Straight-through pulse damper

Abstract

A straight-through type pulse damper comprises an outer cylinder, an inner rubber pipe is arranged in the outer cylinder in a penetrating mode in the cylinder core direction, a pressure cavity is formed between the outer pipe wall of the inner rubber pipe and the inner cylinder wall of the outer cylinder, and an air inlet valve and an air outlet valve which are communicated with the pressure cavity are connected to the outer cylinder. The pipe end section, far away from the flange connecting disc, of the connecting pipe is inserted into the pipe section, extending out of the outer barrel, of the inner rubber pipe, the inner rubber pipe is sleeved with the outer rubber pipe, the coincident section, connected with the inner rubber pipe and the connecting pipe in a sleeved mode, of the outer rubber pipe is provided with a constraint hoop, and the end face of the pipe end of the outer rubber pipe and the end face of the barrel end of the outer barrel are attached to each other to form sealing fit. In this way, sealing between the connecting pipe and the inner rubber pipe is achieved, the sealing performance of the pressure cavity in the outer cylinder is guaranteed, meanwhile, sealing assembly work among the inner rubber pipe, the outer rubber pipe and the outer cylinder is conducted outside the cylinder, and overall operation is more convenient.

Description

Technical Field

[0001] The utility model relates to a pulse damper, in particular to a straight-through pulse damper. Background Art

[0002] In the past, diaphragm and airbag pulsation dampers, installed at the outlet of intermittent pumps such as piston pumps, hose pumps, and diaphragm pumps, were often used to eliminate the pulsation generated during material conveyance. These dampeners can eliminate 90% of pulsation, sufficient to meet industrial requirements. However, diaphragm and airbag pulsation dampers are typically used to convey materials with low solids content and good fluidity. They are less effective for conveying materials with high solids content, high viscosity, poor fluidity, and rapid solidification. This is because rapidly solidifying materials easily form blockages at the damper's inlet and outlet, rendering the damper ineffective. Furthermore, due to their structural characteristics, diaphragm and airbag pulsation dampers have a delayed response and poor resilience, resulting in poor effectiveness. Therefore, direct-flow pulse dampers have been designed in the prior art.

[0003] The technical solution disclosed in the patent document entitled "Straight-through Smoothing Filter" (document number CN202769165U, hereinafter referred to as Document 1) includes a tube body and a tapered outer connecting flange. The tube body is composed of an inner hose and an outer jacket, with flanges connected to both ends of the outer jacket. The inner hose of the tube body is made of an elastic polymer material with high elasticity, high wear resistance, chemical resistance, and resistance to certain pressures. The outer jacket is made of a pressure-resistant rigid metal material, forming a cavity between the inner hose and the outer jacket. One end of the straight-through smoothing filter is connected to the pump output port, and the other end is connected to the extended delivery pipe. The entire tube cavity forms an environment with relatively stable pressure and relatively continuous material flow.

[0004] The technical solution disclosed in the patent document named "Emission Pulsation Damper" (document number CN200993295Y, hereinafter referred to as Document 2) includes a pressure cylinder, a damping hose is installed in the hole of the pressure cylinder, an inner cavity is provided between the pressure cylinder and the damping hose, interface pipes are respectively connected to the holes at both ends of the damping hose, the outer diameter of the interface pipe is equipped with a locking nut, and an adjustment device is installed on the top of the pressure cylinder.

[0005] In Document 1, a pressure chamber is formed between the outer sleeve and the inner hose, while the inner hose is connected to the outer connecting flange. The end of the inner hose protrudes outward from the outer sleeve port, so that the outer connecting flange and the end face of the outer sleeve squeeze and seal the protruding portion of the inner hose, ensuring the internal sealing of the pressure chamber and the inner hose. However, because the protruding portion of the inner hose is larger than the outer sleeve port, and the damper hose's pressure resistance, the hose installation is difficult and the overall assembly operation is very inconvenient. In Document 2, although a locking nut is used to seal the interface tube and the damping hose, this only ensures the sealing of the connection between the interface tube and the damping hose. The sealing between the damping hose and the pressure cylinder cannot be guaranteed, which can easily affect the pressure environment of the pressure chamber. Summary of the Invention

[0006] The utility model provides a straight-through pulse damper, which ensures the sealing between the outer tube and the inner rubber tube and the sealing between the inner rubber tube and the connecting tube, and facilitates the mutual assembly of parts.

