Hose pump shell

Abstract

The invention discloses a hose pump shell, and relates to the field of hose pumps, the hose pump shell comprises a circumferential enclosure bulkhead and a rear end cover which form the pump shell, the circumferential enclosure bulkhead comprises an upper straight line section and a lower straight line section which are connected to the two ends of a semicircular arc section, and a small arc section arranged between the upper straight line section and the lower straight line section; an upper concave part is arranged on the upper straight line section close to the connection part of the semicircular arc sections and / or a lower concave part is arranged on the lower straight line section close to the connection part of the semicircular arc sections; and the twisting, extruding and arc bending phenomena caused by accumulation of the hose at the upper straight line section or the lower straight line section are avoided.

Description

Technical Field

[0001] The invention relates to the field of hose pumps, in particular to a hose pump casing. Background Art

[0002] A hose pump is a material conveying device, and its basic structure includes a pump housing and a hose placed in the pump housing. A utility model patent named "hose pump housing" (document number CN206555122U) discloses a hose pump housing, including a circumferential wall and a rear end cover;

[0003] However, the pump casing in the above literature still has the following disadvantages in practical application: Figure 1 As shown, the two ends of the hose are respectively connected to the holes on the hose fixing seat C and the hose fixing seat D and are passed through and fixed by an external flange structure. The other parts of the hose are arranged in a close-fitting manner along the inner wall of the circumferential wall, so that only the two ends of the hose are in a fixed state. When the rotor rotates clockwise and the roller squeezes the hose, the material is transported in the hose along the direction from the hose fixing seat C to the hose fixing seat D. The hose between the hose fixing seat C and the roller squeezing position will be in a stretched state in the direction of the tube length, and the hose between the roller squeezing position and the hose fixing seat D will be in a compressed state in the direction of the tube length. When the roller moves to position A, the hose is twisted and bent due to accumulation between position A and the hose fixing seat D. At the same time, due to the constraint of the hose fixing seat D on the hose, the diameter of the hose is maintained. Therefore, the pressure in the section of the hose between position A and the hose fixing seat D increases sharply due to the inability to transport the medium in time. The frequent pressure increase and decrease causes fatigue of the hose, which not only loses its recovery elasticity but also has the hidden danger of rupture at any time. Summary of the invention

[0004] The object of the present invention is to provide a hose pump housing, which reduces hose stress through a hollow design to increase the service life of the hose.

[0005] The present invention can be implemented through the following technical scheme: a hose pump casing, including a circumferential wall and a rear end cover constituting the pump casing, the circumferential wall including an upper straight line segment and a lower straight line segment connected at both ends of a semicircular arc segment, and a small arc segment arranged between the upper straight line segment and the lower straight line segment, an upper recess is arranged on the upper straight line segment near the connection of the semicircular arc segments and / or a lower recess is arranged on the lower straight line segment near the connection of the semicircular arc segments.

[0006] Compared with the prior art, the present invention has the following beneficial effects:

[0007] By arranging an upper concave portion on the upper straight section and / or a lower concave portion on the lower straight section, the squeezed hose can be stretched out at the upper concave portion or the lower concave portion, thereby avoiding twisting and bending of the hose caused by accumulation at the upper straight section or the lower straight section, and also avoiding the problem of a sharp increase in pressure in the hose section due to the inability to transport the medium in time, thereby improving the working environment of the hose and ensuring the normal use of the hose. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of a partial cross-sectional structure of a pump casing in the prior art;

[0009] Figure 2 Schematic diagram of the internal structure of the pump casing in the present invention, Figure 2A yes Figure 2 A partial enlarged view of the middle and upper concave part;

[0010] Figure 3 It is a cross-sectional view of the pump housing in Example 1 of the present invention;

[0011] Figure 4 It is a cross-sectional view of the pump casing in Example 2 of the present invention. DETAILED DESCRIPTION

[0012] Example 1

[0013] See also Figure 2-3 As shown, a hose pump housing includes an integrally formed circumferential wall 10 and a rear end cover 20, the circumferential wall 10 includes an upper straight segment 12 and a lower straight segment 13 connected to both ends of a semicircular arc segment 11, and a small arc segment 14 arranged between the upper straight segment 12 and the lower straight segment 13, an upper concave portion 121 is arranged on the upper straight segment 12 near the connection of the semicircular arc segments 11, and / or a lower concave portion 131 is arranged on the lower straight segment 13 near the connection of the semicircular arc segments 11;

