Elastic suction nozzle and filter

Abstract

The elastic suction nozzle comprises a pipe body, an elastic piece, a suction nozzle head and a limiting check ring, a suction cavity is formed in the pipe body, one end of the elastic piece is connected with the inner wall of the suction cavity, the other end of the elastic piece is connected with the suction nozzle head, and the suction nozzle head is in clearance fit with the suction cavity. The suction nozzle head and the suction cavity are in dynamic sealing fit through a sealing piece, and the limiting check ring is fixed to the inner wall of the suction cavity at the top of the pipe body. The suction nozzle is connected into the suction cavity of the pipe body through the elastic piece, and the suction nozzle can be well attached to the inner wall of the filter element through the elastic force of the elastic piece, so that a gap generated between the suction nozzle head and the inner wall of the filter element due to the fact that the inner wall of the filter element and the suction nozzle head are not concentric or the inner wall of the filter element is abraded can be well compensated; therefore, good contact between the filter element and the suction nozzle head is guaranteed, a filter cake on the filter element can be well removed, clean regeneration of the filter element is achieved, and normal use of the filter element is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of filters, in particular to an elastic suction nozzle and a filter. Background Art

[0002] At present, the existing backwash filters used for liquid filtration and separation have several types according to the way of removing the filter cake, such as scraper type, brush type, and sucking type. This type of filter and filter element are mostly cylindrical structures. The filtrate passes through the filter element in the filter radially, and the impurities in the filtrate are trapped on the cylindrical surface of the filter element. Once the filter element is blocked, the filter starts the scraper, brush or suction nozzle to rotate along the circumferential inner wall of the filter element, and the filter cake on the filter element (the impurities filtered by the filter element) can be removed to achieve the reuse of the filter element. Among them, the sucking filter uses the pressure of the filtrate itself to form a pressure difference on both sides of the suction nozzle, and the filter cake accumulated on the filter element is discharged to the outside of the filter through the suction nozzle, which is similar to the function of sucking to achieve the regeneration of the filter element. Based on the above working principle, the smaller the gap between the suction nozzle and the inner wall of the filter element during the rotation process, the better the effect of removing the filter cake will be. However, due to the reasons of installation and processing technology, it is often difficult to ensure the gap between the suction nozzle and the filter element, resulting in the filter cake adhering to the filter element cannot be completely removed during the backwashing process, affecting the regeneration effect of the filter element. Utility Model Content

[0003] In view of the deficiencies in the background technology, the utility model provides an elastic suction nozzle.

[0004] The technical solution adopted by the utility model is: an elastic suction nozzle, comprising a tube body, an elastic member, a suction nozzle head and a limit retaining ring, a suction cavity is arranged in the tube body, one end of the elastic member is connected to the inner wall of the suction cavity, and the other end is connected to the suction nozzle head, a clearance fit is provided between the suction nozzle head and the suction cavity, and a dynamic seal is provided between the suction nozzle head and the suction cavity through a sealing member, and the limit retaining ring is fixed on the inner wall of the suction cavity at the top of the tube body.

[0005] Furthermore, an annular groove is provided on the inner wall of the suction cavity at the top of the tube body, and the limit retaining ring is fixed in the annular groove.

[0006] Furthermore, there are two sealing members.

[0007] Furthermore, the elastic member is a coil spring.

[0008] The present application also provides a filter, comprising the elastic suction nozzle mentioned above.

[0009] Furthermore, the filter also includes a shell, a filter element, a hollow shaft, a rotating device and a sewage pipe, the rotating device is connected to the hollow shaft, the hollow shaft is connected to the sewage pipe, the elastic suction nozzle is connected to the hollow shaft, and the sewage pipe is connected to a sewage valve.

[0010] Furthermore, the filter housing is provided with a raw material outlet and a raw material inlet.

[0011] The beneficial effects of the utility model are as follows: the suction nozzle of the utility model is connected to the suction cavity of the tube body by an elastic member, and the elastic force of the elastic member can be used to fit the suction nozzle well to the inner wall of the filter element, thereby compensating well for the gap between the suction nozzle head and the inner wall of the filter element due to the non-concentricity between the inner wall of the filter element and the suction nozzle head or due to the wear of the inner wall of the filter element, thereby ensuring good contact between the filter element and the suction nozzle head, being able to well remove the filter cake on the filter element, achieving the cleaning and regeneration of the filter element, and ensuring the normal use of the filter element.

[0012] In addition to the objects, features and advantages described above, the present invention has other objects, features and advantages.

[0013] The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model.

