Improved structure of sewage treatment pump

Abstract

The utility model relates to an improved structure of a sewage treatment pump, which belongs to the technical field of pump body structures, and comprises a pump shell, a rotating drum, a pushing ring, an elastic sheet, a fixed sealing sleeve and a movable sealing sleeve, the rotating drum can rotate, the pushing ring does linear motion in the rotating drum under the rotating action of the rotating drum, the outer end face of the elastic sheet is propped against the pushing ring, and the fixed sealing sleeve is sleeved with the movable sealing sleeve. One end of the fixed sealing sleeve abuts against the inner end face of the elastic piece, a gap is formed between the other end of the fixed sealing sleeve and the pump shell, the fixed sealing sleeve is sleeved with the movable sealing sleeve, the movable sealing sleeve abuts against the interior of the pump shell, a first sealing piece is arranged between the movable sealing sleeve and the fixed sealing sleeve, and a rotating shaft is sleeved with the movable sealing sleeve. A second sealing piece is arranged between the movable sealing sleeve and the rotating shaft; the sealing structure has the beneficial effects that the first sealing element is sealed between the movable sealing sleeve and the fixed sealing sleeve, and the second sealing element is sealed between the movable sealing sleeve and the rotating shaft, so that a medium in the pump shell is prevented from leaking.

Description

Technical Field

[0001] The utility model relates to the technical field of pump body structures, and particularly relates to an improved structure of a sewage treatment pump. Background Art

[0002] Sewage treatment pumps play a crucial role in the sewage treatment process. They are mainly used to transport various impurities, suspended solids, and sewage with certain corrosiveness in sewage. Sewage treatment pumps are usually applied to the treatment of industrial sewage or domestic sewage. When the sewage pump works, sewage will enter the inside of the pump shell. If the sewage in the pump shell leaks, it will pollute the external environment and does not meet the development requirements of energy conservation and environmental protection.

[0003] During the process of the sewage treatment pump transporting sewage, the pump shell and the rotating shaft rotate relative to each other. Therefore, there will be a certain gap between them. In order to prevent the transported medium from leaking out along this gap, a sealing structure is generally set between the rotating shaft and the pump shell of the sewage pump to prevent the sewage in the pump shell from leaking out. Therefore, it is urgent to improve the existing structure of the sewage treatment pump to solve the above problems. Summary of the Utility Model

[0004] The utility model provides an improved structure of a sewage treatment pump to solve the technical problem of the sealing performance of the sewage treatment pump. A first seal is sealed between the dynamic seal sleeve and the static seal sleeve, and a second seal is sealed between the dynamic seal sleeve and the rotating shaft to prevent the sewage in the pump shell from leaking.

[0005] To achieve the above purpose, the utility model is realized through the following technical solutions:

[0006] An improved structure of a sewage treatment pump, comprising:

[0007] A pump shell;

[0008] A rotating cylinder that can rotate;

[0009] A pushing ring, and the pushing ring makes a linear motion in the rotating cylinder under the action of the rotation of the rotating cylinder;

[0010] An elastic sheet, and the outer end surface of the elastic sheet abuts against the pushing ring;

[0011] A static seal sleeve, one end of the static seal sleeve abuts against the inner end surface of the elastic sheet, and there is a gap between the other end of the static seal sleeve and the pump shell;

[0012] A dynamic seal sleeve, the outside of the dynamic seal sleeve is sleeved inside the static seal sleeve, the dynamic seal sleeve abuts inside the pump shell, there is a first seal between the dynamic seal sleeve and the static seal sleeve, a rotating shaft is sleeved inside the dynamic seal sleeve, and there is a second seal between the dynamic seal sleeve and the rotating shaft;

[0013] Through the rotation of the rotary drum, the pushing ring moves linearly along the axis of the rotary drum. The pushing ring squeezes the elastic sheet, and the elastic sheet squeezes the fixed sealing sleeve. The fixed sealing sleeve moves linearly, enabling the first seal to be sealed between the moving sealing sleeve and the fixed sealing sleeve, and the second seal is sealed between the moving sealing sleeve and the rotating shaft.

