Internal drainage and internal and external air pressure balance structure of rotary drum

Abstract

The utility model discloses an internal drainage and internal and external air pressure balance structure of a rotary drum, which comprises a rotary drum body, a transmission mechanism, a water guide pipeline and a water collection mechanism, the transmission mechanism is arranged at one end of the rotary drum body, and a central drilling shaft head is arranged at the other end of the rotary drum body; the water guide pipeline is arranged in the rotary drum body, and one end of the water guide pipeline is used for being connected with the center drilling shaft head in a communicating mode. The water collecting mechanism is arranged in the rotary drum body, and the water draining end of the water collecting mechanism is connected with the end, away from the center drilling shaft head, of the water guiding pipeline in a communicating mode. Through the structural cooperation of the water guide pipeline and the water collecting mechanism, when the rotary drum body rotates and the water collecting mechanism is located at the lowest end of the rotary drum body, residual water in the rotary drum body is collected firstly, and then when the water collecting mechanism is higher than the rotating center of the rotary drum body, water is guided to the center drilling shaft head through the water guide pipeline to be discharged; due to the structural arrangement, no residual water exists in the drum body.

Description

TECHNICAL FIELD

[0001] The utility model relates to a drum type solid-liquid separation filter field, especially a drum internal drainage, internal and external air pressure balance structure. BACKGROUND

[0002] Drum type filter is widely used in chemical industry, environmental protection, papermaking and other industries, and is used for solid-liquid separation. The drum is a key component of the filter. During operation, the drum is immersed in the filter medium and rotates slowly. Solid-liquid separation is achieved through vacuum negative pressure suction filtration. To increase the filtration effect, the medium temperature is generally high, sometimes reaching about 70℃. When the machine stops and the material stops, it returns to normal temperature or room temperature. The drum body is a completely closed structure, and a sealed manhole cover is configured to facilitate personnel access for maintenance.

[0003] Due to the change of medium temperature, the enclosed gas in the drum will expand and contract with heat, causing changes in air pressure. Therefore, the drum body temperature is 70℃ during operation, and the drum body temperature is 25℃ when the machine stops and the material stops. Under repeated temperature changes, the internal air pressure of the drum body changes repeatedly, which is not conducive to the strength structure of the drum body. The weld of the drum body will slowly deteriorate, resulting in weld cracks. Not only will this reduce the service life of the drum body, but the weld defects and manhole cover seals will also allow water to seep into the drum body. This will cause residual water to exist inside the drum body, further affecting the use of the drum body. UTILITY MODEL CONTENTS

[0004] The utility model aims to provide a drum internal drainage, internal and external air pressure balance structure to solve the problems raised in the background art.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a drum internal drainage, internal and external air pressure balance structure, comprising a drum body, further comprising:

[0006] A transmission mechanism is provided at one end of the drum body. The other end of the drum body is provided with a center drill hole shaft head.

[0007] A water guide pipeline is provided in the drum body. One end of the water guide pipeline is used to connect the center drill hole shaft head for internal drainage and exhaust of the drum body.

[0008] A water collecting mechanism is provided in the drum body. The drainage end of the water collecting mechanism is connected to the end of the water guide pipeline away from the center drill hole shaft head.

[0009] Preferably, the transmission mechanism includes a speed reducer. One end of the speed reducer is used to connect a driving motor. The other end of the speed reducer is provided with a transmission shaft. The outer wall of the transmission shaft is connected to the end of the drum body away from the center drill hole shaft head.

[0010] Preferably, the water guide pipeline comprises:

[0011] An external thread inner joint, one end of which is connected with the middle part of the center drilling shaft head in a penetrating manner;

[0012] A water guide steel pipe, one end of which is used for connecting the water collecting mechanism, and the other end of which is provided with an adapter structure with the external thread inner joint.

[0013] Preferably, the adapter structure comprises a right angle joint, one end of which is connected with the end of the external thread inner joint away from the center drilling shaft head in a penetrating manner, and the other end of which is connected with one end of the water guide steel pipe in a penetrating manner.

[0014] Preferably, the water collecting mechanism comprises a collecting groove, which is arranged on the inner wall of the rotary drum body in a fitting manner, and the top of the collecting groove is used for connecting the water guide steel pipe.

[0015] Preferably, the top of the collecting groove is provided with a water guide hole, the inner wall of which is connected with the end of the water guide steel pipe away from the right angle joint.

[0016] Preferably, one side of the collecting groove is provided with an open port, and the opening direction of the open port is towards the rotation direction of the rotary drum body.