[0014] In the above scheme, the material can enter from the hose at the upper straight section 12 and then be discharged from the hose at the lower straight section 13. The material can also enter from the hose at the lower straight section 13 and then be discharged from the hose at the upper straight section 12. Therefore, the pump casing can be provided with an upper recess 121 only on the upper straight section 12 near the connection of the semicircular arc section 11, or a lower recess 131 only on the lower straight section 13 near the connection of the semicircular arc section 11. The upper recess 121 can also be provided on the upper straight section 12 and the lower recess 131 can be provided on the lower straight section 13 at the same time. The above three specific implementation schemes provide users with convenient choices for selecting the corresponding upper end, lower end, or upper and lower ends of the hose to be exchanged as the medium input end. Selecting the latter can meet various selection methods of users.

[0015] like Figure 3As shown, by setting an upper recess 121 on the upper straight section 12, when the rotor rotates clockwise and the roller squeezes the hose, the conveying direction of the material is also clockwise. When the roller moves to position A, due to the setting of the upper recess 121, the gathered hose squeezed to the upper straight section 12 by the roller is stretched out in the space provided by the upper recess 121, thereby preventing the hose located at the upper straight section 12 from expanding, bending, and twisting downward or in the front-to-back direction due to the upper side tube wall being blocked by the upper straight section 12, wherein the front-to-back direction refers to the axial direction of the hose pump rotor shaft, and also avoiding the problem of a sharp increase in pressure in the hose section due to the inability to convey the medium in time, thereby improving the working environment of the hose, ensuring the normal use of the hose, and improving the fluctuation phenomenon of the medium conveying flow rate.

[0016] Preferably, the upper recess 121 and / or the lower recess 131 are through holes that penetrate the wall thickness of the upper straight segment 12 and the lower straight segment 13; on the one hand, the upper recess 121 and the lower recess 131 in the through hole state can avoid the twisting and bending caused by the accumulation of the hose below the upper straight segment 12 and above the lower straight segment 13, thereby improving the working environment of the hose; on the other hand, when the upper recess 121 and the lower recess 131 are selected as a hole solution, the heat dissipation performance of the hose pump can be improved, and when the lower recess 131 is set as a hole solution, it can avoid the accumulation of dust, particles and other debris therein, which will invade the expansion space reserved for the hose or even damage the tube wall; furthermore, the upper recess 121 and the lower recess 131 in the through hole state can reduce the overall weight of the pump casing.

[0017] Preferably, the upper recess 121 is in the shape of a square hole, and the two hole edges located perpendicular to the length of the tube are tilted toward the outside of the pump casing; the lower recess 131 is in the shape of a square hole, and the two hole edges located perpendicular to the length of the tube are tilted toward the outside of the pump casing; such an arrangement makes the upper recess 121 present a state with a small upper opening and a large lower opening, which is adapted to the shape of the hose after the accumulation deformation at this position and is conducive to guiding the hose to move to the vacant area reserved by the upper recess 121 or the lower recess 131, or to make the circumferential expansion deformation of the hose section at the upper recess 121 or the lower recess 131 be uniform and symmetrical, thereby avoiding the phenomenon of severe stress concentration in the local area of ​​the hose and aggravating the serious consequence of the sudden increase in local unidirectional force on the hose.

[0018] The hole edges of the upper concave portion 121 and the lower concave portion 131 tilted toward the outside of the pump casing are in an arc shape; the hole edges tilted toward the outside of the pump casing form an arc angle R; such a configuration allows the two hole edges in the pipe length direction to smoothly transition to the outside of the pump casing, and guides the outer wall of the hose to smoothly enter the upper concave portion 121 or the lower concave portion 131, avoiding the two hole edges in the pipe length direction from causing indentations on the outer wall of the hose, having a certain protective effect on the outer wall of the hose, and being beneficial to increasing the service life of the hose.

[0019] Furthermore, the upper concave portion 121 is provided with reinforcing ribs 122 above the two hole edges perpendicular to the tube length direction; the lower concave portion 131 is also provided with reinforcing ribs 132 below the two hole edges perpendicular to the tube length direction; the reinforcing ribs 122 are provided to increase the strength of the two hole edges perpendicular to the tube length direction, and to provide an installation position for the nameplate installation;

[0020] An upper hose fixing seat 15 is provided at one end of the upper straight section 12 away from the semicircular arc section 11, and a lower hose fixing seat 16 is provided at one end of the lower straight section 13 away from the semicircular arc section 11; the hose is arranged in a close-fitting manner along the inner wall of the circumferential wall 10, one end of the hose passes through the hole on the upper hose fixing seat 15 and is then fixed by an external flange structure, and the other end of the hose is connected to the hole on the lower hose fixing seat 16 and passes through it and is then fixed by an external flange structure.