[0014] Optionally, a convex ring portion is provided on the pump housing, and the inner peripheral wall of the rotary drum rotates detachably relative to the outer peripheral wall of the convex ring portion.

[0015] Optionally, the pushing ring is located inside the rotary drum. Through the detachable rotation of the rotary drum relative to the convex ring portion, the rotary drum pushes the pushing ring to move linearly.

[0016] Optionally, a pushing ring is provided inside the rotary drum, and the pushing ring pushes the pushing ring to move linearly.

[0017] Optionally, a sealing cavity is formed inside the fixed sealing sleeve, and a sealing block is provided on the outside of the moving sealing sleeve. The sealing block is arranged in the sealing cavity.

[0018] Optionally, a first sealing groove is formed on the inner side wall of the sealing cavity, and a first seal is provided in the first sealing groove. The linear movement of the fixed sealing sleeve enables the first seal to seal the first gap between the moving sealing sleeve and the fixed sealing sleeve.

[0019] Optionally, the rotating shaft rotates relative to the moving sealing sleeve. A second sealing groove is formed inside the moving sealing sleeve, and a second seal is provided in the second sealing groove. The rotating shaft rubs against the second seal, and the material of the second seal is polytetrafluoroethylene.

[0020] Optionally, the pushing ring has a ring body, and a push post is provided on one end face of the ring body. The axis line of the push post coincides with the geometric center of a certain cross-section of the first seal.

[0021] Optionally, the material of the elastic sheet is nitrile rubber, which facilitates the fixed sealing sleeve to receive the extrusion force of the pushing ring.

[0022] Optionally, the length of the gap in the length direction of the rotary drum is greater than the sum of the length of the first gap and the length of the second gap in the length direction of the rotary drum.

[0023] Advantages of the utility model:

[0024] The forward rotation of the rotary drum of the present utility model drives the pushing ring to move linearly to the right, that is, the forward rotation of the rotary drum enables the pushing ring provided in the rotary drum to drive the pushing ring to move linearly to the right. The pushing ring presses the elastic sheet, the elastic sheet presses the fixed sealing sleeve, and the fixed sealing sleeve moves linearly to the right, so that the first sealing member seals between the moving sealing sleeve and the fixed sealing sleeve, realizing the sealing function. At the same time, during the rotation of the rotating shaft, the rotating shaft rotates relative to the moving sealing sleeve, and the second sealing member seals the part between the moving sealing sleeve and the rotating shaft. The material of the second sealing member is polytetrafluoroethylene, so that during the rotation of the rotating shaft relative to the moving sealing sleeve, the second sealing member can be wear-resistant and the part of the second sealing member that seals between the moving sealing sleeve and the rotating shaft realizes the sealing function, solving the technical problem of the sealing performance of the sewage treatment pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0026] Figure 1 It is a schematic cross-sectional structure view in the main viewing direction of the present utility model;

[0027] Figure 2 For the present utility model Figure 1 Partial enlarged structure view of part A;

[0028] Figure 3 It is a three-dimensional structure diagram of the rotary drum of the present utility model;

[0029] Figure 4 It is a three-dimensional structure diagram of the pushing ring of the present utility model.

[0030] Reference numerals: 1 - pump housing, 2 - rotary drum, 21 - rotary drum cavity, 3 - pushing ring, 31 - ring body, 32 - push post, 33 - inner hole, 4 - pushing ring, 5 - elastic sheet, 6 - fixed sealing sleeve, 61 - sealing cavity, 62 - first gap, 63 - first sealing groove, 64 - second gap, 7 - convex ring portion, 8 - moving sealing sleeve, 81 - second sealing groove, 82 - sealing block, 9 - rotating shaft, 10 - gap, 11 - first sealing member, 12 - second sealing member. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The following will describe the embodiments of the present application in detail with reference to the drawings.

[0032] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0033] The terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "a plurality" is two or more.

