A filter pressure dryer

Abstract

The present invention relates to the technical field of filtering equipment, and specifically to a filter pressure dryer, comprising a shell, a drying chamber, a placement rack, an exhaust hole, an external air cavity, an exhaust duct and a movable upper cover plate, wherein an air injection pipe coaxially arranged with the placement rack is arranged at the bottom of the movable upper cover plate, the air injection cavity arranged on the upper side of the movable upper cover plate is connected to a hot air delivery pipe, and the external air cavity is located above the exhaust hole and is provided with an external air delivery pipe, which is connected to an air inlet box arranged at the top of the drying chamber. The technical scheme directly injects hot compressed air into a filter element through the air injection pipe, quickly vaporizes and discharges the moisture in the filter element, and through structures such as the external air cavity, the external air delivery pipe and the air inlet box, after drying is completed, hot air can be used to accelerate the air flow in the external air cavity, and the humid air in the drying chamber can be discharged in time, thereby avoiding the moisture problem caused by condensed water on the inner wall of the drying chamber after the hot air is stopped.

Description

Technical Field

[0001] The invention relates to the technical field of filtering equipment, in particular to a filter pressure dryer. Background Art

[0002] In industrial production and various filtration systems, the drying of the filter element is a key link to ensure its stable performance and service life. In the prior art, the pressure drying method is used to dry the filter element, and its core principle is to use hot compressed air. The ambient air is compressed by an air compressor to increase its pressure, and then the compressed air is heated by a heating device. Hot compressed air has a strong penetrating ability. When it is introduced into the drying chamber equipped with the filter element, it will quickly pass through the channel and the small holes on the side wall of the filter element. Since the temperature of the hot air is higher than the saturated vapor pressure of the water in the filter element, the water will quickly vaporize into water vapor and be carried out of the filter element with the flow of hot compressed air, thereby achieving rapid drying of the filter element.

[0003] However, the hot air carrying moisture repeatedly passes through the filter element in the drying chamber, which will cause some moisture to remain in the filter element, reducing the drying efficiency. After the hot air is stopped, the hot air carrying moisture in the drying chamber is prone to condensation when it contacts the inner wall of the drying chamber, thereby causing humidity in the drying chamber, which is not conducive to subsequent drying work. Summary of the invention

[0004] In view of the above problems, it is necessary to provide a filter pressure dryer to solve the existing technical problems.

[0005] In order to solve the problems of the prior art, the technical solution adopted by the present invention is: a filter pressure dryer, comprising a shell, and a cylindrical drying chamber arranged in the shell, a placement rack for placing a filter element is arranged at the bottom of the drying chamber, an exhaust hole is arranged on the side wall of the drying chamber, the shell is located outside the drying chamber and is provided with an external air cavity, the exhaust hole connects the drying chamber and the external air cavity, an exhaust duct is arranged at the bottom of the external air cavity, a movable upper cover plate is slidably installed in the drying chamber, a linear drive for driving the movable upper cover plate to move along the axis of the drying chamber is arranged on the top of the shell, an air injection pipe coaxially arranged with the placement rack is arranged at the bottom of the movable upper cover plate, a first conical section with a taper gradually increasing upward is arranged on the upper part of the air injection pipe, the first conical section fits the input end of the filter element placed on the placement rack and enables the air injection pipe to be inserted into the filter element; an injection cavity connected to the air injection pipe is provided on the upper side of the movable upper cover plate, the air injection cavity is connected to the hot air delivery pipe, and the hot air delivery pipe is connected to the output end of the air source. When the movable upper cover plate is attached to the filter element, the hot air delivered by the hot air delivery pipe enters the filter element through the injection cavity and the air injection pipe and is then discharged into the drying chamber; the outer air cavity is provided with an external air delivery pipe above the exhaust hole, and the external air delivery pipe is connected to the air inlet box provided on the top of the drying chamber, and the air inlet box is provided with a cartridge tube extending vertically downward, and a secondary air cavity is provided on one side of the air injection cavity, and the secondary air cavity is provided with an air outlet nozzle which is on the same axis as the cartridge tube and extends vertically upward. When the movable upper cover plate is moved up to the air outlet nozzle and inserted into the cartridge tube, the hot air delivered by the hot air delivery pipe is accelerated and delivered to the outer air cavity through the secondary air cavity, the air inlet box and the external air delivery pipe.

[0006] Preferably, the outer wall of the first conical section of the air injection pipe is provided with fitting rubber.

