A plate-and-frame filter

Abstract

The utility model relates to solid -liquid separation equipment technical field, concretely to a kind of plate-and-frame filter, including rack, thrust plate, head plate, filter mechanism and compacting mechanism are sequentially arranged on rack, further including transition plate, transition plate is set between the thrust plate and head plate, material injection passage is opened in the transition plate, one end of material injection passage is used to connect injection pipe, and the other end forms discharge port towards the head plate;The end surface of the transition plate towards the head plate, first sealing groove is opened around the discharge port, first sealing ring is arranged in the first sealing groove and part structure of the first sealing ring protrudes from the end surface of the transition plate;The transition plate is fixedly connected with the thrust plate by fastener;The head plate is configured to be able to compact on the end surface of the transition plate with the first sealing ring.The utility model has simple structure, good sealing, maintenance and installation convenient, improve the reliability and production efficiency of equipment operation.

Description

Technical Field

[0001] This utility model relates to the field of solid-liquid separation equipment technology, specifically a plate and frame filter. Background Technology

[0002] Plate and frame filters are commonly used solid-liquid separation equipment. Their working principle mainly relies on the filtration mechanism. When the mixed liquid flows through the filter cloth, solid particles are trapped on the cloth, gradually accumulating to form a sludge cake, while the liquid passes through the filter cloth, becoming a clear filtrate. In existing technologies, the material feeding process generally involves passing through a thrust plate and a head plate before entering the filtration mechanism. For example, as shown in patent CN216023355U, a mud-water extrusion filtration device, the thrust plate has a feed hole in the middle, a head plate is fixedly connected to one side of the thrust plate, and a filtration mechanism is located on one side of the head plate; alternatively, an insertion pipe is connected to the head plate, and the insertion pipe is connected to the injection pipe, thus allowing the material to flow from the injection pipe to the insertion pipe, head plate, and filtration mechanism. These feeding structure designs have the following drawbacks: firstly, the material flow between the insertion pipe and the head plate, and between the injection pipe and the head plate... Firstly, a loose connection between the feed pipe and the insertion pipe can easily lead to leaks. Secondly, maintenance is cumbersome: the head plate is located close to the filter press mechanism. Before each filter press operation, the clamping plate of the clamping device must first press the filter mechanism and the head plate against the thrust plate. When material leaks between the thrust plate and the head plate, the clamping device must be loosened, and the entire clamping plate and filter mechanism must be removed before the head plate can be taken off for maintenance. This process requires releasing enormous clamping force, moving multiple components, is extremely time-consuming, labor-intensive, and cumbersome, resulting in numerous unplanned downtimes. This often leads users to choose to operate the machine with minor leaks until the leak worsens, ultimately causing more serious production and environmental problems.

[0003] Therefore, there is an urgent need in the field for a feed connection structure that can enable rapid maintenance while ensuring a leak-proof sealing performance. Utility Model Content

[0004] This utility model provides a plate and frame filter press, which solves the problems of poor sealing and extremely poor maintainability of the feeding structure of existing plate and frame filter presses.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a plate and frame filter press, comprising a frame, on which a thrust plate, a head plate, a filtering mechanism, and a pressing mechanism are sequentially arranged, and further comprising a transition plate disposed between the thrust plate and the head plate, the transition plate having a material injection channel, one end of the material injection channel being used to connect to a material injection pipe, and the other end forming a discharge port facing the head plate; a first sealing groove being formed around the discharge port on the end face of the transition plate facing the head plate, the first sealing groove containing a first sealing ring, and a portion of the structure of the first sealing ring protruding from the end face of the transition plate; the transition plate and the thrust plate being fixedly connected by fasteners; the head plate being configured to press against the end face of the transition plate where the first sealing ring is located.

[0006] Furthermore, the first sealing ring is an O-ring.

[0007] Furthermore, the O-ring is made of oil-resistant nitrile rubber.