[0017] The technical effects and advantages of the present application are as follows:

[0018] The present application has the advantages that: through the structural cooperation design of the water guide pipeline and the water collecting mechanism, when the rotary drum body rotates, the water collecting mechanism is at the lowest end of the rotary drum body, the residual water in the rotary drum body is collected first, then when the water collecting mechanism is higher than the rotation center of the rotary drum body, the water is guided to the center drilling shaft head through the water guide pipeline and discharged, so that there is no residual water in the rotary drum body, and the air inside and outside the rotary drum body is communicated due to the design of the water guide pipeline, part of the air is discharged through the center drilling shaft head at high temperature, and part of the air is sucked at low temperature, so that the air pressure inside and outside is balanced, and the rotary drum body is prevented from being damaged due to the change of the air pressure inside the rotary drum body. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structure side view of the whole of the present application.

[0020] Figure 2 It is a structure front view of the whole of the present application.

[0021] Figure 3 It is a connection side view of the center drilling shaft head, the water guide pipeline and the water collecting mechanism of the present application.

[0022] Figure 4The utility model discloses a central drilling shaft head, water guide pipe and the connection front view of water collecting mechanism.

[0023] Figure 5 The utility model discloses the structure of collecting groove's plan view.

[0024] In the drawing: 1, drum body; 2, speed reducer; 201, transmission shaft; 3, central drilling shaft head; 4, outer thread inner joint; 5, right angle joint; 6, water guide steel pipe; 7, collecting groove; 701, water guide hole. DETAILED DESCRIPTION

[0025] The utility model discloses an embodiment of the utility model will be clearly and completely described below with the drawings in the embodiment of the utility model to the technical scheme in the embodiment of the utility model, obviously, the described embodiment only is a part of embodiment of the utility model, instead of all the embodiment. Based on the embodiment in the utility model, all other embodiments that the ordinary skill in the art obtains without making creative labor belong to the range of protection of the utility model.

[0026] The utility model provides a kind of drum internal drainage, inside and outside air pressure balance structure as shown in Figures 1-5 It further includes:

[0027] Transmission mechanism, transmission mechanism is set to one end of drum body 1, and the other end of drum body 1 is provided with central drilling shaft head 3;

[0028] Specifically, transmission mechanism includes speed reducer 2, and one end of speed reducer 2 is used to connect the motor of driving, and the other end of speed reducer 2 is provided with transmission shaft 201, and the outer wall of transmission shaft 201 is connected with the end of drum body 1 away from central drilling shaft head 3.

[0029] It should be noted that the end of transmission shaft 201 connected with drum body 1 is used as the driving shaft of driving drum body 1 to rotate, and central drilling shaft head 3 rotates following drum body 1, and central drilling shaft head 3 is drilled in the middle part of shaft head, so that the drilling hole is used as the channel between the inside of drum body 1 and the outside, to adjust the air pressure change after the temperature of drum body 1 rises and falls, taking the filter with 35 square meters of drum surface filtering area as an example, the calculation is as follows:

[0030] Drum body diameter is 3 meters, and drum body length is 3.8 meters, so the volume of drum body is:

[0031] 3.14 × (3 / 2) 2 × 3.8 = 26.8 cubic meters (1);

[0032] Excluding the volume occupied by other structures of drum body, the internal volume of drum body is calculated as 24 cubic meters, room temperature T1 is 25 DEG C, working temperature is 70 DEG C, normal pressure P1, according to the ideal gas state equation:

[0033] PV / T = C (constant) (2);

[0034] T1 = (25 + 273) K (3);

[0035] T2 = (70 + 273) K (4);

[0036] P2 = P1T2 / T1 = P1 x (70 + 273) / (25 + 273) = 1.15P1 (5);

[0037] That is, the temperature rises from room temperature to 70°C, and the air pressure inside the drum increases by 11.5%. In the present scheme, the central drilling passage of the central drilling shaft head 3 is designed to facilitate the discharge of some air through the central drilling shaft head 3 at high temperature and the intake of some air at low temperature, thereby achieving the balance of internal and external air pressure and avoiding damage to the drum body 1 due to changes in air pressure inside the drum.

[0038] The water guide pipeline is arranged in the drum body 1, and one end of the water guide pipeline is used to guide the connection of the central drilling shaft head 3 to discharge the air inside the drum body 1.

[0039] The water collecting mechanism is arranged in the drum body 1, and the water outlet end of the water collecting mechanism is in communication with the end of the water guide pipeline away from the central drilling shaft head 3.

[0040] Specifically, the water collecting mechanism includes a collecting groove 7, which is arranged in close contact with the inner wall of the drum body 1. One side of the collecting groove 7 is provided with an open port, and the opening direction of the open port is toward the rotation direction of the drum body 1.

[0041] It should be noted that the collecting groove 7 is in close contact with the arc surface of the inner wall of the drum body 1, and the open port of the collecting groove 7 faces the rotation direction of the drum. In this way, when the collecting groove 7 is at the bottom end, the accumulated water in the drum body 1 will be guided and collected in the collecting groove 7.

