Waste gas purification device for printed matter production

Abstract

The invention discloses a waste gas purification device for presswork production, and relates to the technical field of presswork production, the waste gas purification device comprises a bottom plate, a liquid storage box is mounted above the bottom plate through screws, a third-section tank body is mounted on one side of the liquid storage box through screws, a second-section tank body is mounted above the third-section tank body through bolts, and the second-section tank body is mounted above the third-section tank body through bolts; the waste gas purification device for printed matter production is provided with a plurality of layers for waste gas purification, gas does not reach the standard after being detected, the waste gas purification device can be used for waste gas purification, the waste gas purification device can be used for waste gas purification, the waste gas purification device can be used for waste gas purification, and the waste gas purification device can be used for waste gas purification. An independent channel is arranged for secondary purification, interaction between unfiltered gas and purified gas is avoided, meanwhile, an auxiliary material changing structure is arranged in the tower, internal filler can be conveniently and manually replaced, an assembly which is integrally and conveniently pulled out is adopted as a replacement object of a box body, and an internal adsorption assembly can be conveniently replaced.

Description

Technical Field

[0001] The invention relates to the technical field of printed matter production, in particular to an exhaust gas purification device used for printed matter production. Background Art

[0002] Printed products are printed products, and are the general term for various finished products produced using printing technology. In daily life, people come into contact with newspapers, books, magazines, maps, posters, advertisements, envelopes, letterheads, trademarks, business cards, invitations, banknotes, greeting cards, desk calendars, wall calendars, various cards, packaging boxes, circuit boards, etc., all of which belong to the category of printed products. Printed products are almost everywhere in people's clothing, food, housing, and transportation. Everywhere you look, there are printed products of all sizes, and they are closely related to people's lives.

[0003] The current exhaust gas purification device still has the following problems:

[0004] 1. The gas from the printed matter is adsorbed and filtered by activated carbon. The filtered and purified gas is discharged to the inspection device. The gas that meets the standard is discharged, and the gas that does not meet the standard is returned to the initial filter port. The unfiltered first gas and the gas that does not meet the standard are intertwined, which may easily lead to the re-testing of the test gas still not meeting the standard. It needs to be transmitted back to the initial port for multiple filtering;

[0005] 2. When the printed matter is introduced into the purification device, the sewage in the existing single-layer evolution tower will be sprayed on the unpurified gas. The waste gas will have the opportunity to volatilize and the particulate matter cannot be purified completely. It needs to be circulated many times. The adsorbent in the single-layer purification tower is saturated, and the entire waste gas purification system will be interrupted. The adsorbent needs to be replaced, thereby increasing the frequency of replacement;

[0006] 3. The purification adsorbent for printed materials is installed above the tower or inside the box. The multi-layer adsorbent in the box needs to be adjusted several times for replacement due to the limited internal space. The adsorbent in the tower is generally a filling item. Due to the limitation of the internal space, the internal plate layer is flat and needs to be manually picked up one by one. It takes a long time to replace it with one action, resulting in low replacement time and efficiency. Summary of the invention

[0007] In view of the deficiencies in the prior art, the present invention provides an exhaust gas purification device for printed product production, which solves the problem raised in the above background technology that due to limited internal space, the position needs to be adjusted multiple times for replacement; the adsorbent in the tower is generally a filling item, which is limited by the internal space and the internal plate layer is flat. It needs to be manually taken one by one, which makes it inconvenient to take and replace the filling item.

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: an exhaust gas purification device for printed matter production, comprising a bottom plate, a liquid storage box is installed on the top of the bottom plate by screws, a third tank body is installed on one side of the liquid storage box by screws, a second tank body is installed on the top of the third tank body by bolts, a first tank body is installed on the top of the second tank body by bolts, a second liquid pump is provided on one side of the liquid storage box, a filter box is connected to the rear of the second liquid pump by a pipeline, a main control cabinet is installed on the top of the bottom plate by screws, an air intake check valve is provided on the top of the first tank body, and an air intake pneumatic regulating valve is provided on the top of the air intake check valve. A purification pneumatic regulating valve is provided on one side of the air intake pneumatic regulating valve, a reflux pneumatic regulating valve is provided on one end of the pipe connecting the air intake pneumatic regulating valve and the purification pneumatic regulating valve, a reflux check valve is provided on the other end of the reflux pneumatic regulating valve, a purification check valve is provided on the other end of the purification pneumatic regulating valve, a detection head is installed above the pipe connecting the air intake pneumatic regulating valve and the purification pneumatic regulating valve by screws, a VOC gas detector is connected to the detection head by cables, an exhaust column is installed above the bottom plate by screws, a purified gas outlet is provided on one side of the top end of the exhaust column, and a lower side of the exhaust column is installed on the air intake port of the third fan by screws;

[0009] A second fan is installed on one side of the filter box by screws, a first fan is connected to a pipe on one side of the filter box, a third control valve is threadedly installed on the front hole groove of the filter box, a filtered liquid outlet pipe is threadedly installed on the front of the third control valve, a partition is welded inside the filter box, a first connecting pipe is installed on one side of the partition by screws, a first nozzle is threadedly installed below the first connecting pipe, a limiting groove is installed on the other side of the partition by screws, activated carbon is clamped inside the limiting groove, a limiting plate is attached to one side of the limiting groove, a first spring is glued to one side of the limiting plate, a pull plate is attached to the inside of the filter box, foam ceramics are attached to one side of the pull plate, an exhaust gas inlet and a detection gas discharge port are welded on the other side of the filter box, and a detection gas discharge port is provided on one side of the exhaust gas inlet;

[0010] A second connecting pipe is inserted into the interior of the first tank body, a second nozzle is threadedly connected to the lower part of the second connecting pipe, a top cover is screwed on the upper part of the first tank body, an inspection port is provided on one side of the top cover, and an observation window is provided on one side of the first tank body;

[0011] The outer wall of the second tank body is provided with a detection door plate by a hinge, the inner hole groove of the detection door plate is threadedly connected with a fixing screw, the inner part of the second tank body is provided with a second integrally formed grille plate by screws, the upper part of the second integrally formed grille plate is provided with a second spring by screws, the upper part of the second integrally formed grille plate is provided with a first integrally formed grille plate by screws, the lower part of the first integrally formed grille plate is provided with a slide plate by screws, the inner hole groove of the slide plate is slidably connected with a slide bar, a hydraulic rod is provided with a pin shaft at the lower middle part of the first integrally formed grille plate, a PP filler multifaceted ball is attached to the upper part of the first integrally formed grille plate, a proximity switch is plugged into one side of the first integrally formed grille plate, and a pressure sensor is provided with a screw on the outer wall of the second tank body;

[0012] A fourth control valve is threadedly mounted on the outer wall hole groove of the third tank body, a drug discharge port is threadedly mounted on one side of the fourth control valve, a third connecting pipe is arranged above the third tank body, and a third nozzle is threadedly mounted below the third connecting pipe.