[0008] Furthermore, the fastener is a bolt, the transition plate is provided with a through hole for the bolt to pass through, and the thrust plate is provided with a threaded hole corresponding to the through hole.

[0009] Furthermore, the injection channel is located at the center of the transition plate.

[0010] Furthermore, a sealing structure is also provided at the connection interface between the injection pipe and the transition plate.

[0011] Furthermore, the sealing structure is a second sealing ring disposed at the interface.

[0012] Furthermore, the head plate has an inlet hole at the position corresponding to the outlet of the injection channel, and the inlet hole is aligned and connected to the outlet of the injection channel.

[0013] Compared with existing technologies, the beneficial effects of this solution are: 1. Excellent sealing performance, achieving zero leakage: Through the combination of sealing groove and O-ring sealing structure, the injection pipe and transition plate, and the transition plate and head plate are double sealed, completely eliminating the risk of material leakage and reducing the equipment failure rate.

[0014] 2. Simplified structure and convenient installation: During installation, simply place the sealing ring into the groove and fasten the transition plate to the thrust plate with bolts, which greatly simplifies the assembly process and reduces the installation difficulty and time.

[0015] 3. Easy to inspect and maintain: The transition plate and thrust plate are connected by bolts and can be detached without welding. During installation, only the bolt holes need to be aligned and tightened. During maintenance, there is no need to remove the head plate. The transition plate or O-ring can be replaced simply by loosening the bolts, which greatly reduces the difficulty of maintenance and downtime.

[0016] 4. Improve equipment reliability and production efficiency: By eliminating leakage faults, the equipment operates more stably and reliably, reducing unplanned downtime and thus improving overall production efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a plate and frame filter according to the present invention; Figure 2 This is a schematic diagram of the transition plate of this utility model; Figure 3 This is a schematic diagram of the structure of the first sealing groove of this utility model; Figure 4 This is a schematic diagram of the head plate of this utility model.

[0018] In the figure: 1-frame; 2-thrust plate; 3-head plate; 4-filtration mechanism; 5-pressing mechanism; 6-transition plate; 7-injection channel; 8-first sealing groove; 9-through hole. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Implementation, for example, attached Figure 1-4 As shown: This embodiment is a plate and frame filter press, including a frame 1, on which a thrust plate 2, a head plate 3, a filter mechanism 4 and a pressing mechanism 5 are arranged in sequence, and a transition plate 6 is also included.

[0021] A transition plate 6 is disposed between the thrust plate 2 and the head plate 3. A material injection channel 7 is formed on the transition plate 6, preferably located at the center of the transition plate 6. One end of the material injection channel 7 is used to connect to a material injection pipe, and the other end forms an outlet facing the head plate 3. That is, the two ends of the material injection channel 7 are a first interface and a second interface, respectively. The first interface is used to connect with an external material injection pipe, and the second interface is used to fit into the inlet hole of the head plate 3. Figure 4 As shown, the head plate 3 has a feed hole at the corresponding position. When the transition plate 6 is pressed against the head plate 3, the outlet of the injection channel 7 is precisely aligned with and connected to the feed hole of the head plate 3.

[0022] On the end face of the transition plate 6 facing the head plate 3, a first sealing groove 8 is formed around the discharge port. A first sealing ring is provided in the first sealing groove 8, and part of the structure of the first sealing ring protrudes from the end face of the transition plate 6. The first sealing ring is an O-ring made of oil-resistant nitrile rubber. The head plate 3 is configured to press against the end face of the transition plate 6 where the first sealing ring is provided.

[0023] The transition plate 6 and the thrust plate 2 are fixedly connected by fasteners, namely bolts. The transition plate 6 is provided with through holes 9 for the bolts to pass through, and the thrust plate 2 is provided with threaded holes corresponding to the through holes 9.