[0007] Preferably, a lifting air pipe is coaxially arranged in the air injection cavity, the outer diameter of the lifting air pipe is the same as the inner diameter of the air injection pipe, the lifting air pipe is inserted in the air injection pipe, a flange head is arranged on the top of the lifting air pipe, and the hot air delivery pipe is connected to the flange head; an air outlet is arranged on the bottom side of the lifting air pipe, and a limiting head is coaxially arranged at the bottom end of the lifting air pipe, the outer diameter of the limiting head is larger than the outer diameter of the lifting air pipe, and when the limiting head is attached to the bottom end of the air injection pipe, the lifting air pipe blocks the air injection pipe, and the air outlet is located in the air injection cavity.

[0008] Preferably, a lifting frame is installed on the top of the lifting air pipe, and the working end of the linear drive is fixedly connected to the lifting frame. Guide rods extending vertically downward are arranged at both ends of the lifting frame, and the guide rods are inserted into the positioning sleeves arranged on the upper surface of the movable upper cover plate; when the lifting frame moves down to fit the top of the positioning sleeve, the air outlet of the air injection cavity is located below the air injection pipe.

[0009] Preferably, the lifting frame and the movable upper cover are elastically connected via a first spring, and the elastic force of the first spring causes the movable upper cover to move downward relative to the lifting frame.

[0010] Preferably, a second conical section whose taper gradually increases downward is provided at the lower part of the air outlet nozzle, and a conical expansion nozzle with the same taper as the second conical section is provided at the bottom opening of the insert tube. When the upper cover plate is moved upward to the outer wall of the second conical section of the air outlet nozzle and fits into the inner wall of the conical expansion nozzle, the air outlet nozzle is inserted into the insert tube; a conical valve core with the same taper as the second conical section is coaxially provided in the air outlet nozzle, and the conical valve core moves along the axial direction to change the connection state between the air outlet nozzle and the insert tube.

[0011] Preferably, a piston rod extending vertically downward is provided at the bottom of the conical valve core, and the piston rod is inserted in a guide sleeve arranged in the auxiliary air cavity. A second spring is provided on the outside of the guide sleeve, and the second spring elastically connects the conical valve core and the bottom surface of the auxiliary air cavity. The elastic force of the second spring causes the conical valve core to move up to fit the inner wall of the second conical section to seal the air outlet nozzle; a push rod extending vertically downward is provided on the top surface of the interior of the cartridge tube, and the axis of the push rod is in the same straight line as the axis of the cartridge tube. The diameter of the push rod is smaller than the inner diameter of the air outlet nozzle. When the air outlet nozzle is inserted into the cartridge tube, the push rod pushes the conical valve core to move downward and compresses the second spring.

[0012] Preferably, the external air delivery pipe is connected to the air inlet box via a connecting air pipe, a one-way air valve is provided in the connecting air pipe, and the one-way air valve allows hot air to flow from the air inlet box to the external air delivery pipe in one direction.

[0013] Preferably, the bottom surface of the drying chamber is provided with a first concave surface, and the two sides of the first concave surface are mirror-imaged with the connecting line between the exhaust hole and the center of the bottom surface of the drying chamber as the symmetry line; the bottom surface of the drying chamber is provided with a second inclined surface extending obliquely along the connecting line between the exhaust hole and the center of the bottom surface of the drying chamber, and the exhaust hole is located at the lowest end of the second inclined surface.

[0014] Preferably, the drying chamber of the shell is located inside a cylinder composed of a fixed cylinder with a semicircular cross section and a movable cover plate, and the movable cover plate is hingedly installed on one side of the fixed cylinder.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] Firstly, the present invention directly injects hot compressed air into the filter element through the air injection pipe, so that the hot air acts on the filter element more concentratedly. Compared with the traditional method of dispersing hot air into the filter element in the drying chamber, the moisture in the filter element can be vaporized and discharged more quickly, reducing the possibility of moisture remaining in the filter element and effectively improving the drying efficiency.

[0017] Secondly, the present invention arranges an external air delivery pipe and related air inlet box, plug-in tube, auxiliary air cavity and air outlet nozzle structure in the external air cavity. After drying is completed, hot air can be used to accelerate the air flow in the external air cavity and discharge humid air in time, thus avoiding the moisture problem caused by condensation water on the inner wall of the drying chamber after stopping the hot air, providing a dry environment for subsequent drying work, which is beneficial to improving the overall drying effect and equipment service life.

[0018] Thirdly, the present invention can accurately control whether the hot air enters the air injection pipe to dry the filter element, or changes the flow direction to enter other channels such as the auxiliary air cavity, by moving the upper cover plate and the lifting and lowering air pipe, thereby realizing flexible and accurate switching of the hot air delivery direction to meet the work requirements at different stages. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a three-dimensional diagram of a filter pressure dryer in a first working state;

[0020] Figure 2 is a three-dimensional diagram of a filter pressure dryer in a second working state;

[0021] Figure 3 It is a front view of a filter pressure dryer in the second working state;

[0022] Figure 4 yes Figure 3 A cross-sectional view at AA of FIG.