[0007] In order to achieve the above-mentioned purpose, the technical solution adopted is: a straight-through pulse damper, comprising an outer tube, an inner rubber tube is passed through the interior of the outer tube along the direction of the tube core, a pressure chamber is formed between the outer tube wall of the inner rubber tube and the inner tube wall of the outer tube, the outer tube is connected with an air inlet valve and an air outlet valve connected to the pressure chamber, a flange connecting plate is provided at one end of the connecting pipe, the end section of the connecting pipe away from the flange connecting plate is inserted into the section of the inner rubber tube extending to the outside of the outer tube, the outer rubber tube is sleeved on the inner rubber tube, and a constraint clamp is provided on the overlapping section of the outer rubber tube that is sleeved with the inner rubber tube and the connecting tube, the end face of the outer rubber tube and the end face of the outer tube fit together to form a sealed fit.

[0008] Compared with the prior art, the technical effect of the present invention is as follows: the end of the inner hose extends to the outside of the outer tube, and the end section of the connecting tube of the flange connecting plate is inserted into the end of the inner hose, and the outer hose is sleeved on the inner hose. The outer hose is directly constrained by a clamp to the outer hose's outer overlapping section that is sleeved with the inner hose and the connecting tube. At the same time, the end face of the outer hose and the end face of the outer tube are in close contact and sealed with each other, thus achieving a seal between the connecting tube and the inner hose and ensuring the sealing of the pressure chamber in the outer tube. At the same time, the sealing assembly work between the inner hose, the outer hose and the outer tube is all carried out outside the tube, making the overall operation more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a schematic diagram of the three-dimensional appearance of the utility model;

[0010] Figure 2 for Figure 1 K-direction view in;

[0011] Figure 3 This is a structural sectional view of the utility model;

[0012] Figure 4 for Figure 3 Schematic diagram of the local structure in;

[0013] Figure 5 It is a schematic diagram of a first embodiment of a pressure ring;

[0014] Figure 6 Schematic diagram of a second embodiment of the pressure ring. DETAILED DESCRIPTION

[0015] The following is combined with Figure 1-6 And related content, the utility model is further described in detail:

[0016] A straight-through pulse damper includes an outer tube 10, an inner rubber tube 20 is passed through the interior of the outer tube 10 along the tube core direction, a pressure chamber P is formed between the outer tube wall of the inner rubber tube 20 and the inner tube wall of the outer tube 10, the outer tube 10 is connected to an air inlet valve 11 and an air outlet valve 12 connected to the pressure chamber P, a flange connection plate 31 is provided at one end of the connecting tube 30, the end section of the connecting tube 30 away from the flange connection plate 31 is inserted into the tube section of the inner rubber tube 20 extending to the outside of the outer tube 10, an outer rubber tube 40 is sleeved on the inner rubber tube 20, and a restraining clamp 50 is provided on the overlapping section of the outer rubber tube 40 that is sleeved with the inner rubber tube 20 and the connecting tube 30, and the end face of the outer rubber tube 40 fits with the end face of the outer tube 10 to form a sealed fit.

[0017] In the above solution, the end of the inner hose 20 extends to the outside of the outer tube 10, while the end section of the connecting tube 30 of the flange connection plate 31 is inserted into the end of the inner hose 20, and the outer hose 40 is sleeved onto the inner hose 20. The outer hose 40 is directly restrained by the clamp 50 at the outer overlapping section of the outer hose 40 that is sleeved with the inner hose 20 and the connecting tube 30. At the same time, the end surface of the outer hose 40 is in close contact with the end surface of the outer tube 10, thus achieving a seal between the connecting tube 30 and the inner hose 20 and ensuring the sealing of the pressure chamber P in the outer tube 10. At the same time, the sealing assembly operation between the inner hose 20, the outer hose 40 and the outer tube 10 is all performed outside the outer tube 10, making the overall operation more convenient.

[0018] As a preferred solution, a rubber ring 41 is provided at one end of the outer rubber tube 40 near the end of the outer tube 10. The rubber ring 41 protrudes outward along the radial direction of the outer rubber tube 40 and is connected to the outer rubber tube 40 to form a connected structure. The annular ring surface of the rubber ring 41 fits with the end face of the outer tube 10. The rubber ring 41 is connected to the end face of the outer tube 10 by a first bolt 60. Under the pre-tightening action of the first bolt 60, the rubber ring 41 fits tightly with the end face of the outer tube 10, and cooperates with the clamp 50 to constrain and seal between the inner rubber tube 20 and the outer rubber tube 40, thereby ensuring the sealing of the pressure chamber P at the end port of the outer tube 10.

