Screw pump filtering mechanism

Abstract

The utility model discloses a filtering mechanism of a screw pump. The filtering mechanism of the screw pump is arranged at a feeding hole of the screw pump; the screw pump filtering mechanism comprises a feeding hopper arranged on the feeding port, an annular blocking part is formed on the inner wall of the feeding hopper, a filtering net is arranged above the annular blocking part, pressing strips are arranged on the two sides of the filtering net, an opening is formed in the upper end of the feeding hopper, a cover cap is detachably arranged on the opening, and the pressing strips are arranged on the pressing strips. A spring is arranged on the inner wall of the cover cap, so that the spring can abut against the upper end face of the pressing strip, and the side face of the feeding hopper communicates with a connecting flange. The problems that due to the fact that the feeding port of the screw pump is generally connected with a long conveying pipeline, a filter screen arranged in the feeding port is difficult to disassemble and clean, and the filter screen is prone to being blocked after being used for a long time are solved.

Description

Technical Field

[0001] The utility model relates to the field of screw pumps, in particular to a filter mechanism of a screw pump. Background Art

[0002] A screw pump is a rotor-type positive displacement pump. Its operating principle relies on the meshing of the screw and bushing, creating volume changes between the suction and discharge chambers to transport liquid. To filter the liquid entering the screw pump, a filter screen or other mechanism is typically installed at the feed port. For example, Chinese patent number CN201821968159.2 provides a single screw pump, comprising a screw pump body arranged in an internal cavity structure, a connecting rod arranged inside the screw pump body, an input end provided at one end of the screw pump body, a stator provided at the other end, a rotor provided in the stator, the rotor and the connecting rod connected by a first universal joint, and the connecting rod connected to the input end by a second universal joint, the screw pump body provided with a material inlet neck, a filter grid fixed in the material inlet neck provided in the material inlet neck, a filter disc slidably connected to the material inlet neck provided above the filter grid, and filter holes provided on the filter disc, dredging thorns corresponding to the filter holes provided on the filter grid, and an elastic member provided between the filter disc and the filter grid. Since the feed port of the screw pump is generally connected to a long conveying pipeline, the filter screen provided in the feed port is difficult to disassemble and clean, and is easily clogged after long-term use. Utility Model Content

[0003] The purpose of the utility model is to provide a screw pump filtering mechanism, which solves the problem that the feed port of the screw pump is generally connected to a long conveying pipeline, which makes the filter screen arranged in the feed port difficult to disassemble and clean, and is easily blocked after long-term use.

[0004] In order to achieve the above object, the utility model provides a screw pump filtering mechanism, which is arranged at the feed inlet of the screw pump;

[0005] The screw pump filtering mechanism includes a feed hopper arranged on the feed port, an annular resistance portion is formed on the inner wall of the feed hopper, a filter screen is arranged above the annular resistance portion, and compression strips are arranged on both sides of the filter screen. An opening is provided at the upper end of the feed hopper, and a cap is detachably provided on the opening. A spring is provided on the inner wall of the cap so that the spring can interfere with the upper end surface of the compression strip. The side of the feed hopper is connected to a connecting flange.

[0006] Preferably, the upper end of the compression strip is formed with a bending structure.

[0007] Preferably, an inner wall of the cap is formed with an internal thread structure, and an outer wall of the feed hopper is formed with an external thread structure that matches the internal thread structure.

[0008] Preferably, a rotating shaft is rotatably provided on the cap, and a scraper arranged horizontally is connected to the lower end of the rotating shaft, and the scraper is in contact with the surface of the filter screen.

[0009] Preferably, the upper end of the rotating shaft extends out of the cover cap and is connected to a handle.

[0010] Preferably, a hole is provided in the middle of the cap, a sealing sleeve is provided in the hole, and the rotating shaft is at least partially rotatably provided in the sealing sleeve.

[0011] The filter mechanism of the present invention is a kind of filter mechanism of a screw pump, and the filter mechanism of the screw pump is arranged at the feed inlet of the screw pump; the filter mechanism of the screw pump comprises a feed hopper arranged on the feed inlet, the inner wall of the feed hopper is formed with an annular resistance portion, a filter screen is arranged above the annular resistance portion, compression strips are arranged on both sides of the filter screen, the upper end of the feed hopper is provided with an opening, a cover cap is detachably provided on the opening, a spring is provided on the inner wall of the cover cap so that the spring can conflict with the upper end surface of the compression strip, and the side of the feed hopper is connected with a connecting flange; when in action, the connecting flange is connected with a conveying pipe, and the liquid enters the pump body after passing through the filter screen, and the filter screen here is pressed and fixed by the spring on the cover cap, and the cover cap can be opened regularly to take out the filter screen for cleaning. The filter mechanism of the present invention can not only filter the liquid feed, but also make the filter screen easy to take out for regular cleaning.