[0023] Figure 5 yes Figure 4 A partial enlarged view of point B;

[0024] Figure 6 is a side view of a filter pressure dryer in a second working state;

[0025] Figure 7 yes Figure 6 A cross-sectional view of the section at CC;

[0026] Figure 8 It is a front view of a filter pressure dryer in a third working state;

[0027] Fig. 9 yes Figure 8 Cross-sectional view at DD of FIG.

[0028] Fig.10 yes Fig. 9 A local enlarged view of point E;

[0029] Fig.11 yes Fig. 9 A partial enlarged view of point F.

[0030] The numbers in the figure are: 1, shell; 11, drying chamber; 111, placement rack; 112, exhaust hole; 113, first concave surface; 114, second inclined surface; 115, fixed cylinder; 116, movable cover plate; 12, external air cavity; 121, exhaust pipe; 13, linear drive; 14, external air delivery pipe; 141, connecting air pipe; 142, one-way air valve; 15, air inlet box; 151, plug-in pipe; 152, conical expansion nozzle; 153, ejector rod; 2, movable upper cover plate; 21 , air injection pipe; 211, first conical section; 212, bonding rubber; 22, air injection cavity; 221, lifting air pipe; 222, flange head; 223, air outlet; 224, limit head; 23, auxiliary air cavity; 231, air outlet nozzle; 232, second conical section; 233, conical valve core; 234, piston rod; 235, guide sleeve; 236, second spring; 24, lifting frame; 241, guide rod; 242, first spring; 25, positioning sleeve; 3, hot air delivery pipe. DETAILED DESCRIPTION

[0031] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0032] Reference Figures 1 to 11 :

[0033] A filter pressure dryer comprises a housing 1 and a cylindrical drying chamber 11 arranged in the housing 1. A placement rack 111 for placing a filter element is arranged at the bottom of the drying chamber 11. An exhaust hole 112 (combined with a Figure 4 and Figure 7 ), the shell 1 is located outside the drying chamber 11 and is provided with an outer air cavity 12, the exhaust hole 112 connects the drying chamber 11 and the outer air cavity 12, an exhaust pipe 121 is provided at the bottom of the outer air cavity 12, a movable upper cover plate 2 is slidably installed in the drying chamber 11, a linear drive 13 for driving the movable upper cover plate 2 to move along the axis of the drying chamber 11 is provided at the top of the shell 1, and an air injection pipe 21 (combined with the air injection pipe 21) coaxially arranged with the placement frame 111 is provided at the bottom of the movable upper cover plate 2 Figure 4 and Figure 5), the upper part of the air injection pipe 21 is provided with a first conical section 211 with a gradually increasing taper upward, the first conical section 211 fits the input end of the filter element placed on the placement rack 111 and allows the air injection pipe 21 to be inserted into the filter element; the upper side of the movable upper cover plate 2 is provided with an air injection cavity 22 connected to the air injection pipe 21, the air injection cavity 22 is connected to the hot air delivery pipe 3, and the hot air delivery pipe 3 is connected to the output end of the air source. When the movable upper cover plate 2 fits the filter element, the hot air delivered by the hot air delivery pipe 3 passes through the air injection cavity The air inlet 15 is connected to the air inlet box 15 provided on the top of the drying chamber 11. The air inlet box 15 is provided with a plug-in tube 151 extending vertically downward. A secondary air cavity 23 is provided on one side of the air injection cavity 22. The secondary air cavity 23 is provided with an air outlet nozzle 231 (combined with the air outlet nozzle 231) extending vertically upward and being coaxial with the plug-in tube 151. Figure 5 and Fig.11 ), when the upper cover plate 2 is moved upward until the air outlet nozzle 231 is inserted into the insertion tube 151, the hot air transported by the hot air transport pipe 3 is accelerated and transported to the outer air cavity 12 through the auxiliary air cavity 23, the air inlet box 15 and the external air delivery pipe 14.

