified filter rod is still unaffected. And due to the rapid action of the gas flow, the direction is the normal position of the rejection wheel, the filter rod separates quickly and stably, and will not collide with other filter rods to cause the phenomenon of disorderly rods.

[0058] Since the hollow piston only blocks the negative pressure at this position, negative pressure is maintained on both sides of the blocked position, and the qualified filter rod can be continuously grasped and transferred by the wheel set.

[0059] After the rejection action ends, the high-pressure gas disappears, and the hollow piston returns to the original position under the action of the spring. The hollow piston and the plug valve are combined to restore the closed state under the action of the spring, the negative pressure blocking ends, the negative pressure at this position is restored and can be stably maintained, so that the filter rod can pass normally.

[0060] It should be noted that the above examples are only used to illustrate the technical solutions of the present application but not to limit the present application; although the present application has been described in detail with reference to the preferred embodiments, it is understood by those skilled in the art that the specific embodiments of the present application can be modified or some technical features can be replaced by equivalent ones; without departing from the spirit of the technical solutions of the present application, all of which should be covered in the technical solution range of the present application claimed by the present application.

Claims

1. A reject module for the output end of a filter rod making machine, characterised in that: The application relates to a cigarette removing device, which comprises an air inlet disc, a power shaft assembly, a fixed disc mounted at one end of the power shaft assembly and not rotating with the power shaft assembly, a valve disc, and a removing wheel mounted at one end of the power shaft assembly and rotating synchronously with the power shaft assembly; the valve disc, the fixed disc and the air inlet disc are sequentially arranged on one side of the removing wheel from inside to outside. A plurality of negative pressure channels are arranged in a circular array on one side of the valve disc corresponding to the removing wheel; a plurality of filter rod grooves are formed on the outer circumferential surface of the removing wheel; and a plurality of negative pressure suction holes are formed in the filter rod grooves and connected with the negative pressure channels. An arc-shaped valve groove is formed on one side of the valve disc corresponding to the negative pressure channels; and a piston cutting hole is formed in the arc-shaped valve groove. A negative pressure cavity is formed in the fixed disc and connected with the arc-shaped valve groove and the air inlet disc; a hollow piston mounting hole is formed in the fixed disc and connected with high-pressure gas; a hollow piston is movably arranged in the hollow piston mounting hole; and a spring is arranged outside the hollow piston. A plug valve mounting hole is formed in the air inlet disc; a plug valve is arranged in the plug valve mounting hole and used for sealing the hollow piston by the elastic force of the spring in a non-removing state; and a negative pressure release hole connected with the negative pressure channels is arranged on the air inlet disc, the fixed disc and the valve disc.

2. A reject module for the output end of a filter rod making machine according to claim 1 characterised in that: A removing wheel assembly hole is formed in the center of the removing wheel and matched with the power shaft assembly; a valve disc assembly hole is formed in the center of the valve disc and matched with the power shaft assembly; a fixed disc assembly hole is formed in the center of the fixed disc and matched with the power shaft assembly; and the valve disc and the air inlet disc are arranged on the inner and outer sides of the fixed disc through fasteners.

3. A reject module for the output end of a filter rod making machine according to claim 1 or 2, characterised in that: A pair of inner negative pressure distribution holes are formed in the arc-shaped valve groove; the negative pressure cavity is formed on one side of the fixed disc corresponding to the air inlet disc; and outer negative pressure distribution holes are formed at the two ends of the negative pressure cavity and connected with the inner negative pressure distribution holes.

4. A reject module for the output end of a filter rod making machine according to claim 3, characterised in that: A negative pressure pipeline is arranged on one side of the air inlet disc; and a negative pressure generating device is connected with the negative pressure pipeline.

5. A reject module for the output end of a filter rod making machine according to claim 1 or 2, characterised in that: The plug valve mounting hole is arranged corresponding to the hollow piston mounting hole.

6. A reject module for the output end of a filter rod making machine according to claim 1, characterised in that: The hollow piston mounting hole is arranged corresponding to the piston cutting hole.

7. A reject module for the output end of a filter rod making machine according to claim 6, characterised in that: A high-pressure air inlet blind hole connected with the hollow piston mounting hole is formed in the fixed disc; a high-pressure air inlet hole is arranged on the air inlet disc corresponding to the position of the high-pressure air inlet blind hole; and high-pressure gas is connected with the high-pressure air inlet hole through a gas quick connector.

8. A reject module for the output end of a filter rod making machine according to claim 7, characterised in that: The hollow piston mounting hole is a stepped hole; the hollow piston comprises a cylindrical piston cap portion and a cylindrical piston head portion connected with one end of the cylindrical piston cap portion; the outer diameter of the cylindrical piston cap portion is larger than the outer diameter of the cylindrical piston head portion; and the spring is arranged outside the cylindrical piston head portion.

9. A reject module for the output end of a filter rod making machine according to claim 8, characterised in that: The plug valve is a multi-segmented cylinder with gradually changed outer diameters; and a guide air groove is arranged at one end of the plug valve.

10. A reject module for the output end of a filter rod making machine according to claim 1 or 2, characterised in that: The power shaft assembly comprises a fixed shaft, a shaft sleeve rotatingly sleeved outside the fixed shaft through a bearing, one end of the shaft sleeve being provided with a power gear, the shaft sleeve being provided with the removing wheel, one end of the fixed shaft extending out of the shaft sleeve and the extending end of the fixed shaft being provided with the fixed disc and a valve distribution disc.

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