[0042] Specifically, the water guide pipeline includes:

[0043] The outer thread inner joint 4 is in through connection with the middle part of the central drilling shaft head 3.

[0044] The water guide steel pipe 6 is used to connect the water collecting mechanism, and the other end of the water guide steel pipe 6 is in through connection with the outer thread inner joint 4.

[0045] Further, the adapter structure includes a right angle joint 5, one end of which is in through connection with the end of the outer thread inner joint 4 away from the central drilling shaft head 3, and the other end of the right angle joint 5 is in through connection with one end of the water guide steel pipe 6.

[0046] Further, the top of the collecting groove 7 is used for connecting the water guide steel pipe 6, and the top of the collecting groove 7 is provided with a water guide hole 701, the inner wall of the water guide hole 701 is connected with the one end of the water guide steel pipe 6 away from the right angle joint 5.

[0047] It should be noted that the side central hole of the center drilling shaft head 3 is provided with a thread, so that the center drilling shaft head 3 is connected with the outer thread inner joint 4 through the thread, and then connected with the water guide steel pipe 6 through the right angle joint 5, and finally connected with the collecting groove 7 through the water guide steel pipe 6.

[0048] The operation principle of the scheme is that when the collecting groove 7 rotates to the lowest position, the residual water in the drum body 1 is collected, and when the collecting groove 7 rotates to the center line of the drum body 1, the residual water is guided by the collecting groove 7 and flows into the water guide steel pipe 6 due to the action of gravity, and then flows out of the drum body 1 through the right angle joint 5, the outer thread inner joint 4 and the center of the center drilling shaft head 3 in turn, thereby realizing the function of discharging the residual water in the drum body 1, and the drum body 1 rotates once to discharge once, and the residual water in the drum body 1 is continuously discharged through continuous rotation, and the air inside and outside the drum body 1 is communicated due to the existence of the water guide pipeline, part of the air is discharged through the center drilling shaft head 3 at high temperature, and part of the air is sucked at low temperature, so that the internal and external air pressure is balanced, the drum body 1 is prevented from being damaged due to the change of the air pressure in the drum body, and the residual water in the drum body can be discharged at any time.

[0049] Finally, it should be noted that the above only describes the preferred embodiments of the present application, and is not used to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A structure for draining inside of a rotary drum, balancing air pressure between inside and outside, comprising a rotary drum body (1), characterized in that, Also include: Transmission mechanism, the transmission mechanism is arranged in one end of the drum body (1), the other end of the drum body (1) is provided with center drilling shaft head (3); Water guide pipeline, the water guide pipeline is arranged in the drum body (1), and one end of the water guide pipeline is used for guiding the connection center drilling shaft head (3) to carry out the exhaust drainage inside the drum body (1); Water collecting mechanism, the water collecting mechanism is arranged in the drum body (1), and the drainage end of the water collecting mechanism is connected with the one end of the water guide pipeline away from the center drilling shaft head (3).

2. The inside water drainage and inside and outside air pressure balance structure of a rotary drum according to claim 1, wherein The transmission mechanism includes a speed reducer (2), one end of the speed reducer (2) is used for connecting the driving motor, the other end of the speed reducer (2) is provided with a transmission shaft (201), the outer wall of the transmission shaft (201) is connected with the one end of the drum body (1) away from the center drilling shaft head (3).

3. The inside water drainage and inside and outside air pressure balance structure of a rotary drum according to claim 1, wherein The water guide pipeline includes: External thread inner joint (4), one end of the external thread inner joint (4) is connected with the middle part of the center drilling shaft head (3); Water guide steel pipe (6), one end of the water guide steel pipe (6) is used for connecting the water collecting mechanism, the other end of the water guide steel pipe (6) is provided with an adapter structure between the external thread inner joint (4).

4. The inside water drainage and inside and outside air pressure balance structure of a rotary drum according to claim 3, wherein The adapter structure includes a right angle joint (5), one end of the right angle joint (5) is connected with the one end of the external thread inner joint (4) away from the center drilling shaft head (3), the other end of the right angle joint (5) is connected with one end of the water guide steel pipe (6).

5. The inside water drainage and inside and outside air pressure balance structure of a rotary drum according to claim 3, wherein The water collecting mechanism includes a collecting groove (7), the collecting groove (7) is arranged on the inner wall of the drum body (1), and the top of the collecting groove (7) is used for connecting the water guide steel pipe (6).

6. The inside water drainage and inside and outside air pressure balance structure of a rotary drum according to claim 5, wherein The top of the collecting groove (7) is provided with a water guide hole (701), the inner wall of the water guide hole (701) is connected with the one end of the water guide steel pipe (6) away from the right angle joint (5).

7. The inside water drainage and inside and outside air pressure balance structure of a rotary drum according to claim 5, wherein One side of the collecting groove (7) is provided with an open port, and the opening direction of the open port is towards the rotation direction of the drum body (1).

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