[0034] When the present application is in use, the working end of the linear drive 13 is in the initial position, so that the movable upper cover plate 2 is moved up to a suitable height. The linear drive 13 can be a linear cylinder or an electric push rod, etc. The staff places the filter element to be dried on the placement rack 111 at the bottom of the drying chamber 11, and keeps the input end of the filter element below the air injection pipe 21. The linear drive 13 is started, and the movable upper cover plate 2 is driven to move downward along the axis of the drying chamber 11, so that the first conical section 211 at the bottom of the air injection pipe 21 fits the input end of the filter element placed on the placement rack 111 and is inserted into the filter element. The air source conveys the hot compressed air to the air injection chamber 22 through the hot air delivery pipe 3, and then enters the interior of the filter element through the air injection pipe 21. With its strong penetration ability, the hot compressed air quickly penetrates the channel and the small holes on the side wall of the filter element. Since the temperature of the hot air is higher than the saturated vapor pressure of the water in the filter element, the water vaporizes into water vapor and is discharged into the drying chamber 11 together with the hot compressed air. In the drying chamber 11, hot air with water vapor enters the outer air cavity 12 through the exhaust hole 112 on the side wall, and is discharged from the exhaust pipe 121 at the bottom of the outer air cavity 12. When the filter element is dried to a certain extent, the linear drive 13 drives the movable upper cover plate 2 to move upward until the air outlet nozzle 231 is inserted into the insertion tube 151. At this time, the hot air transported by the hot air delivery pipe 3 changes its flow direction and is accelerated to the outer air cavity 12 through the auxiliary air cavity 23, the air inlet box 15 and the external air delivery pipe 14. This accelerated hot air will form a fast-flowing airflow in the outer air cavity 12, and quickly discharge the humid air that previously remained in the outer air cavity 12 and may be returned from the drying chamber 11 through the exhaust hole 112 in small quantities from the exhaust pipe 121, thereby renewing the air in the drying chamber 11 and the outer air cavity 12 to prepare for the next drying. In this embodiment, hot compressed air is directly injected into the filter element through the air injection pipe 21, so that the hot air acts on the filter element more concentratedly. Compared with the traditional method of dispersing hot air into the filter element in the drying chamber 11, the moisture in the filter element can be vaporized and discharged more quickly, reducing the possibility of moisture remaining in the filter element, and effectively improving the drying efficiency. In this embodiment, by setting the external air delivery pipe 14 and the related air inlet box 15, the plug-in tube 151, the auxiliary air cavity 23 and the air outlet nozzle 231 structure in the external air cavity 12, the hot air can be used to accelerate the air flow in the external air cavity 12 after the drying is completed, and the humid air is discharged in time, avoiding the moisture problem caused by condensed water on the inner wall of the drying chamber 11 after the hot air is stopped, providing a dry environment for subsequent drying work, which is conducive to improving the overall drying effect and the service life of the equipment. This embodiment has a compact structure, and the various components work together. The linear drive 13 controls the movement of the movable upper cover plate 2, and cleverly realizes the switching of the hot air injection mode and the ventilation function of the drying chamber 11 and the outer air cavity 12. It occupies a small space and is easy to install and maintain. It is suitable for the needs of industrial production and various filtering systems for filter element drying.

[0035] To ensure the airtightness when the outer wall of the first tapered section 211 of the air injection pipe 21 fits against the filter element, the following features are specifically provided:

[0036] The outer wall of the first tapered section 211 of the air injection pipe 21 is provided with a fitting rubber 212.

[0037] In this embodiment, the fitting rubber 212 on the outer wall of the first tapered section 211 first contacts the input end of the filter element. As the air injection pipe 21 continues to be inserted, the fitting rubber 212 deforms under its own elastic force and tightly fills the gap between the first tapered section 211 and the filter element. During the drying process, when the hot compressed air enters the filter element from the air injection cavity 22 through the air injection pipe 21, the sealing structure formed by the fitting rubber 212 can effectively prevent the hot air from leaking from the contact part between the air injection pipe 21 and the filter element, ensuring that all the hot air passes through the inside of the filter element, thereby completing the drying process of the filter element.

[0038] To realize the switching of the hot air delivery direction, the following features are specifically provided:

[0039] A lifting air pipe 221 is coaxially arranged in the air injection cavity 22. The outer diameter of the lifting air pipe 221 is the same as the inner diameter of the air injection pipe 21. The lifting air pipe 221 is inserted into the air injection pipe 21. A flange head 222 is arranged at the top of the lifting air pipe 221, and the hot air delivery pipe 3 is connected to the flange head 222; an air outlet hole 223 is arranged on the side surface of the bottom of the lifting air pipe 221. A limiting head 224 is coaxially arranged at the bottom end of the lifting air pipe 221. The outer diameter of the limiting head 224 is larger than the outer diameter of the lifting air pipe 221. When the limiting head 224 fits against the bottom end of the air injection pipe 21, the lifting air pipe 221 blocks the air injection pipe 21, and the air outlet hole 223 is located in the air injection cavity 22.

[0040] A lifting frame 24 is installed at the top end of the lifting air pipe 221. The working end of the linear driver 13 is fixedly connected to the lifting frame 24. Guide rods 241 extending vertically downward are arranged at both ends of the lifting frame 24. The guide rods 241 are inserted into positioning sleeves 25 arranged on the upper surface of the moving upper cover plate 2; when the lifting frame 24 moves down to fit against the top end of the positioning sleeve 25, the air outlet hole 223 of the lifting air pipe 221 is located below the air injection pipe 21.