[0021] In the present application, the edges of the upper concave portion 121 and the lower concave portion 131 that are consistent with the straight direction of the hose are arc-shaped transitions to avoid the edges from marking the hose in the direction of the tube length.

[0022] Example 2

[0023] See also Figure 4 As shown, a hose pump housing is different from Example 1 in that: the upper recess 121 is a concave cavity with an opening facing downward, or the lower recess 131 is a concave cavity with an opening facing upward, the concave surfaces on both sides of the bottom of the concave cavity are symmetrically arranged and smoothly transition to the upper straight line segment 12 and the lower straight line segment 13; an arc angle R is provided between the concave surfaces and the upper straight line segment 12 and the lower straight line segment 13 respectively; such an arrangement makes the upper recess 121 and the lower recess 131 in a closed state, which can prevent mice, snakes and other creatures from entering the pump housing through the upper recess 121 and the lower recess 131 and causing damage to the hose, and at the same time can also guide the hose to enter the upper recess 121 or the lower recess 131, and the hose in the concave cavity produces uniform and symmetrical diameter expansion deformation in its circumferential range, thereby avoiding the phenomenon of local severe stress concentration in the hose.

[0024] A through hole is arranged in the concave cavity of the lower concave portion 131 ; the arrangement of the small hole can prevent dust, particles and other debris from gathering in the lower concave portion 131 , so that the expansion space reserved for the hose can play its due role.

[0025] The circumferential side wall 10 is arched upward at the location of the upper recess 12; the circumferential side wall 10 is arched downward at the location of the lower recess 13; such an arrangement increases the depth of the cavity while ensuring the same wall thickness of the circumferential side wall 10, making it easier for the hose to enter the upper recess 121 and the lower recess 131.

Claims

1. A hose pump housing, comprising a circumferential wall (10) and a rear end cover (20) constituting the pump housing, wherein the circumferential wall (10) comprises an upper straight segment (12) and a lower straight segment (13) connected to both ends of a semicircular arc segment (11), and a small arc segment (14) arranged between the upper straight segment (12) and the lower straight segment (13), characterized in that: An upper concave portion (121) is provided on the upper straight segment (12) near the connection of the semicircular arc segment (11) and / or a lower concave portion (131) is provided on the lower straight segment (13) near the connection of the semicircular arc segment (11).

2. The hose pump housing according to claim 1, characterized in that: The upper concave portion (121) and / or the lower concave portion (131) is a through hole that penetrates the wall thickness of the upper straight section (12) and the lower straight section (13).

3. The hose pump housing according to claim 2, characterized in that: The upper recess (121) is in the shape of a square hole, and the two hole edges perpendicular to the length direction of the pipe are tilted toward the outside of the pump casing.

4. The hose pump housing according to claim 2, characterized in that: The lower recess (131) is in the shape of a square hole, and the two hole edges perpendicular to the length direction of the pipe are tilted toward the outside of the pump casing.

5. The hose pump housing according to claim 3 or 4, characterized in that: The hole edges of the upper concave portion (121) and the lower concave portion (131) tilted toward the outside of the pump casing are in an arc shape.

6. The hose pump housing according to claim 5, characterized in that: The upper concave portion (121) is provided with reinforcing ribs (122) above the two hole edges perpendicular to the tube length direction; the lower concave portion (131) is also provided with reinforcing ribs (132) below the two hole edges perpendicular to the tube length direction.

7. The hose pump housing according to claim 1, characterized in that: The upper concave portion (121) is a concave cavity with an opening facing downward, or the lower concave portion (131) is a concave cavity with an opening facing upward, and the concave surfaces on both sides of the bottom of the concave cavity are symmetrically arranged and smoothly transition to the upper straight line segment (12) and the lower straight line segment (13).

8. The hose pump housing according to claim 7, characterized in that: A through hole is arranged in the concave cavity of the lower concave portion (131).

9. The hose pump housing according to claim 7, characterized in that: The circumferential side wall (10) is arched upward at the location where the upper concave portion (12) is located; and the circumferential side wall (10) is arched downward at the location where the lower concave portion (13) is located.

10. The hose pump housing according to claim 1, characterized in that: An upper hose fixing seat (15) is provided at one end of the upper straight section (12) away from the semicircular arc section (11), and a lower hose fixing seat (16) is provided at one end of the lower straight section (13) away from the semicircular arc section (11).

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