[0034] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it can be welding, bolt connection, or riveting; it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0035] Embodiment 1:

[0036] As Figure 1 shown, the present embodiment provides an improved structure of a sewage treatment pump, including: a pump housing 1, a rotating cylinder 2, a pushing ring 3, an elastic sheet 5, a fixed sealing sleeve 6, and a moving sealing sleeve 8. The rotating cylinder 2 can rotate, and the pushing ring 3 makes a linear motion in the rotating cylinder 2 under the action of the rotation of the rotating cylinder 2. The outer end surface of the elastic sheet 5 abuts against the pushing ring 3, one end of the fixed sealing sleeve 6 abuts against the inner end surface of the elastic sheet 5, and there is a gap 10 between the other end of the fixed sealing sleeve 6 and the pump housing 1;

[0037] The outside of the moving sealing sleeve 8 is sleeved inside the fixed sealing sleeve 6, the moving sealing sleeve 8 abuts against the inside of the pump housing 1, there is a first sealing member 11 (the first sealing member 11 is a circular structure) between the moving sealing sleeve 8 and the fixed sealing sleeve 6, a rotating shaft 9 is sleeved inside the moving sealing sleeve 8, and there is a second sealing member 12 (the second sealing member 12 is an annular structure) between the moving sealing sleeve 8 and the rotating shaft 9;

[0038] Through the rotation of the rotary drum 2, the pushing ring 3 moves linearly along the axis of the rotary drum 2. The pushing ring 3 squeezes the elastic sheet 5, and the elastic sheet 5 squeezes the fixed sealing sleeve 6. The fixed sealing sleeve 6 moves linearly, so that the first seal 11 is sealed between the moving sealing sleeve 8 and the fixed sealing sleeve 6, and is sealed between the moving sealing sleeve 8 and the rotating shaft 9 through the second seal 12.

[0039] Specifically, a convex ring portion 7 is provided on the pump housing 1. The inner peripheral wall of the rotary drum 2 is provided with internal threads, and the outer peripheral wall of the convex ring portion 7 is provided with external threads. The inner peripheral wall of the rotary drum 2 and the outer peripheral wall of the convex ring portion 7 are in threaded engagement. As Figure 3 shown, the inside of the rotary drum 2 has a rotary drum cavity 21, and the convex ring portion 7 is accommodated in the rotary drum cavity 21. The inner peripheral wall of the rotary drum 2 is rotatably detachable relative to the outer peripheral wall of the convex ring portion 7, that is, the rotary drum 2 can rotate forward and backward relative to the convex ring portion 7.

[0040] Embodiment 2:

[0041] Based on Embodiment 1, as Figure 1 shown, the pushing ring 3 is located inside the rotary drum 2. Through the detachable rotation of the rotary drum 2 relative to the convex ring portion 7, the rotary drum 2 pushes the pushing ring 3 to move linearly, that is, the forward rotation of the rotary drum 2 pushes the pushing ring 3 to move linearly to the right. As Figure 3 shown, a pushing position ring 4 is provided inside the rotary drum 2. During the forward rotation of the rotary drum 2, the pushing position ring 4 pushes the pushing ring 3 to move linearly to the right.

[0042] As Figure 2 shown, a sealing cavity 61 is formed inside the fixed sealing sleeve 6. A sealing block 82 is provided outside the moving sealing sleeve 8. The sealing block 82 is arranged in the sealing cavity 61. First gaps 62 and second gaps 64 are respectively provided on the left and right sides of the sealing block 82, facilitating the left and right movement of the sealing block 82 in the sealing cavity 61, that is, during the forward rotation of the rotary drum 2, the sealing block 82 moves to the right, and during the reverse rotation of the rotary drum 2, the sealing block 82 can move to the left.