[0041] In this embodiment, when the linear actuator 13 is started, it drives the lifting frame 24 to move downward, and the guide rod 241 slides in the positioning sleeve 25. At this time, the lifting air pipe 221 descends together with the lifting frame 24. After the upper cover plate 2 is moved to fit the filter element, the lifting frame 24 continues to move downward relative to the upper cover plate 2 to fit the top of the positioning sleeve 25. At this time, the air outlet 223 of the lifting air pipe 221 moves down to the bottom of the air injection pipe 21. The hot air delivered by the hot air delivery pipe 3 passes through the lifting air pipe 221 connected to the flange head 222, and is injected into the filter element from the air outlet 223 of the lifting air pipe 221 to achieve drying of the filter element. When it is necessary to switch the hot air delivery direction, the linear actuator 13 works in the reverse direction and drives the lifting frame 24 to move upward. The lifting air pipe 221 moves upward accordingly, and the limit head 224 gradually approaches and finally fits the bottom end of the air injection pipe 21 to block the air injection pipe 21. At this time, the air outlet 223 is located in the air injection cavity 22. Then, the upper cover plate 2 and the lifting frame 24 are moved upward synchronously. When the upper cover plate 2 is moved upward to the air outlet nozzle 231 provided on the auxiliary air cavity 23 and inserted into the plug-in tube 151 on the air inlet box 15, the hot air delivered by the hot air delivery pipe 3 is accelerated and delivered to the outer air cavity 12 through the auxiliary air cavity 23, the air inlet box 15 and the external air delivery pipe 14. In this embodiment, by moving the upper cover plate 2 and the lifting and lowering movement of the lifting air pipe 221, it is possible to accurately control whether the hot air enters the air injection pipe 21 to dry the filter element, or changes the flow direction to enter other channels such as the auxiliary air cavity 23, thereby realizing flexible and accurate switching of the hot air delivery direction to meet the work requirements at different stages.

[0042] In order to ensure the sealing pressure of the movable upper cover plate 2 on the filter element, the following features are specifically set:

[0043] The lifting frame 24 is elastically connected to the movable upper cover plate 2 via a first spring 242 , and the elastic force of the first spring 242 causes the movable upper cover plate 2 to move downward relative to the lifting frame 24 .

[0044] In this embodiment, the first spring 242 between the lifting frame 24 and the movable upper cover plate 2 can ensure that when the lifting frame 24 continues to move downward relative to the movable upper cover plate 2, the movable upper cover plate 2 can ensure the pressure on the top of the filter element under the action of the elastic force of the first spring 242, and ensure that the fitting rubber 212 produces sufficient deformation to ensure the airtightness of the contact position with the filter element.

[0045] In order to prevent the hot air from being discharged from the air outlet 231 of the auxiliary air cavity 23 during the upward movement of the movable upper cover plate 2, the following features are specifically provided:

[0046] The lower part of the air outlet nozzle 231 is provided with a second tapered section 232 (such as Figure 5 and Fig.11As shown in the figure, the bottom opening of the insert tube 151 is provided with a conical expansion nozzle 152 with the same taper as the second conical section 232. When the upper cover plate 2 is moved upward until the outer wall of the second conical section 232 of the air outlet nozzle 231 fits the inner wall of the conical expansion nozzle 152, the air outlet nozzle 231 is inserted into the insert tube 151; a conical valve core 233 with the same taper as the second conical section 232 is coaxially provided in the air outlet nozzle 231, and the conical valve core 233 moves along the axial direction to change the connection state between the air outlet nozzle 231 and the insert tube 151.

[0047] In this embodiment, when the outer wall of the second conical section 232 of the air outlet nozzle 231 fits against the inner wall of the conical expansion nozzle 152 at the bottom opening of the insertion tube 151, the air outlet nozzle 231 is completely inserted into the insertion tube 151. In this process, the second conical section 232 and the conical expansion nozzle 152 play an auxiliary sealing role to prevent hot air from leaking from the fitting point between the air outlet nozzle 231 and the conical expansion nozzle 152. Similarly, the conical valve core 233 coaxially arranged in the air outlet nozzle 231 and having the same taper as the second conical section 232 can fit against the inner wall of the second conical section 232 of the air outlet nozzle 231, thereby blocking the air outlet nozzle 231 and preventing certain waste caused by hot air leakage.