[0013] Optionally, a first liquid pump is installed on the top of the liquid storage box by screws, a water level control sensor is inserted into the interior of the liquid storage box, a first control valve and a second control valve are threadedly installed in the front hole groove of the liquid storage box, a second control valve is provided on one side of the first control valve, a liquid inlet pipe is threadedly installed on one side of the first control valve, a liquid storage outlet pipe is threadedly installed on one side of the second control valve, and the first liquid pump is provided with two pipe connections, and the first liquid pump is connected to the liquid storage box and the first liquid pump is connected to a third connecting pipe, and the third connecting pipe is connected to the second connecting pipe.

[0014] Optionally, the second liquid pump is provided with two pipe connections, and the second liquid pump is connected to the liquid storage box and the second liquid pump is connected to the first connecting pipe that passes through the filter box.

[0015] Optionally, the limit groove is a "U"-shaped groove, and the internal structure of the limit groove fits tightly with the outer wall of the bottom end of the activated carbon. The limit groove is composed of two groups of vertically distributed groups of the same size. There are several "U"-shaped grooves horizontally inside the limit groove, and one side of the limit groove fits tightly with the limit plate. The limit plate forms an elastic structure through the first spring. Two first springs are vertically distributed on one side of the limit plate, and the other end of the first spring is glued to the inner wall of the filter box, and the filter box is divided into two spaces by the partition. The partition and the inner wall of the filter box are connected to a straight plate, and two are horizontally distributed at both ends of the foam ceramic. The pull plate is fitted on the top of the straight plate, and foam ceramics are provided in the middle of the pull plate. The pull plate is a "U"-shaped groove, and several first nozzles are horizontally arranged below the first connecting pipe.

[0016] Optionally, a pipeline is provided on the top of the top cover, and the top cover is connected to the air intake check valve and the air intake check valve is connected to the air intake pneumatic regulating valve, and the air intake pneumatic regulating valve is connected to the purification pneumatic regulating valve and the purification pneumatic regulating valve is connected to the purification check valve, and the pipeline between the air intake pneumatic regulating valve and the reflux pneumatic regulating valve is connected to the reflux pneumatic regulating valve and the reflux pneumatic regulating valve is connected to the reflux check valve, and the reflux check valve is connected to the detection gas exhaust port.

[0017] Optionally, two arc grooves are provided inside the slide plate, and the external structural dimensions of the slide rod are slidably fitted in the arc grooves of the slide plate, and slide rods and slide plates are provided on both sides of the slide plate, and the slide rod is inserted into the inner wall of the second tank section.

[0018] Optionally, the external structural dimensions of the first integrally formed grid plate are smaller than those of the second integrally formed grid plate, a second spring is provided between the first integrally formed grid plate and the second integrally formed grid plate, and a hydraulic rod is obliquely installed between the first integrally formed grid plate and the second integrally formed grid plate.

[0019] Optionally, a plurality of cables are provided on one side of the main control cabinet, and the main control cabinet is connected to the first liquid pump and to the water level control sensor, and the main control cabinet is connected to the second liquid pump, and the main control cabinet is connected to the first fan, the second fan, and the third fan, and the main control cabinet is connected to the VOC gas detector and to the detection head, and the main control cabinet is connected to the air intake pneumatic regulating valve, the reflux pneumatic regulating valve, and the purification pneumatic regulating valve.

[0020] Optionally, a plurality of cables are provided on one side of the main control cabinet, and the main control cabinet is connected to the pressure sensor, the pressure sensor is connected to the hydraulic rod, and the proximity switch is connected to the pressure sensor. The inner wall of the second tank body is provided with two induction plates for use with the proximity switch.

[0021] Optionally, the first tank section, the second tank section and the third tank section are vertically stacked and distributed, the first tank section and the third tank section are both installed with a second connecting pipe and a third connecting pipe, and the interiors of the second tank section and the third tank section are both provided with internal parts consistent with a first integrally molded grille plate, a second integrally molded grille plate, a proximity switch, a second spring, a slide plate and a slide rod.

[0022] The present invention provides an exhaust gas purification device for printed matter production, which has the following beneficial effects:

[0023] The waste gas purification device used for the production of printed materials is provided with components such as an intake check valve, an intake pneumatic regulating valve, a purification pneumatic regulating valve, a reflux pneumatic regulating valve, and a reflux check valve, forming a complete gas circulation path. After the gas enters through the intake check valve, it is detected by a detection head and a VOC gas detector. If it meets the standard, it is discharged from the purified gas outlet through the purification pneumatic regulating valve. If it does not meet the standard, it is returned to the detection gas discharge port through the reflux pneumatic regulating valve and the reflux check valve for re-filtration, effectively avoiding the problem of multiple filtrations required for non-standard detection due to the interweaving of unfiltered gas and non-standard gas. Through precise detection and an independent circulation path, it is ensured that the non-standard gas can accurately return to the initial filter port for re-processing without mixing with the newly entered unfiltered gas, thereby improving the filtration efficiency and detection accuracy and reducing the number of multiple cycle filtrations.