[0024] In this design, to achieve a tight seal, the present invention employs two lines of sealing protection: First seal: On the end face of the transition plate 6 facing the head plate 3, a first sealing groove 8 is formed around the outlet (i.e., discharge port) of the injection channel 7 (e.g., ...). Figure 3 As shown, a first sealing ring (O-ring) made of oil-resistant nitrile rubber is embedded in the first sealing groove 8. When the clamping mechanism 5 of the equipment clamps the filter mechanism 4, the head plate 3, and the transition plate 6, the end face of the head plate 3 presses against the end face of the transition plate 6. The end face of the head plate 3 directly compresses the protruding part of the first sealing ring, causing it to undergo elastic deformation, thereby forming a reliable static seal at the joint area between the outlet of the transition plate 6 and the inlet of the head plate 3. This seal ensures that material only enters the inlet of the head plate 3 from the transition plate 6 and does not leak from between the two plates.

[0025] The second seal: To further optimize the sealing effect, a sealing structure is also installed at the connection interface between the injection pipe and the injection channel 7 of the transition plate 6. Specifically, an annular groove is opened on the inner wall of the connection interface, and a second sealing ring is embedded therein. This seal constitutes a pipe interface seal, which, together with the first seal, forms a double guarantee, ensuring that there is no risk of leakage in the initial stage when the material enters the transition plate 6 from the injection pipe.

[0026] Assembly and Workflow: During installation, first, place the first sealing ring into the first sealing groove 8, and then insert the second sealing ring into the connection interface between the injection pipe and the transition plate 6. Next, insert the injection pipe into the first interface of the transition plate 6 until the end face of the injection pipe fits against the inside of the transition plate 6 (compressing the O-ring to form a seal). Then, use bolts to pass through the through holes 9 on the transition plate 6, screw them into the pre-made threaded holes on the thrust plate 2, and tighten them evenly. At this time, the transition plate 6 is firmly fixed on the thrust plate 2. Finally, start the equipment clamping mechanism 5 to move towards the thrust plate 2, so that the feed hole of the head plate 3 fits tightly against the second interface of the transition plate 6, completing the overall assembly. At this time, both seals are in place.

[0027] After the equipment has been running for a period of time, if any of the sealing rings needs to be replaced, simply loosen and remove the bolts in reverse order to separate the transition plate 6 from the thrust plate 2, thus facilitating replacement and maintenance. The entire process does not require disturbing the head plate 3 or the complex piping system.

[0028] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A plate and frame filter press, comprising a frame, wherein a thrust plate, a head plate, a filtering mechanism, and a pressing mechanism are sequentially arranged on the frame, characterized in that: It also includes a transition plate disposed between the thrust plate and the head plate. The transition plate has an injection channel, one end of which is used to connect to an injection pipe, and the other end forms an outlet facing the head plate. On the end face of the transition plate facing the head plate, a first sealing groove is formed around the outlet. A first sealing ring is disposed in the first sealing groove, and a portion of the structure of the first sealing ring protrudes from the end face of the transition plate. The transition plate and the thrust plate are fixedly connected by fasteners. The head plate is configured to press against the end face of the transition plate where the first sealing ring is disposed.

2. A plate and frame filter press according to claim 1, characterized in that: The first sealing ring is an O-ring.

3. A plate and frame filter press according to claim 2, characterized in that: The O-ring is made of oil-resistant nitrile rubber.

4. A plate and frame filter press according to claim 1, characterized in that: The fastener is a bolt, the transition plate has a through hole for the bolt to pass through, and the thrust plate has a threaded hole corresponding to the through hole.

5. A plate and frame filter press according to claim 1, characterized in that: The injection channel is located at the center of the transition plate.

6. A plate and frame filter press according to claim 1, characterized in that: A sealing structure is also provided at the connection interface between the injection pipe and the transition plate.

7. A plate and frame filter press according to claim 6, characterized in that: The sealing structure is a second sealing ring disposed at the interface.

8. A plate and frame filter press according to claim 1, characterized in that: The head plate has a feed hole at the position corresponding to the discharge port of the injection channel, and the feed hole is aligned and connected to the discharge port of the injection channel.

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