[0048] In order to automatically move the conical valve core 233 to allow hot air to flow to the air inlet box 15 when the air outlet nozzle 231 is fully inserted into the insertion tube 151, the following features are specifically provided:

[0049] A piston rod 234 extending vertically downward is provided at the bottom of the conical valve core 233, and the piston rod 234 is inserted into a guide sleeve 235 set in the auxiliary air chamber 23. A second spring 236 is sleeved on the outside of the guide sleeve 235. The second spring 236 elastically connects the conical valve core 233 and the bottom surface of the auxiliary air chamber 23. The elastic force of the second spring 236 causes the conical valve core 233 to move up to fit the inner wall of the second conical section 232 to block the air outlet nozzle 231; a push rod 153 extending vertically downward is provided on the top surface of the inner part of the insertion tube 151, and the axis of the push rod 153 is on the same straight line as the axis of the insertion tube 151. The diameter of the push rod 153 is smaller than the inner diameter of the air outlet nozzle 231. When the air outlet nozzle 231 is inserted into the insertion tube 151, the push rod 153 pushes the conical valve core 233 to move downward and compresses the second spring 236.

[0050] In this embodiment, during the process of inserting the air outlet nozzle 231 into the cartridge tube 151, the push rod 153 on the top surface of the cartridge tube 151 contacts the conical valve core 233. As the air outlet nozzle 231 is further inserted, the push rod 153 continues to push the conical valve core 233 downward to overcome the elastic force of the second spring 236, thereby opening the air outlet nozzle 231 and connecting the auxiliary air cavity 23 with the cartridge tube 151. At this time, the hot air delivery direction is switched, and the hot air is accelerated from the auxiliary air cavity 23 through the air outlet nozzle 231, the cartridge tube 151, the air inlet box 15 and the external air delivery pipe 14 to the external air cavity 12.

[0051] In order to prevent the hot air entering the drying chamber 11 from flowing backward through the external air delivery pipe 14, the following features are specifically provided:

[0052] The external air delivery pipe 14 is connected to the air inlet box 15 via a connecting air pipe 141 , in which a one-way air valve 142 is provided. The one-way air valve 142 allows hot air to flow from the air inlet box 15 to the external air delivery pipe 14 in one direction.

[0053] In this embodiment, a one-way air valve 142 is provided in the connecting air pipe 141 between the external air supply pipe 14 and the air intake box 15. The one-way air valve 142 prevents the hot air from flowing back from the external air cavity 12 to the air intake box 15, thereby ensuring the one-way flow of the hot air carrying moisture.

[0054] In order to ensure that the hot air and the condensed water that may appear in the drying chamber 11 can quickly move to the exhaust hole 112 when the hot air is transported by the external air delivery pipe 14, the following features are specifically set:

[0055] The bottom surface of the drying chamber 11 is provided with a first concave surface 113. Figure 7 The two sides of the drying chamber 11 are mirror-imaged with the connecting line of the exhaust hole 112 and the center of the bottom of the drying chamber 11 as the symmetry line; the bottom of the drying chamber 11 is provided with a second inclined surface 114 extending obliquely along the connecting line of the exhaust hole 112 and the center of the bottom of the drying chamber 11, and the exhaust hole 112 is located at the lowest end of the second inclined surface 114 (as shown in FIG. Fig. 9 as shown).

[0056] In this embodiment, hot air enters the external air delivery pipe 14 through the air inlet box 15, and then drives the air flow in the drying chamber 11. Since the first concave surface 113 and the second inclined surface 114 are provided on the bottom surface of the drying chamber 11, the hot air will be guided by the shape of the bottom surface during the flow. The special shapes on both sides of the first concave surface 113 make the hot air form a specific airflow distribution in the chamber and converge in the direction of the exhaust hole 112. The second inclined surface 114 further guides the hot air to flow toward the exhaust hole 112 along the inclined direction, accelerating the movement speed of the hot air toward the exhaust hole 112. If condensed water appears in the drying chamber 11, under the action of gravity, the condensed water will flow to the lower position of the bottom surface. The first concave surface 113 guides the condensed water to flow in the direction of the connecting line between the exhaust hole 112 and the center of the bottom surface of the drying chamber 11, while the second inclined surface 114 allows the condensed water to flow quickly along the inclined surface to the exhaust hole 112 at the lowest end. This embodiment optimizes the airflow path in the drying chamber 11 through the design of the first concave surface 113 and the second inclined surface 114, so that the hot air can move toward the exhaust hole 112 more quickly and orderly, thereby improving the exhaust efficiency of the hot air, avoiding local accumulation of hot air in the chamber, and facilitating the maintenance of a dry environment in the drying chamber 11.

[0057] In order to facilitate the placement and removal of the filter element in the drying chamber 11, the following features are specifically provided:

[0058] The drying chamber 11 of the housing 1 is located inside a cylinder body consisting of a fixed cylinder body 115 and a movable cover plate 116 with a semicircular cross section. The movable cover plate 116 is hingedly installed on one side of the fixed cylinder body 115 .