[0024] The waste gas purification device for the production of printed materials adopts a first tank body, a second tank body and a third tank body which are vertically stacked and distributed, and the second tank body and the third tank body are provided with a first integrally formed grid plate, a second integrally formed grid plate, a proximity switch, a second spring, a slide plate, a slide rod and other parts. The multi-layer structure design inside the tank body and the synergistic effect of various components provide more sufficient space and conditions for gas purification. Compared with a single-layer purification tower, the multi-layer tank body structure increases the contact area and time between the gas and the purification medium, improves the purification effect, can more effectively deal with organic volatilization and particulate matter in the waste gas, and reduces the number of cycles. At the same time, the synergistic effect of the internal parts of each tank body, such as the first integrally formed grid plate, the second integrally formed grid plate, etc., contributes to the uniform distribution and sufficient purification of the gas, reduces the saturation rate of the adsorbent, and reduces the replacement frequency of the adsorbent.

[0025] In the waste gas purification device for the production of printed materials, a partition is arranged in the filter box to divide it into two spaces, a limiting groove is installed on one side for clamping activated carbon, a limiting plate with an elastic structure formed by a first spring is provided on one side of the limiting groove, and a pulling plate and foam ceramics are provided on the other side, and multiple first nozzles are arranged under the first connecting pipe. The limiting groove and the elastic limiting plate design of the activated carbon can not only ensure the stable installation of the activated carbon, but also facilitate the operation when replacement is required. The arrangement of the foam ceramics and multiple nozzles improves the filtering effect, so that the gas can be more fully filtered and purified in the filter box, and the generation of substandard gas is reduced, thereby alleviating the problem of the interlacing of unfiltered gas and substandard gas, and also reduces the saturation speed of the adsorbent to a certain extent, reducing the replacement frequency.

[0026] The waste gas purification device used for the production of printed materials is provided with a tilting device for the adsorbed filling spheres, which can facilitate the replacement of the internal filling spheres. The first one-piece grille plate is lifted up by the output end shaft of the hydraulic rod, so that the slide bar under the first one-piece grille plate moves along the slideway on the slide bar, and the second spring under the first one-piece grille plate provides auxiliary support. The proximity switch of the first one-piece grille plate can detect two points, which is convenient for transmitting a signal to the pressure sensor when the tilt and level are reached, and the pressure sensor transmits the signal back to the main control cabinet, so that the main control cabinet can connect the pressure sensor to control the hydraulic rod to stop moving or implement the next step of movement. When the first one-piece grille plate is tilted, the PP filler multi-faceted balls are poured out for easy replacement.

[0027] The exhaust gas purification device used for printing production has a main control cabinet connected to multiple components through cables, such as the first liquid extraction pump, the second liquid extraction pump, various fans, VOC gas detectors, various regulating valves and pressure sensors, etc., to achieve centralized control and monitoring of the entire system. Through automatic control, the operating status of the system can be monitored in real time, and the gas flow, pressure and other parameters can be accurately adjusted according to the detection data to ensure that the various components work together to improve the purification efficiency and stability. For example, when the VOC gas detector detects that the gas does not meet the standard, the main control cabinet can automatically control the reflux pneumatic regulating valve to open, so that the gas returns to the filter, avoiding the untimely and error of manual operation, thereby reducing the problems of multiple gas circulation filtration and frequent saturation of adsorbents caused by unstable system operation, while also improving the operating efficiency and reliability of the entire system and reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the left structure in the invention;

[0029] Figure 2 It is a schematic diagram of the right side structure in the invention;

[0030] Figure 3 It is a schematic diagram of the structure above the liquid storage box in the invention;

[0031] Figure 4 It is a structural schematic diagram of one side of the filter box in the invention;

[0032] Figure 5 It is a schematic diagram of the internal structure of the filter box in the invention;

[0033] Figure 6 It is a schematic diagram of the internal structure of the first tank in the invention;

[0034] Figure 7 It is a schematic diagram of the explosion structure of the second tank in the invention;

[0035] Figure 8This is a schematic diagram of the internal structure of the third tank body in the invention.

[0036] In the figure: 1, bottom plate; 2, liquid storage box; 201, second control valve; 202, liquid storage outlet pipe; 203, first control valve; 204, liquid inlet pipe; 205, first liquid pump; 206, water level control sensor; 3, filter box; 301, first fan; 302, second fan; 303, third control valve; 304, filter outlet pipe; 305, limit plate; 306, activated carbon; 307, limit groove; 308, partition; 309, pull plate; 310, first connecting pipe; 311, first nozzle; 312, exhaust gas inlet; 313, detection gas discharge port; 314, foam ceramic; 315, first spring; 4, first tank body; 401, inspection port; 402, top cover; 403, second connecting pipe; 404, observation window; 405, second nozzle; 5, second tank body; 501. Slide plate; 502. Slide rod; 503. Hydraulic rod; 504. PP filler multi-faceted ball; 505. First integrally formed grid plate; 506. Proximity switch; 507. Second integrally formed grid plate; 508. Detection door plate; 509. Fixing screw; 510. Pressure sensor; 511. Second spring; 6. Third tank body; 601. Third connecting pipe; 602. Third nozzle; 603. Fourth control valve; 604. Drug discharge port; 7. Reflux check valve; 8. Reflux pneumatic regulating valve; 9. Purification check valve; 10. Purification pneumatic regulating valve; 11. Exhaust column; 12. VOC gas detector; 13. Second liquid extraction pump; 14. Air intake check valve; 15. Air intake pneumatic regulating valve; 16. Detection head; 17. Purification gas outlet; 18. Third fan; 19. Main control cabinet. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0038] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] See also Figures 1 to 8 The present invention provides a technical solution: an exhaust gas purification device for printed matter production, comprising a bottom plate 1, a liquid storage box 2 is installed on the top of the bottom plate 1 by screws, a third tank body 6 is installed on one side of the liquid storage box 2 by screws, a second tank body 5 is installed on the top of the third tank body 6 by bolts, a first tank body 4 is installed on the top of the second tank body 5 by bolts, a second liquid pump 13 is provided on one side of the liquid storage box 2, a filter box 3 is connected to the rear of the second liquid pump 13 by a pipeline, a main control cabinet 19 is installed on the top of the bottom plate 1 by screws, an air intake check valve 14 is provided on the top of the first tank body 4, an air intake pneumatic regulating valve 15 is provided on the top of the air intake check valve 14, and an air intake pneumatic regulating valve 15 is provided on the top of the air intake pneumatic regulating valve 15. A purification pneumatic regulating valve 10 is provided on one side, a reflux pneumatic regulating valve 8 is provided on one end of the pipe connecting the air intake pneumatic regulating valve 15 and the purification pneumatic regulating valve 10, a reflux check valve 7 is provided on the other end of the reflux pneumatic regulating valve 8, a purification check valve 9 is provided on the other end of the purification pneumatic regulating valve 10, a detection head 16 is installed above the pipe connecting the air intake pneumatic regulating valve 15 and the purification pneumatic regulating valve 10 by screws, a VOC gas detector 12 is connected to the detection head 16 by a cable, an exhaust column 11 is installed above the bottom plate 1 by screws, a purified gas outlet 17 is provided on one side of the top end of the exhaust column 11, and the lower side of the exhaust column 11 is installed on the air intake of the third fan 18 by screws.