[0012] Other features and advantages of the present invention will be described in detail in the subsequent detailed description of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention but do not constitute a limitation of the present invention. In the accompanying drawings:

[0014] Figure 1 This is a structural diagram of the screw pump filtration mechanism provided by the utility model;

[0015] Figure 2 This is the internal structure diagram of the screw pump filter mechanism provided by the utility model;

[0016] Figure 3 It is a cross-sectional view of the screw pump filtering mechanism provided by the utility model.

[0017] Description of Reference Numerals

[0018] 1-screw pump; 2-feed port; 3-feed hopper; 4-cover cap; 5-handle; 6-rotating shaft; 7-sealing sleeve; 8-scraper; 9-annular support part; 10-filter screen; 11-pressure strip; 12-spring; 13-connecting flange. DETAILED DESCRIPTION

[0019] The following is a detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention.

[0020] like Figure 1-3 As shown: The utility model provides a screw pump filtering mechanism, which is arranged at the feed port 2 of the screw pump 1; the screw pump filtering mechanism includes a feed hopper 3 arranged on the feed port 2, and the inner wall of the feed hopper 3 is formed with an annular resistance portion 9, and a filter screen 10 is arranged above the annular resistance portion 9, and compression strips 11 are arranged on both sides of the filter screen 10. The upper end of the feed hopper 3 is provided with an opening, and a cap 4 is detachably provided on the opening. The inner wall of the cap 4 is provided with a spring 12, so that the spring 12 can conflict with the upper end surface of the compression strip 11, and the side of the feed hopper 3 is connected with a connecting flange 13. When in operation, a delivery pipe is connected to the connecting flange, and the liquid enters the pump body after passing through the filter screen. The filter screen here is pressed and fixed by the compression strip by the spring on the cover cap. The cover cap can be opened regularly and the filter screen can be taken out for cleaning. The screw pump filter mechanism provided by the utility model can not only filter the liquid feed, but also make the filter screen easy to take out for regular cleaning.

[0021] In a preferred embodiment of the present invention, in order to facilitate lifting the compression strip to pull out the filter screen, a bending structure is formed at the upper end of the compression strip 11 .

[0022] In a preferred embodiment of the present invention, in order to facilitate installation and removal of the cap, the inner wall of the cap 4 is formed with an internal thread structure, and the outer wall of the feed hopper 3 is formed with an external thread structure that matches the internal thread structure.

[0023] In a preferred embodiment of the present invention, the cap 4 is rotatably provided with a rotating shaft 6, the lower end of which is connected to a horizontally arranged scraper 8, which contacts the surface of the filter 10. When the screw pump is not used for a long time, the rotating shaft can be rotated to temporarily scrape away adherents on the surface of the filter to facilitate smooth circulation. Alternatively, the cap can be opened as a whole, and the filter can be removed for cleaning.

[0024] In a preferred embodiment of the present invention, in order to facilitate the rotation of the shaft, the upper end of the shaft 6 extends out of the cover cap 4 and is connected to a handle 5.

[0025] In a preferred embodiment of the present invention, in order to improve the sealing performance between the rotating shaft and the cap, a hole is provided in the middle of the cap 4, a sealing sleeve 7 is provided in the hole, and the rotating shaft 6 is at least partially rotatably provided in the sealing sleeve 7.

[0026] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the scope of protection of the present invention.

[0027] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0028] In addition, the various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A screw pump filter mechanism, characterized in that: The screw pump filtering mechanism is arranged at the feed inlet (2) of the screw pump (1); The screw pump filtering mechanism includes a feed hopper (3) arranged on the feed port (2), an annular stopper (9) is formed on the inner wall of the feed hopper (3), a filter screen (10) is arranged above the annular stopper (9), and compression strips (11) are arranged on both sides of the filter screen (10). An opening is provided at the upper end of the feed hopper (3), and a cap (4) is detachably provided on the opening. A spring (12) is provided on the inner wall of the cap (4), so that the spring (12) can contact the upper end face of the compression strip (11), and a connecting flange (13) is connected to the side of the feed hopper (3).

2. The screw pump filter mechanism according to claim 1, characterized in that: The upper end of the compression strip (11) is formed with a bent structure.

3. The screw pump filter mechanism according to claim 2, characterized in that: An internal thread structure is formed on the inner wall of the cap (4), and an external thread structure that matches the internal thread structure is formed on the outer wall of the feed hopper (3).

4. The screw pump filter mechanism according to claim 3, characterized in that: The cap (4) is rotatably provided with a rotating shaft (6), the lower end of the rotating shaft (6) is connected to a scraper (8) arranged in a horizontal direction, and the scraper (8) contacts the surface of the filter screen (10).

5. The screw pump filter mechanism according to claim 4, characterized in that: The upper end of the rotating shaft (6) extends out of the cover cap (4) and is connected to a handle (5).

6. The screw pump filter mechanism according to claim 5, characterized in that: A hole is provided in the middle of the cover cap (4), a sealing sleeve (7) is provided in the hole, and the rotating shaft (6) is at least partially rotatably provided in the sealing sleeve (7).

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