[0059] In this embodiment, when the filter element needs to be placed, the operator opens the movable cover 116. Since the movable cover 116 is hinged on one side of the fixed cylinder 115, the movable cover 116 only needs to be rotated outward around the hinge point to fully expose one side of the drying chamber 11. At this time, the operator can easily place the filter element on the placement rack 111 at the bottom of the drying chamber 11. After the placement is completed, the movable cover 116 is rotated back around the hinge point and closed, so that the drying chamber 11 is restored to a sealed state and ready for drying operation.

[0060] Working principle: When in use, the working end of the linear actuator 13 is in the initial position, so that the movable upper cover plate 2 moves up to a suitable height. The staff places the filter element to be dried on the placement rack 111 at the bottom of the drying chamber 11, and keeps the input end of the filter element below the air injection pipe 21. The linear actuator 13 is started, and drives the movable upper cover plate 2 to move downward along the axis of the drying chamber 11, so that the first conical section 211 at the bottom of the air injection pipe 21 fits the input end of the filter element placed on the placement rack 111 and is inserted into the filter element. The air source conveys the hot compressed air to the air injection cavity 22 through the hot air conveying pipe 3, and then enters the interior of the filter element through the air injection pipe 21. In the drying chamber 11, the hot air with water vapor enters the outer air cavity 12 through the exhaust hole 112 on the side wall, and is discharged from the exhaust pipe 121 at the bottom of the outer air cavity 12. When the filter element is dried to a certain extent, the linear actuator 13 drives the movable upper cover plate 2 to move upward until the air outlet nozzle 231 is inserted into the plug-in tube 151. At this time, the hot air delivered by the hot air delivery pipe 3 changes its flow direction and is accelerated to be delivered to the outer air cavity 12 through the auxiliary air cavity 23, the air inlet box 15 and the outer air delivery pipe 14. This accelerated hot air will form a fast-flowing airflow in the outer air cavity 12, and the humid air previously remaining in the outer air cavity 12 and possibly returning in small amounts from the drying chamber 11 through the exhaust hole 112 will be quickly discharged from the exhaust pipe 121, thereby renewing the air in the drying chamber 11 and the outer air cavity 12 to prepare for the next drying.

[0061] The above embodiments only express one or several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. A filter pressure dryer, comprising a housing (1), and a cylindrical drying chamber (11) arranged in the housing (1), a placement rack (111) for placing a filter element being arranged at the bottom of the drying chamber (11), an exhaust hole (112) being arranged on a side wall of the drying chamber (11), an outer air cavity (12) being arranged outside the drying chamber (11) of the housing (1), the exhaust hole (112) communicating with the drying chamber (11) and the outer air cavity (12), and an exhaust duct (121) being arranged at the bottom of the outer air cavity (12), characterized in that: A movable upper cover plate (2) is slidably mounted in the drying chamber (11); a linear drive (13) for driving the movable upper cover plate (2) to move along the axis of the drying chamber (11) is arranged at the top of the housing (1); an air injection pipe (21) coaxially arranged with the placement rack (111) is arranged at the bottom of the movable upper cover plate (2); a first conical section (211) whose taper gradually increases upward is arranged at the upper part of the air injection pipe (21); the first conical section (211) fits the input end of the filter element placed on the placement rack (111) and allows the air injection pipe (21) to be inserted into the filter element; An air injection cavity (22) connected to the air injection pipe (21) is provided on the upper side of the movable upper cover plate (2); the air injection cavity (22) is connected to the hot air delivery pipe (3); the hot air delivery pipe (3) is connected to the output end of the air source; when the movable upper cover plate (2) is attached to the filter element, the hot air delivered by the hot air delivery pipe (3) enters the filter element through the air injection cavity (22) and the air injection pipe (21) and is then discharged into the drying chamber (11); The outer air cavity (12) is provided with an outer air delivery pipe (14) located above the exhaust hole (112), and the outer air delivery pipe (14) is connected to an air inlet box (15) provided at the top of the drying chamber (11), and the air inlet box (15) is provided with a plug-in pipe (151) extending vertically downward, and a secondary air cavity (23) is provided on one side of the air injection cavity (22), and the secondary air cavity (23) is provided with an air outlet nozzle (231) which is coaxial with the plug-in pipe (151) and extends vertically upward, and when the upper cover plate (2) is moved upward until the air outlet nozzle (231) is inserted into the plug-in pipe (151), the hot air delivered by the hot air delivery pipe (3) is accelerated and delivered into the outer air cavity (12) through the secondary air cavity (23), the air inlet box (15) and the outer air delivery pipe (14); A lifting air pipe (221) is coaxially arranged in the air injection cavity (22); the outer diameter of the lifting air pipe (221) is the same as the inner diameter of the air injection pipe (21); the lifting air pipe (221) is inserted into the air injection pipe (21); a flange head (222) is arranged on the top of the lifting air pipe (221); and the hot air delivery pipe (3) is connected to the flange head (222); An air outlet hole (223) is arranged on the side of the bottom of the lifting air pipe (221); a limiting head (224) is coaxially arranged at the bottom end of the lifting air pipe (221); the outer diameter of the limiting head (224) is larger than the outer diameter of the lifting air pipe (221); when the limiting head (224) fits the bottom end of the air injection pipe (21), the lifting air pipe (221) blocks the air injection pipe (21), and the air outlet hole (223) is located in the air injection cavity (22).