[0041] A second fan 302 is installed on one side of the filter box 3 by screws, a first fan 301 is connected to a pipe on one side of the filter box 3, a third control valve 303 is threadedly installed on the front hole groove of the filter box 3, a filtered liquid outlet pipe 304 is threadedly installed on the front of the third control valve 303, a partition 308 is welded inside the filter box 3, a first connecting pipe 310 is installed on one side of the partition 308 by screws, a first nozzle 311 is threadedly installed below the first connecting pipe 310, and a first nozzle 311 is threadedly installed on the bottom of the partition 308. A limiting groove 307 is installed on the other side by screws, and activated carbon 306 is clamped inside the limiting groove 307, and a limiting plate 305 is attached to one side of the limiting groove 307, and a first spring 315 is glued to one side of the limiting plate 305. A pull plate 309 is attached to the inside of the filter box 3, and a foam ceramic 314 is attached to one side of the pull plate 309. An exhaust gas inlet 312 and a detection gas discharge port 313 are welded on the other side of the filter box 3, and a detection gas discharge port 313 is provided on one side of the exhaust gas inlet 312;

[0042] A second connecting pipe 403 is inserted into the interior of the first tank body 4, a second nozzle 405 is threadedly connected to the lower part of the second connecting pipe 403, a top cover 402 is screwed on the upper part of the first tank body 4, a maintenance port 401 is provided on one side of the top cover 402, and an observation window 404 is provided on one side of the first tank body 4;

[0043] The outer wall of the second tank body 5 is hingedly mounted with a detection door plate 508, the inner hole groove of the detection door plate 508 is threadedly connected with a fixing screw 509, the inner part of the second tank body 5 is screwed with a second integrally formed grille plate 507, the upper part of the second integrally formed grille plate 507 is screwed with a second spring 511, the upper part of the second integrally formed grille plate 505 is screwed with a first integrally formed grille plate 505, the lower part of the first integrally formed grille plate 505 is screwed with a slide plate 501, the inner hole groove of the slide plate 501 is slidably connected with a slide bar 502, the lower middle part of the first integrally formed grille plate 505 is mounted with a hydraulic rod 503 through a pin shaft, the upper part of the first integrally formed grille plate 505 is attached with a PP filler multifaceted ball 504, one side of the first integrally formed grille plate 505 is plugged with a proximity switch 506, and the outer wall of the second tank body 5 is screwed with a pressure sensor 510;

[0044] A fourth control valve 603 is threadedly installed in the outer wall hole groove of the third tank body 6, a drug discharge port 604 is threadedly installed on one side of the fourth control valve 603, a third connecting pipe 601 is provided above the third tank body 6, and a third nozzle 602 is threadedly installed below the third connecting pipe 601.

[0045] In this embodiment, Figure 1 , Figure 2 , Figure 3 , Figure 6 and Figure 8 As shown, a first liquid pump 205 is installed on the top of the liquid storage box 2 by screws, a water level control sensor 206 is inserted into the interior of the liquid storage box 2, a first control valve 203 and a second control valve 201 are installed by threads in the front hole groove of the liquid storage box 2, a second control valve 201 is provided on one side of the first control valve 203, a liquid inlet pipe 204 is threadedly installed on one side of the first control valve 203, a liquid storage outlet pipe 202 is threadedly installed on one side of the second control valve 201, and the first liquid pump 205 is provided with two pipeline connections, and the first liquid pump 205 is connected to the liquid storage box 2 and the first liquid pump 205 is connected to the third connecting pipe 601, and the third connecting pipe 601 is connected to the second connecting pipe 403; the liquid storage box 2 is used to store disinfection and purification liquids and purification drug liquids, etc., the first A liquid pump 205 extracts the liquid in the liquid storage box 2 and transports it to the third connecting pipe 601 and the second connecting pipe 403, providing a liquid source for the disinfection and purification process in the tank body. The first liquid pump 205 is provided with two pipe connections, which are respectively connected to the liquid storage box 2 and the third connecting pipe 601, and the third connecting pipe 601 is connected to the second connecting pipe 403. Through the power of the pump, the liquid is extracted from the liquid storage box 2 and transported to the nozzle for spraying to disinfect and purify the gas. The water level control sensor 206 in the liquid storage box 2 can detect the liquid level and transmit the information to the main control cabinet 19 so as to replenish and purify the drug liquid in time. The first control valve 203 and the second control valve 201 respectively control the opening and closing of the liquid inlet pipe 204 and the liquid storage outlet pipe 202 to realize the liquid inlet and discharge operations.

[0046] In this embodiment, Figure 1 and Figure 5 As shown, the second liquid pump 13 is provided with two pipe connections, and the second liquid pump 13 is connected to the liquid storage box 2 and the second liquid pump 13 is connected to the first connecting pipe 310 which runs through the filter box 3; the second liquid pump 13 extracts the purification drug in the liquid storage box 2 and transports it to the first connecting pipe 310 of the filter box 3, providing drug support for the second purification of the exhaust gas. The second liquid pump 13 is provided with two pipe connections, which are respectively connected to the liquid storage box 2 and the first connecting pipe 310 which runs through the filter box 3. Through the action of the pump, the purification drug is transported to the first connecting pipe 310, sprayed on the foam ceramic 314 by the first nozzle 311, and the exhaust gas is purified for the second time.

