Hose pump shell

Abstract

The utility model discloses a hose pump casing, which relates to the field of hose pumps, and comprises a circumferential enclosure bulkhead and a rear end cover which form the pump casing, the circumferential enclosure bulkhead comprises an upper straight line section and a lower straight line section which are connected to two ends of a semi-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 utility model 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 whose basic structure includes a pump housing and a hose placed inside the pump housing. The utility model patent entitled "Hose Pump Housing" (document number CN206555122U) discloses a hose pump housing including a circumferential wall and a rear end cover.

[0003] However, the pump casings in the above literature still have the following disadvantages in practical applications: Figure 1 As shown, the two ends of the hose are respectively connected to the holes on the hose holder C and the hose holder D, and are fixed by an external flange structure. The other parts of the hose are arranged in a 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 holder C to the hose holder D. The hose between the hose holder C and the roller squeezing position will be in a stretched state in the direction of the pipe length, and the hose between the roller squeezing position and the hose holder D will be in a compressed state in the direction of the pipe length. When the roller moves to position A, the hose will be twisted and bent due to accumulation between position A and the hose holder D. At the same time, due to the constraint of the hose holder D on the hose, the pipe diameter is maintained. Therefore, the pressure in the hose between position A and the hose holder D cannot be transported in time, resulting in a sharp increase in the pressure in this section of the hose. The frequent pressure increases and decreases will cause fatigue of the hose, which will not only lose its recovery elasticity but also have the hidden danger of rupture at any time. Utility Model Content

[0004] The utility model aims to provide a hose pump housing, which reduces hose stress through a hollow design, thereby increasing the service life of the hose.

[0005] The utility model 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 segment and a lower straight segment connected at both ends of a semicircular arc segment, and a small arc segment arranged between the upper straight segment and the lower straight segment, an upper concave portion is provided on the upper straight segment near the connection of the semicircular arc segments and / or a lower concave portion is provided on the lower straight 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 providing 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. At the same time, it also avoids 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 This is a 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 upper middle concave part;

[0010] Figure 3 2 is a cross-sectional view of the pump housing in Example 1 of the present invention;

[0011] Figure 4 This is a cross-sectional view of the pump casing in Example 2 of the present invention. DETAILED DESCRIPTION Example 1

[0012] 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 at both ends of a semicircular arc segment 11, and a small arc segment 14 provided between the upper straight segment 12 and the lower straight segment 13. An upper recess 121 is provided on the upper straight segment 12 near the connection of the semicircular arc segments 11, and / or a lower recess 131 is provided on the lower straight segment 13 near the connection of the semicircular arc segments 11.

[0013] 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 the various selection methods of users.

[0014] like Figure 3As shown, by providing an upper recess 121 on the upper straight section 12, when the rotor rotates clockwise and the roller squeezes the hose, the material conveying direction is also clockwise. When the roller moves to position A, due to the provision of the upper recess 121, the gathered hose squeezed by the roller to the upper straight section 12 is stretched out in the space provided by the upper recess 121, thereby avoiding the hose located at the upper straight section 12 from expanding, bending, or twisting downward or in the front-to-back direction due to the upper side pipe 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.

[0015] 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 may invade the expansion space reserved for the hose or even damage the pipe 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.

[0016] Preferably, the upper recess 121 is in the shape of a square hole, with the two hole edges perpendicular to the length of the tube tilted toward the outside of the pump casing; the lower recess 131 is in the shape of a square hole, with the two hole edges perpendicular to the length of the tube 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 accumulation deformation at this position and is conducive to guiding the hose to move toward the vacant area reserved by the upper recess 121 or the lower recess 131, or making the circumferential expansion deformation of the hose section at the upper recess 121 or the lower recess 131 uniform and symmetrical, thereby avoiding the phenomenon of severe stress concentration in the local area of ​​the hose and aggravating the serious consequence of a sudden increase in local unidirectional force on the hose.

[0017] The edges of the holes of the upper concave portion 121 and the lower concave portion 131 tilted toward the outside of the pump casing are curved; the above-mentioned hole edges tilted toward the outside of the pump casing form an arc angle R; such a setting 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 improving the service life of the hose.

[0018] Furthermore, the upper concave portion 121 is provided with first reinforcing ribs 122 above the two hole edges perpendicular to the tube length direction; the lower concave portion 131 is also provided with second reinforcing ribs 132 below the two hole edges perpendicular to the tube length direction; the provision of the first reinforcing ribs 122 is used to increase the strength of the two hole edges perpendicular to the tube length direction, and to provide an installation position for the nameplate.

[0019] An upper hose fixing seat 15 is provided at the end of the upper straight section 12 away from the semicircular arc section 11, and a lower hose fixing seat 16 is provided at the 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 then is 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 then fixed by the external flange structure.

[0020] 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 length direction. Example 2

[0021] See also Figure 4 As shown, a hose pump casing 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 cavity are symmetrically arranged and the concave surfaces smoothly transition to the upper straight segment 12 and the lower straight segment 13; an arc angle R is provided between the concave surfaces and the upper straight segment 12 and the lower straight segment 13 respectively; such an arrangement makes the upper recess 121 and the lower recess 131 in a closed state, which can prevent creatures such as mice and snakes from entering the pump casing through the upper recess 121 and the lower recess 131 and causing damage to the hose, and can also guide the hose to enter the upper recess 121 or the lower recess 131, and the hose in the concave cavity undergoes uniform and symmetrical diameter expansion deformation in its circumferential range, thereby avoiding the phenomenon of local severe stress concentration in the hose.

[0022] A through hole is provided in the concave cavity of the lower concave portion 131 ; the provision 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.

[0023] The circumferential wall 10 is arched upward at the location of the upper recess 121; the circumferential wall 10 is arched downward at the location of the lower recess 131; such an arrangement increases the depth of the cavity while ensuring the same wall thickness of the circumferential 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 at both ends of a semicircular arc segment (11), and a small arc segment (14) disposed 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 segments (11) and / or a lower concave portion (131) is provided on the lower straight segment (13) near the connection of the semicircular arc segments (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) are through holes that penetrate 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 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 edges of the holes 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 first reinforcing ribs (122) above the two hole edges perpendicular to the tube length direction; the lower concave portion (131) is also provided with second 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 section (12) and the lower straight section (13).

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

9. The hose pump housing according to claim 7, characterized in that: The circumferential surrounding wall (10) is arched upward at the location of the upper concave portion (121); and the circumferential surrounding wall (10) is arched downward at the location of the lower concave portion (131).

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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