[0043] A first sealing groove 63 is formed on the inner side wall of the sealing cavity 61, and a first seal 11 is provided in the first sealing groove 63. During the forward rotation of the rotary drum 2, the fixed sealing sleeve 6 is moved to the right, and the first seal 11 seals the first gap 62 between the moving sealing sleeve 8 and the fixed sealing sleeve 6, achieving a sealing effect. That is to say, the linear movement of the fixed sealing sleeve 6 is that the forward rotation of the rotary drum 2 causes the pushing ring 3 to squeeze the elastic sheet 5, the elastic sheet 5 pushes the fixed sealing sleeve 6 to move to the right, and the rightward movement of the fixed sealing sleeve 6 enables the first seal 11 to seal the first gap 62 between the moving sealing sleeve 8 and the fixed sealing sleeve 6.

[0044] The rotating shaft 9 rotates relative to the dynamic seal sleeve 8. A second seal groove 81 is formed inside the dynamic seal sleeve 8, and a second seal member 12 is provided in the second seal groove 81. The rotating shaft 9 rubs against the second seal member 12. The material of the second seal member 12 is polytetrafluoroethylene, making the second seal member 12 wear-resistant.

[0045] During the rotation of the rotating shaft 9, the rotating shaft 9 rotates relative to the dynamic seal sleeve 8. The second seal member 12 seals the part between the dynamic seal sleeve 8 and the rotating shaft 9. The material of the second seal member 12 being polytetrafluoroethylene enables the second seal member 12 to be wear-resistant and seal the part between the dynamic seal sleeve 8 and the rotating shaft 9 during the rotation of the rotating shaft 9 relative to the dynamic seal sleeve 8.

[0046] Embodiment 3:

[0047] Based on Embodiment 1 - Embodiment 2, as Figure 4 shown, the push ring 3 has a ring body 31, and a push post 32 is provided on one end face of the ring body 31. As Figure 1 shown, the axis line of the push post 32 coincides with the geometric center of a certain cross-section of the first seal member 11 (e.g., coincides with the geometric center of the cross-section of the first seal member 11 on the front view section of Figure 1 ).

[0048] That is to say, the axis line of the push post 32 coincides with Figure 1 the center of the circle on the cross-section of the first seal member 11 on the front view section of Figure 1 . During the forward rotation of the rotating cylinder 2, the push ring 4 pushes the push ring 3 to move linearly to the right. The push post 32 on the push ring 3 can concentrate the thrust on the push ring 3 and apply it to the elastic sheet 5. The elastic sheet 5 facilitates the extrusion of the fixed seal sleeve 6, and the fixed seal sleeve 6 moves linearly to the right. At the same time, the concentrated thrust on the push post 32 is applied to

[0049] the center of the circle on the cross-section of the first seal member 11 on the front view section of

[0050] , facilitating better sealing of the first seal member 11 between the dynamic seal sleeve 8 and the fixed seal sleeve 6 in the first gap 62.

[0051] The material of the elastic sheet 5 is nitrile rubber, and the elastic sheet 5 can deform, facilitating the fixed seal sleeve 6 to receive the extrusion force of the push ring 3.

[0052] The length of the gap 10 in the longitudinal direction of the rotary drum 2 is greater than the sum of the length of the first gap 62 in the longitudinal direction of the rotary drum 2 and the length of the second gap 64 in the longitudinal direction of the rotary drum 2. When the rotary drum rotates forward, the function of the gap 10 is that the rightward movement of the fixed seal sleeve 6 will not cause the fixed seal sleeve 6 to collide with the pump housing 1. When the rotary drum rotates in reverse, the function of the gap 10 is that a tool can be placed in the gap 10, and the tool pushes the fixed seal sleeve 6 to move leftward.

[0053] Based on the above embodiments, the seal of the present utility model is used to prevent the medium in the pump housing 1 from leaking out of the pump housing 1 during the rotation of the rotating shaft 9.

[0054] The above is only the specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope recorded by the present utility model can easily think of changes or substitutions, which should all be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claimed rights.