[0047] In this embodiment, Figure 1 , Figure 2 , Figure 4 and Figure 5As shown, the limiting groove 307 is a "U"-shaped groove, and the internal structure of the limiting groove 307 is closely fitted with the outer wall of the bottom end of the activated carbon 306. The limiting groove 307 is composed of two groups of vertically distributed with the same size. There are several "U"-shaped grooves horizontally inside the limiting groove 307, and one side of the limiting groove 307 is closely fitted with the limiting plate 305. The limiting plate 305 forms an elastic structure through the first spring 315. Two first springs 315 are vertically distributed on one side of the limiting plate 305, and the other end of the first spring 315 is glued to The inner wall of the filter box 3 is divided into two spaces by a partition 308. The partition 308 and the inner wall of the filter box 3 are connected with a straight plate, two horizontally distributed at both ends of the foam ceramic 314, and the pull plate 309 is attached to the top of the straight plate. The middle part of the pull plate 309 is provided with a foam ceramic 314. The pull plate 309 is a "U"-shaped groove, and a plurality of first nozzles 311 are horizontally arranged below the first connecting pipe 310; the filter box 3 performs preliminary filtering on the exhaust gas to remove some impurities in the exhaust gas, and the limit groove 30 7. The structure of the limit plate 305 and the first spring 315 facilitates the replacement of the activated carbon 306. The structure of the pull plate 309 and the foam ceramic 314 facilitates the replacement of the foam ceramic 314. The foam ceramic 314 is attached to the pull plate 309. The pull plate 309 is attached to the top of the straight plate connecting the partition 308 and the inner wall of the filter box 3. When replacing the foam ceramic 314, the pull plate 309 is pulled vertically upward to bring out the foam ceramic 314. The limit groove 307 is a "U"-shaped groove and is tightly attached to the outer wall of the bottom end of the activated carbon 306. The positioning groove 307 is composed of two groups of vertically distributed grooves of the same size, with a plurality of "U"-shaped grooves inside. The limiting plate 305 forms an elastic structure through the first spring 315 to limit and fix the activated carbon 306 to a certain extent, so that the limiting groove 307 can be buckled down when replacing the activated carbon 306. The plurality of first nozzles 311 horizontally arranged under the first connecting pipe 310 can spray the purification drug to purify the exhaust gas for the second time. The filtered liquid can be discharged through the filtered liquid outlet pipe 304 by opening the third control valve 303.

[0048] In this embodiment, Figure 1 , Figure 2 , Figure 5 and Figure 6As shown, a pipeline is provided on the top of the top cover 402 to be connected through, and the top cover 402 is connected to the air intake check valve 14 and the air intake check valve 14 is connected to the air intake pneumatic regulating valve 15, and the air intake pneumatic regulating valve 15 is connected to the purification pneumatic regulating valve 10 and the purification pneumatic regulating valve 10 is connected to the purification check valve 9, and the pipeline between the air intake pneumatic regulating valve 15 and the return pneumatic regulating valve 8 is connected to the return pneumatic regulating valve 8 and the return pneumatic regulating valve 8 is connected to the return check valve 7, and the return check valve 7 is connected to the detection gas discharge port 313; the top cover 402 is connected to the air intake check valve 14, the air intake pneumatic regulating valve 15, the purification pneumatic regulating valve 10, the return pneumatic regulating valve 8 and other components to realize the flow control of the exhaust gas and the regulation of the purification process, and the exhaust gas After preliminary filtration by the filter box 3, the exhaust gas enters the air intake check valve 14 from the pipe on the top of the top cover 402 to prevent gas backflow. The air intake pneumatic regulating valve 15 controls the flow rate and direction of the exhaust gas. A part of the exhaust gas can return to the front end of the filter box 3 through the reflux pneumatic regulating valve 8 and the reflux check valve 7 for a second purification, and the other part of the exhaust gas flows to the purification pneumatic regulating valve 10 and the purification check valve 9 to enter the subsequent purification process. The detection head 16 and the VOC gas detector 12 detect the exhaust gas. After the qualified gas passes through the purification pneumatic regulating valve 10 and the purification check valve 9, it is sucked in by the third fan 18 and discharged to the purified gas outlet 17 above the exhaust column 11. The gas that does not meet the standard passes through the reflux pneumatic regulating valve 8 and the reflux check valve 7 for a second purification, and the second purification is completed by the detection gas discharge port 313.

[0049] In this embodiment, Figure 1 , Figure 2 and Figure 7 As shown, two arc grooves are provided inside the slide plate 501, and the external structural dimensions of the slide bar 502 are slidably fitted in the arc grooves of the slide plate 501, and slide bars 502 and slide plates 501 are provided on both sides of the slide plate 501, and the slide bar 502 is plugged into the inner wall of the second tank body 5; the slide plate 501 and the slide bar 502 structure provide guidance and support for the movement of the first integrally formed grid plate 505, which is convenient for replacing the PP filler multifaceted ball 504 in the second tank body 5 and the third tank body 6, the slide plate 501 is provided with two arc grooves inside, and the external structural dimensions of the slide bar 502 are slidably fitted in the arc grooves of the slide plate 501, and the slide bars 502 are provided on both sides of the slide plate 501, and the slide bars 502 are plugged into the inner wall of the second tank body 5; the slide plate 501 and the slide bar 502 structure provide guidance and support for the movement of the first integrally formed grid plate 505, which is convenient for replacing the PP filler multifaceted ball 504 in the second tank body 5 and the third tank body 6, The structural dimensions slide and fit into the arc groove of the slide plate 501, and the slide bar 502 is inserted into the inner wall of the second tank 5. When the PP filler multi-faceted ball 504 needs to be replaced, the output end shaft of the hydraulic rod 503 lifts the first integrally formed grid plate 505, so that the slide plate 501 below the first integrally formed grid plate 505 moves along the slideway on the slide bar 502 to achieve the inclination of the first integrally formed grid plate 505, and the PP filler multi-faceted ball 504 is poured out for replacement, and the second spring 511 in a circle below the first integrally formed grid plate 505 provides auxiliary support.