[0015] Figure 2 Schematic diagram of the elastic nozzle and filter.

[0016] Figure 1-2 In: 1. Tube body; 2. Elastic part; 3. Suction nozzle; 4. Limit retaining ring; 5. Suction chamber; 6. Seal; 7. Ring groove; 8. Shell; 9. Filter element; 10. Hollow shaft; 11. Rotating device; 12. Drain pipe; 13. Drain valve; 14. Raw material outlet; 15. Raw material inlet. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0019] The utility model provides an elastic suction nozzle.

[0020] In this embodiment, refer to Figure 1-2 The elastic suction nozzle comprises a tube body 1, an elastic member 2, a suction nozzle head 3 and a limit retaining ring 4. A suction cavity 5 is arranged in the tube body. One end of the elastic member is connected to the inner wall of the suction cavity, and the other end is connected to the suction nozzle head. A clearance is fitted between the suction nozzle head and the suction cavity, and a dynamic seal is performed between the suction nozzle head and the suction cavity through a sealing member 6. The limit retaining ring is fixed on the inner wall of the suction cavity at the top of the tube body.

[0021] In the above technical solution, the suction nozzle is connected to the suction cavity of the tube body by an elastic member, and the elastic force of the elastic member can be used to fit the suction nozzle well to the inner wall of the filter element, thereby compensating for the gap between the suction nozzle head and the inner wall of the filter element due to the non-concentricity between the inner wall of the filter element and the suction nozzle head or the wear of the inner wall of the filter element, thereby ensuring good contact between the filter element and the suction nozzle head, and being able to remove the filter cake on the filter element, thereby achieving clean regeneration of the filter element and ensuring the normal use of the filter element.

[0022] Specifically, an annular groove 7 is provided on the inner wall of the suction cavity at the top of the tube body, and the limit retaining ring is fixed in the annular groove; there are two sealing members; and the elastic member is a coil spring.

[0023] The sealing member can be a sealing ring, which is directly installed on the sealing groove of the nozzle head. There are two sealing members, which ensure the dynamic sealing cooperation between the nozzle head and the suction cavity.

[0024] The present application also provides a filter, including the above-mentioned elastic suction nozzle; the filter also includes an outer shell 8, a filter element 9, a hollow rotating shaft 10, a rotating device 11 and a sewage pipe 12, the rotating device is connected to the hollow rotating shaft to provide power for the rotation of the hollow rotating shaft, the hollow rotating shaft is connected to the sewage pipe, and the impurities sucked by the suction nozzle can be discharged in time through the sewage pipe, the elastic suction nozzle is connected to the hollow rotating shaft, and the sewage pipe is connected to a sewage valve 13, and the sewage valve is used to control the opening and closing of the sewage pipe; the filter shell is provided with a raw material outlet 14 and a raw material inlet 15.

[0025] When the elastic suction nozzle of the present application is used, it is directly connected to the hollow rotating shaft for use, which can improve the backwashing effect of the filter.

[0026] Technical personnel should note: Although the utility model has been described according to the above specific implementation methods, the utility model concept of the utility model is not limited to this utility model. Any modification using the utility model concept will be included in the scope of protection of this patent right.

Claims

1. An elastic suction nozzle, characterized in that: It includes a tube body, an elastic part, a suction nozzle head and a limit retaining ring. A suction cavity is arranged in the tube body. One end of the elastic part is connected to the inner wall of the suction cavity, and the other end is connected to the suction nozzle head. There is a gap fit between the suction nozzle head and the suction cavity, and the suction nozzle head and the suction cavity are dynamically sealed by a sealing part. The limit retaining ring is fixed on the inner wall of the suction cavity at the top of the tube body.

2. The elastic suction nozzle according to claim 1, characterized in that: An annular groove is arranged on the inner wall of the suction cavity at the top of the tube body, and the limit retaining ring is fixed in the annular groove.

3. The elastic suction nozzle according to claim 1, characterized in that: There are two sealing members.

4. The elastic suction nozzle according to claim 2, characterized in that: The elastic member is a coil spring.

5. A filter, characterized in that: The invention comprises the elastic suction nozzle as described in any one of claims 1 to 4.

6. The filter according to claim 5, characterized in that: The filter also includes a shell, a filter element, a hollow shaft, a rotating device and a sewage pipe, the rotating device is connected to the hollow shaft, the hollow shaft is connected to the sewage pipe, the elastic suction nozzle is connected to the hollow shaft, and the sewage pipe is connected to a sewage valve.

7. The filter according to claim 6, characterized in that: The filter housing is provided with a raw material outlet and a raw material inlet.

Images