Claims

1. An improved structure of a sewage treatment pump, characterized in that, Comprising: A pump housing (1); A rotating drum (2), which can rotate; A pushing ring (3), and the pushing ring (3) makes a linear motion within the rotating drum (2) under the rotational action of the rotating drum (2); An elastic sheet (5), the outer end face of the elastic sheet (5) abuts against the pushing ring (3); A fixed sealing sleeve (6), one end of the fixed sealing sleeve (6) abuts against the inner end face of the elastic sheet (5), and there is a gap (10) between the other end of the fixed sealing sleeve (6) and the pump housing (1); A movable sealing sleeve (8), the outside of the movable sealing sleeve (8) is sleeved inside the fixed sealing sleeve (6), the movable sealing sleeve (8) abuts inside the pump housing (1), there is a first seal (11) between the movable sealing sleeve (8) and the fixed sealing sleeve (6), a rotating shaft (9) is sleeved inside the movable sealing sleeve (8), and there is a second seal (12) between the movable sealing sleeve (8) and the rotating shaft (9); Under the rotational action of the rotating drum (2), the pushing ring (3) makes a linear motion along the axis of the rotating drum (2), the pushing ring (3) squeezes the elastic sheet (5), the elastic sheet (5) squeezes the fixed sealing sleeve (6), and the fixed sealing sleeve (6) can make a linear motion, so that the first seal (11) seals between the movable sealing sleeve (8) and the fixed sealing sleeve (6), and seals between the movable sealing sleeve (8) and the rotating shaft (9) through the second seal (12).

2. The improved structure of a sewage treatment pump according to claim 1, characterized in that, A convex ring portion (7) is provided on the pump housing (1), and the inner peripheral wall of the rotating drum (2) rotates detachably relative to the outer peripheral wall of the convex ring portion (7).

3. The improved structure of a sewage treatment pump according to claim 1, characterized in that, The pushing ring (3) is located inside the rotating drum (2), and through the detachable rotation of the rotating drum (2) relative to the convex ring portion (7), the rotating drum (2) pushes the pushing ring (3) to make a linear motion.

4. The improved structure of a sewage treatment pump according to claim 3, wherein, A pushing ring (4) is provided inside the rotating drum (2), and the pushing ring (4) pushes the pushing ring (3) to make a linear motion.

5. The improved structure of a sewage treatment pump according to claim 1, characterized in that, A sealing cavity (61) is formed inside the fixed sealing sleeve (6), a sealing block (82) is provided on the outside of the movable sealing sleeve (8), and the sealing block (82) is arranged inside the sealing cavity (61).

6. The improved structure of a sewage treatment pump according to claim 5, characterized in that, A first sealing groove (63) is formed on the inner side wall of the sealing cavity (61), the first seal (11) is arranged inside the first sealing groove (63), and the linear motion of the fixed sealing sleeve (6) makes the first seal (11) seal a first gap (62) between the movable sealing sleeve (8) and the fixed sealing sleeve (6).

7. The improved structure of a sewage treatment pump according to claim 1, characterized in that, The rotating shaft (9) rotates relative to the movable sealing sleeve (8), a second sealing groove (81) is formed inside the movable sealing sleeve (8), the second seal (12) is arranged inside the second sealing groove (81), the rotating shaft (9) rubs against the second seal (12), and the material of the second seal (12) is polytetrafluoroethylene.

8. The improved structure of a sewage treatment pump according to claim 1, characterized in that, The pushing ring (3) has a ring body (31), a pushing column (32) is provided on one end face of the ring body (31), and the axis of the pushing column (32) coincides with the geometric center of the cross-section of the first seal (11).

9. The improved structure of a sewage treatment pump according to claim 8, characterized in that, The material of the elastic sheet (5) is nitrile rubber, which facilitates the squeezing force of the fixed sealing sleeve (6) by the pushing ring (3).

10. The improved structure of a sewage treatment pump according to claim 1, characterized in that, The length of the gap (10) in the length direction of the rotating cylinder (2) is greater than the sum of the length of the first gap (62) in the length direction of the rotating cylinder (2) and the length of the second gap (64) in the length direction of the rotating cylinder (2).

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