[0050] In this embodiment, Figure 1, Figure 2 and Figure 7 As shown, the external structural dimensions of the first integrally formed grid plate 505 are smaller than those of the second integrally formed grid plate 507, and a second spring 511 is provided between the first integrally formed grid plate 505 and the second integrally formed grid plate 507, and the hydraulic rod 503 is obliquely installed between the first integrally formed grid plate 505 and the second integrally formed grid plate 507; the first integrally formed grid plate 505 cooperates with the second integrally formed grid plate 507, the second spring 511, the hydraulic rod 503, the proximity switch 506 and other components to support and facilitate replacement of the PP filler multi-faceted ball 504, and is connected to the pressure sensor 510 and the main control cabinet 19 to control the replacement process, and the first integrally formed grid plate 505 The external structure size is smaller than the second integrally formed grid plate 507, and a second spring 511 is provided between the two. The hydraulic rod 503 is installed obliquely between the first integrally formed grid plate 505 and the second integrally formed grid plate 507. When the PP filler multi-faceted ball 504 needs to be replaced, the hydraulic rod 503 lifts up the first integrally formed grid plate 505, and the second spring 511 assists in support. The proximity switch 506 on one side of the first integrally formed grid plate 505 can detect two points. When the tilt and level are reached, the signal is transmitted to the pressure sensor 510, and the pressure sensor 510 is then transmitted back to the main control cabinet 19, so that the main control cabinet 19 can connect the pressure sensor 510 to control the hydraulic rod 503 to stop moving or implement the next step of movement.

[0051] In this embodiment, Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 7As shown, a plurality of cables are provided on one side of the main control cabinet 19, and the main control cabinet 19 is connected to the first liquid pump 205 and the first liquid pump 205 is connected to the water level control sensor 206, and the main control cabinet 19 is connected to the second liquid pump 13, and the main control cabinet 19 is connected to the first fan 301, the second fan 302, and the third fan 18, and the main control cabinet 19 is connected to the VOC gas detector 12 and the VOC gas detector 12 is connected to the detection head 16, and the main control cabinet 19 is connected to the intake pneumatic regulating valve 15, the reflux pneumatic regulating valve 8, and the purification pneumatic regulating valve 10; the main control cabinet 19 is connected to multiple components through cables to realize centralized control and monitoring of the entire exhaust gas purification system. The main control cabinet 19 is connected to the first liquid pump 205, the water level control sensor The sensor 206, the second liquid pump 13, the first fan 301, the second fan 302, the third fan 18, the VOC gas detector 12, the air intake pneumatic regulating valve 15, the reflux pneumatic regulating valve 8, the purification pneumatic regulating valve 10, the pressure sensor 510 and other components are connected. The main control cabinet 19 controls the first liquid pump 205 to replenish the purified drug liquid according to the information of the water level control sensor 206, and provides power for the flow of exhaust gas by controlling the operation of each fan. According to the detection result of the VOC gas detector 12, the opening and closing of the air intake pneumatic regulating valve 15, the reflux pneumatic regulating valve 8 and the purification pneumatic regulating valve 10 are controlled to realize the flow direction control of the exhaust gas. At the same time, the main control cabinet 19 receives the signals of the pressure sensor 510 and the proximity switch 506, controls the movement of the hydraulic rod 503, and realizes the replacement operation of the PP filler multi-faceted ball 504.

[0052] In this embodiment, Figure 1 , Figure 2 and Figure 7As shown, a plurality of cables are arranged on one side of the main control cabinet 19, and the main control cabinet 19 is connected to the pressure sensor 510, and the pressure sensor 510 is connected to the hydraulic rod 503, and the proximity switch 506 is connected to the pressure sensor 510. The inner wall of the second tank body 5 is provided with two induction sheets for use with the proximity switch 506. The second tank body 5 and the third tank body 6 have the same parts structure inside, so as to further purify the exhaust gas and facilitate the replacement of the internal PP filler multifaceted ball 504. The second tank body 5 and the third tank body 6 are both provided with a first integrated The exhaust gas is further purified by the PP filler multifaceted ball 504 inside the tank body through the molded grid plate 505, the second integrally molded grid plate 507, the proximity switch 506, the second spring 511, the slide plate 501 and the slide bar 502 and other parts. When the PP filler multifaceted ball 504 needs to be replaced, the first integrally molded grid plate 505 is tilted through the cooperation of the structures such as the hydraulic rod 503, the slide plate 501 and the slide bar 502, so that the PP filler multifaceted ball 504 can be poured out conveniently for replacement. The connection between the proximity switch 506, the pressure sensor 510 and the main control cabinet 19 realizes the control of the replacement process.

[0053] In this embodiment, Figure 1 , Figure 2 , Figure 7 and Figure 8 As shown, the first tank section 4, the second tank section 5 and the third tank section 6 are stacked vertically, and the first tank section 4 and the third tank section 6 are both installed with a second connecting pipe 403 and a third connecting pipe 601, and the interiors of the second tank section 5 and the third tank section 6 are both provided with internal parts consistent with the first integrally formed grille plate 505, the second integrally formed grille plate 507, the proximity switch 506, the second spring 511, the slide plate 501 and the slide rod 502.

[0054] The use method of the present invention: When the waste gas purification device for printing production is used, the working process is as follows:

[0055] like Figures 1 to 8As shown, first, the exhaust gas enters from the exhaust gas inlet 312 of the filter box 3, and the second fan 302 on one side of the filter box 3 and the first fan 301 connected to the pipeline on the other side provide power for the exhaust gas to enter. The exhaust gas is first preliminarily filtered by the activated carbon 306, and the gas filtered by the activated carbon 306 is discharged into the third tank body 6 by the first fan 301. The first liquid pump 205 extracts the disinfection and purification liquid and introduces it into the second connecting pipe 403 and the third connecting pipe 601, and the two second nozzles 405 and the third nozzle 602 connected respectively are sprayed on the PP filler multi-faceted ball 504 to disinfect the incoming gas. The first filtered gas inside enters the air intake check valve 14 and the air intake pneumatic regulating valve 15 to avoid gas backflow. At the same time, the main control cabinet 19 can control whether to open it. An independent space is provided to facilitate the detection head 16 to detect whether the gas meets the standard. The VOC gas detector 12 connected to the detection head 16 is connected to the main control cabinet 19. The gas that meets the standard is discharged into the pipeline connected to the purification pneumatic regulating valve 10 and the purification check valve 9, so that the gas is sucked in through the third fan 18 and discharged to the purified gas outlet 17 above the exhaust column 11. The gas that does not meet the standard is discharged into the reflux pneumatic regulating valve 8 and the reflux check valve 7 for a second purification, and the second purification is completed by the detection gas discharge port 313. The second liquid pump 13 sucks the purification drug from the liquid storage box 2 and discharges it into the first connecting pipe 310. The first nozzle 311 sprays it on the foam ceramic 314 for a second purification, and then transmits it into the second tank body 5 to avoid the gas that has just entered from mixing with the gas that refluxed for the second time, and then transmits it back for detection again;