2. A filter pressure dryer according to claim 1, characterized in that: The outer wall of the first tapered section (211) of the gas injection pipe (21) is provided with a fitting rubber (212).

3. A filter pressure dryer according to claim 1, characterized in that: A lifting frame (24) is installed at the top of the lifting air pipe (221); the working end of the linear drive (13) is fixedly connected to the lifting frame (24); guide rods (241) extending vertically downward are arranged at both ends of the lifting frame (24); the guide rods (241) are inserted into positioning sleeves (25) arranged on the upper surface of the movable upper cover plate (2); When the lifting frame (24) moves down to fit the top end of the positioning sleeve (25), the air outlet hole (223) of the air injection cavity (22) is located below the air injection pipe (21).

4. A filter pressure dryer according to claim 3, characterized in that: The lifting frame (24) and the movable upper cover plate (2) are elastically connected via a first spring (242), and the elastic force of the first spring (242) causes the movable upper cover plate (2) to move downward relative to the lifting frame (24).

5. A filter pressure dryer according to claim 1, characterized in that: The lower part of the air outlet nozzle (231) is provided with a second conical section (232) whose taper gradually increases downwards, and the bottom opening of the insertion tube (151) is provided with a conical expansion nozzle (152) having the same taper as the second conical section (232), and when the upper cover plate (2) is moved upward until the outer wall of the second conical section (232) of the air outlet nozzle (231) fits the inner wall of the conical expansion nozzle (152), the air outlet nozzle (231) is inserted into the insertion tube (151); A conical valve core (233) having the same taper as the second conical section (232) is coaxially arranged inside the air outlet nozzle (231), and the conical valve core (233) moves along the axial direction to change the connection state between the air outlet nozzle (231) and the insertion tube (151).

6. A filter pressure dryer according to claim 5, characterized in that: A piston rod (234) extending vertically downward is provided at the bottom of the conical valve core (233), the piston rod (234) is inserted into a guide sleeve (235) provided in the auxiliary air chamber (23), a second spring (236) is provided on the outside of the guide sleeve (235), the second spring (236) elastically connects the conical valve core (233) and the bottom surface of the auxiliary air chamber (23), and the elastic force of the second spring (236) causes the conical valve core (233) to move upward to fit the inner wall of the second conical section (232) to block the air outlet nozzle (231); The top surface of the insert tube (151) is provided with a push rod (153) extending vertically downward, the axis of the push rod (153) and the axis of the insert tube (151) are on the same straight line, the diameter of the push rod (153) is smaller than the inner diameter of the air outlet nozzle (231), and when the air outlet nozzle (231) is inserted into the insert tube (151), the push rod (153) pushes the conical valve core (233) downward and compresses the second spring (236).

7. A filter pressure dryer according to claim 1, characterized in that: The external air delivery pipe (14) is connected to the air inlet box (15) via a connecting air pipe (141). A one-way air valve (142) is provided in the connecting air pipe (141). The one-way air valve (142) allows hot air to flow from the air inlet box (15) to the external air delivery pipe (14) in one direction.

8. The filter pressure dryer according to claim 1, characterized in that: The bottom surface of the drying chamber (11) is provided with a first concave surface (113), and two sides of the first concave surface (113) are mirror-imaged with a connecting line between the exhaust hole (112) and the center of the bottom surface of the drying chamber (11) as a symmetry line; The bottom surface of the drying chamber (11) is provided with a second inclined surface (114) extending obliquely along a connecting line between the exhaust hole (112) and the center of the bottom surface of the drying chamber (11), and the exhaust hole (112) is located at the lowest end of the second inclined surface (114).

9. A filter pressure dryer according to claim 1, characterized in that: The drying chamber (11) of the housing (1) is located inside a cylinder consisting of a fixed cylinder (115) having a semicircular cross section and a movable cover plate (116), and the movable cover plate (116) is hingedly mounted on one side of the fixed cylinder (115).

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