[0056] If the activated carbon 306 inside the filter box 3 needs to be replaced, the limit groove 307 needs to be buckled down. Since the limit groove 307 is connected to the elastic structure formed by the first spring 315 through the limit plate 305, it is convenient to disassemble the entire limit groove 307. The activated carbon 306 inside the limit groove 307 is snap-connected, which is convenient for replacement. To replace the foam ceramic 314, pull the pull plate 309 vertically upward so that the pull plate 309 brings out the foam ceramic 314. After pulling it out, take out the foam ceramic 314 for replacement;

[0057] The PP filler multifaceted balls 504 in the second tank body 5 and the third tank body 6 are replaced, and the first integrally formed grid plate 505 is lifted up by the output end shaft of the hydraulic rod 503, so that the slide plate 502 under the first integrally formed grid plate 505 moves along the slideway on the slide rod 501, and the second spring 511 under the first integrally formed grid plate 505 provides auxiliary support. The proximity switch 506 of the first integrally formed grid plate 505 can detect two points, so that when the tilt and level are reached, the signal is transmitted to the pressure sensor 510, and the pressure sensor 510 transmits it back to the main control cabinet 19, so that the main control cabinet 19 can connect the pressure sensor 510 to control the hydraulic rod 503 to stop moving or implement the next step of movement. When the first integrally formed grid plate 505 is tilted, the PP filler multifaceted balls 504 are poured out for easy replacement. When tilted, the fitting surface is facing the discharge port to guide the internal replacement;

[0058] The liquid inlet pipe 204 of the liquid storage box 2 is transmitted to the main control cabinet 19 for replenishing and purifying the drug liquid after being detected by the water level control sensor 206. The liquid storage outlet pipe 202 is used for draining, the drug drain port 604 of the third tank body 6 is used for draining, and the filter outlet pipe 304 of the filter box 3 is used for draining.

[0059] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An exhaust gas purification device for printing production, comprising a base plate (1), characterized in that: A liquid storage box (2) is installed on the top of the bottom plate (1) by screws, a third tank body (6) is installed on one side of the liquid storage box (2) by screws, a second tank body (5) is installed on the top of the third tank body (6) by bolts, a first tank body (4) is installed on the top of the second tank body (5) by bolts, a second liquid pump (13) is provided on one side of the liquid storage box (2), a filter box (3) is connected to the rear of the second liquid pump (13) by a pipeline, a main control cabinet (19) is installed on the top of the bottom plate (1) by screws, an air intake check valve (14) is provided on the top of the first tank body (4), an air intake pneumatic regulating valve (15) is provided on the top of the air intake check valve (14), and a purification pneumatic regulating valve (10) is provided on one side of the air intake pneumatic regulating valve (15). A return pneumatic regulating valve (8) is provided at one end of the pipeline connecting the air intake pneumatic regulating valve (15) and the purification pneumatic regulating valve (10), a return check valve (7) is provided at the other end of the return pneumatic regulating valve (8), a purification check valve (9) is provided at the other end of the purification pneumatic regulating valve (10), a detection head (16) is installed above the pipeline connecting the air intake pneumatic regulating valve (15) and the purification pneumatic regulating valve (10) by screws, a VOC gas detector (12) is connected to the detection head (16) by a cable, an exhaust column (11) is installed above the bottom plate (1) by screws, a purified gas outlet (17) is provided on one side of the top end of the exhaust column (11), and a lower side of the exhaust column (11) is installed to the air intake of the third fan (18) by screws; A second fan (302) is installed on one side of the filter box (3) by means of screws, a first fan (301) is connected to one side of the filter box (3) by means of a pipeline, a third control valve (303) is threadedly installed on the front hole groove of the filter box (3), a filtered liquid outlet pipe (304) is threadedly installed on the front of the third control valve (303), a partition (308) is welded inside the filter box (3), a first connecting pipe (310) is installed on one side of the partition (308) by means of screws, a first nozzle (311) is threadedly installed below the first connecting pipe (310), and the partition (308) is provided with a filter element (311). A limiting groove (307) is installed on the other side by screws, the inside of the limiting groove (307) is clamped with activated carbon (306), one side of the limiting groove (307) is attached to a limiting plate (305), one side of the limiting plate (305) is glued to a first spring (315), the inside of the filter box (3) is attached to a pull plate (309), one side of the pull plate (309) is attached to foam ceramic (314), the other side of the filter box (3) is welded with an exhaust gas inlet (312) and a detection gas discharge port (313), and one side of the exhaust gas inlet (312) is provided with a detection gas discharge port (313); A second connecting pipe (403) is inserted into the interior of the first tank body (4), a second nozzle (405) is threadedly connected to the lower portion of the second connecting pipe (403), a top cover (402) is screwedly mounted on the upper portion of the first tank body (4), a maintenance opening (401) is provided on one side of the top cover (402), and an observation window (404) is provided on one side of the first tank body (4); The outer wall of the second tank body (5) is hingedly mounted with a detection door plate (508); the internal hole groove of the detection door plate (508) is threadedly connected with a fixing screw (509); the interior of the second tank body (5) is screwed with a second integrally formed grille plate (507); a second spring (511) is screwed above the second integrally formed grille plate (507); a first integrally formed grille plate (505) is screwed above the second spring (511); the first integrally formed grille plate (507) is screwed to the outside of the second tank body (5); 5) is installed with a slide plate (501) at the bottom by screws, the inner hole groove of the slide plate (501) is slidably connected with a slide rod (502), a hydraulic rod (503) is installed at the middle part of the bottom of the first integrally formed grid plate (505) by a pin shaft, a PP filler multi-faceted ball (504) is attached to the top of the first integrally formed grid plate (505), a proximity switch (506) is plugged into one side of the first integrally formed grid plate (505), and a pressure sensor (510) is installed on the outer wall of the second tank body (5) by screws; A fourth control valve (603) is threadedly mounted in a hole groove on the outer wall of the third tank body (6); a drug discharge port (604) is threadedly mounted on one side of the fourth control valve (603); a third connecting pipe (601) is provided above the third tank body (6); and a third nozzle (602) is threadedly mounted below the third connecting pipe (601).

2. The exhaust gas purification device for printed matter production according to claim 1 is characterized in that: A first liquid pump (205) is screwed onto the top of the liquid storage box (2), a water level control sensor (206) is plugged into the interior of the liquid storage box (2), a first control valve (203) and a second control valve (201) are threadedly mounted on the front hole groove of the liquid storage box (2), a second control valve (201) is provided on one side of the first control valve (203), a liquid inlet pipe (204) is threadedly mounted on one side of the first control valve (203), a liquid storage outlet pipe (202) is threadedly mounted on one side of the second control valve (201), and the first liquid pump (205) is provided with two pipe connections, the first liquid pump (205) is connected to the liquid storage box (2), the first liquid pump (205) is connected to the third connecting pipe (601), and the third connecting pipe (601) is connected to the second connecting pipe (403).

3. The exhaust gas purification device for printed matter production according to claim 1 is characterized in that: The second liquid pump (13) is provided with two pipe connections, and the second liquid pump (13) is connected to the liquid storage box (2) and the second liquid pump (13) is connected to the first connecting pipe (310) that runs through the filter box (3).

4. The exhaust gas purification device for printed matter production according to claim 1 is characterized in that: The limiting groove (307) is a "U"-shaped groove, and the internal structure of the limiting groove (307) is tightly fitted with the outer wall of the bottom end of the activated carbon (306). The limiting groove (307) is composed of two groups of vertically distributed with the same size. There are a plurality of "U"-shaped grooves horizontally inside the limiting groove (307), and one side of the limiting groove (307) is tightly fitted with the limiting plate (305). The limiting plate (305) forms an elastic structure through the first spring (315). Two first springs (315) are vertically distributed on one side of the limiting plate (305). The other end of the spring (315) is glued to the inner wall of the filter box (3), and the filter box (3) is divided into two spaces by a partition (308). The partition (308) and the inner wall of the filter box (3) are connected by a straight plate, and two horizontally distributed at both ends of the foam ceramic (314). The pull plate (309) is attached to the top of the straight plate, and the foam ceramic (314) is provided in the middle of the pull plate (309). The pull plate (309) is a "U"-shaped groove, and a plurality of first nozzles (311) are horizontally arranged below the first connecting pipe (310).

5. The exhaust gas purification device for printed matter production according to claim 1 is characterized in that: The top of the top cover (402) is provided with a pipeline connecting through it, and the top cover (402) is connected to the air intake check valve (14) and the air intake check valve (14) is connected to the air intake pneumatic regulating valve (15), and the air intake pneumatic regulating valve (15) is connected to the purification pneumatic regulating valve (10) and the purification pneumatic regulating valve (10) is connected to the purification check valve (9), and the pipeline between the air intake pneumatic regulating valve (15) and the return pneumatic regulating valve (8) is connected to the return pneumatic regulating valve (8) and the return pneumatic regulating valve (8) is connected to the return check valve (7), and the return check valve (7) is connected to the detection gas discharge port (313).

6. The exhaust gas purification device for printed matter production according to claim 1 is characterized in that: The slide plate (501) is provided with two arc grooves inside, and the external structural dimensions of the slide bar (502) are slidably fitted in the arc grooves of the slide plate (501), and slide bars (502) and slide plates (501) are provided on both sides of the slide plate (501), and the slide bar (502) is plugged into the inner wall of the second tank body (5).

7. The exhaust gas purification device for printed matter production according to claim 1 is characterized in that: The external structural dimensions of the first integrally formed grid plate (505) are smaller than those of the second integrally formed grid plate (507), a second spring (511) is provided between the first integrally formed grid plate (505) and the second integrally formed grid plate (507), and a hydraulic rod (503) is obliquely installed between the first integrally formed grid plate (505) and the second integrally formed grid plate (507).

8. The exhaust gas purification device for printed matter production according to claim 1 is characterized in that: A plurality of cables are provided on one side of the main control cabinet (19), and the main control cabinet (19) is connected to the first liquid pump (205) and the first liquid pump (205) is connected to the water level control sensor (206), and the main control cabinet (19) is connected to the second liquid pump (13), and the main control cabinet (19) is connected to the first fan (301), the second fan (302), and the third fan (18), and the main control cabinet (19) is connected to the VOC gas detector (12) and the VOC gas detector (12) is connected to the detection head (16), and the main control cabinet (19) is connected to the air intake pneumatic regulating valve (15), the return pneumatic regulating valve (8), and the purification pneumatic regulating valve (10).

9. The exhaust gas purification device for printed matter production according to claim 1, characterized in that: A plurality of cables are provided on one side of the main control cabinet (19), and the main control cabinet (19) is connected to the pressure sensor (510), and the pressure sensor (510) is connected to the hydraulic rod (503), and the proximity switch (506) is connected to the pressure sensor (510). The inner wall of the second tank body (5) is provided with two induction sheets for use with the proximity switch (506).

10. The exhaust gas purification device for printed matter production according to claim 1, characterized in that: The first tank body (4), the second tank body (5) and the third tank body (6) are stacked and arranged vertically, and the first tank body (4) and the third tank body (6) are both installed with a second connecting pipe (403) and a third connecting pipe (601), and the interiors of the second tank body (5) and the third tank body (6) are both provided with internal parts consistent with a first integrally formed grid plate (505), a second integrally formed grid plate (507), a proximity switch (506), a second spring (511), a slide plate (501) and a slide rod (502).

Images