[0019] Here, considering that the rubber ring 41 is pre-tightened by the first bolt 60, the axial pre-tightening force applied to different parts of the rubber ring 41 at the position opposite the bolt head and at the position without the first bolt 60 may differ greatly, thereby affecting the sealing performance of the rubber ring 41 as a whole and the end face of the outer cylinder 10. In this application, a pressure ring 70 is also provided to solve the above problem. As for the specific arrangement of the pressure ring 70, the following two solutions can be adopted:

[0020] First, a compression ring 70 is sleeved on the outer rubber tube 40. The compression ring 70 is pressed against the side of the rubber ring 41 facing away from the end face of the outer tube 10. The first bolt 60 is sequentially inserted through the bolt holes on the compression ring 70 and the rubber ring 41 and connected to the connection hole on the end face of the outer tube 10. In this solution, the compression ring 70 is arranged. When the first bolt 60 is pre-tightened, the pressure of the bolt head on the compression ring 70 causes the compression ring 70 to apply uniform axial pressure to all positions of the rubber ring 41, forcing the rubber ring 41 to fit tightly against the end face of the outer tube 10, thereby ensuring the sealing between the entire rubber ring 41 and the end face of the outer tube 10. See Figure 5 .

[0021] Secondly, a pressure ring 70 is coaxially arranged inside the rubber ring 41, and the first bolt 60 is inserted from the outside of the rubber ring 41 through the bolt holes on the pressure ring 70 and the rubber ring 41 and connected to the connection hole on the end face of the outer tube 10. In this solution, the pressure ring 70 is built into the rubber ring 41 and the ring body of the rubber ring 41 is still left between the pressure ring 70 and the end face of the outer tube 10. When the first bolt 60 is axially pre-tightened, the ring body of the rubber ring 41 left between the pressure ring 70 and the end face of the outer tube 10 is tightly pressed against the end face of the outer tube 10 by the pressure ring 70, thereby ensuring the sealing between the entire rubber ring 41 and the end face of the outer tube 10, see Figure 6 .

[0022] Furthermore, the pressure ring 70 and the rubber ring 41 are vulcanized together, which can not only enhance the connection strength between the pressure ring 70 and the rubber ring 41 , but also reduce the operation steps of subsequent assembly operations, which is conducive to improving assembly efficiency.

[0023] Furthermore, as shown in the accompanying drawings, given the relatively poor restraint of the hose on the connecting tube 30, a second bolt 80 connects the flange connecting plate 31 and the outer tube 10 to ensure stable relative position between the flange connecting plate 31, the connecting tube 30, and the outer tube 10, limiting relative displacement therebetween. The second bolt 80 further secures the flange connecting plate 31 to the outer tube 10, thereby preventing the flange connecting plate 31 or the connecting tube 30 from lacking rigid restraint during use, potentially affecting proper assembly. Using the second bolt 80 to connect the flange connecting plate 31 to the outer tube 10 eliminates the need for the first bolt 60 to connect the connecting tube 30 and the outer tube 10, ensuring that the preload force provided by the first bolt 60 for sealing remains stable.

[0024] In addition, in the present application, the connecting pipe 30 and the flange connection plate 31 are connected by a concentrically arranged annular step seat 32. The diameter of the step seat 32 is larger than the diameter of the connecting pipe 30. The end faces of the inner hose 20 and the outer hose 40 adjacent to the flange connection plate 31 abut against the stepped surface of the step seat 32. The stepped surface of the step seat 32 acts as a limiter to help the ends of the inner hose 20 and the outer hose 40 reach the designated assembly position on the connecting pipe 30, ensuring that the assembly meets the standards.

Claims

1. A straight-through pulse damper, comprising an outer tube (10), an inner rubber tube (20) passing through the inner portion of the outer tube (10) along the inner core direction, a pressure chamber (P) being formed between the outer tube wall of the inner rubber tube (20) and the inner tube wall of the outer tube (10), an inlet valve (11) and an outlet valve (12) communicating with the pressure chamber (P) being connected to the outer tube (10), characterized in that: A flange connection plate (31) is provided at one end of the connecting pipe (30), and the pipe end section of the connecting pipe (30) away from the flange connection plate (31) is inserted into the pipe section of the inner rubber hose (20) extending to the outside of the outer tube (10). The inner rubber hose (20) is sleeved with an outer rubber hose (40), and a restraining clamp (50) is provided on the overlapping section of the outer rubber hose (40) sleeved with the inner rubber hose (20) and the connecting pipe (30). The pipe end face of the outer rubber hose (40) and the tube end face of the outer tube (10) are in contact with each other to form a sealing fit.

2. The straight-through pulse damper according to claim 1, characterized in that: A rubber ring (41) is provided at one end of the outer rubber tube (40) adjacent to the end of the outer tube (10). The rubber ring (41) protrudes outward along the radial direction of the outer rubber tube (40) and is connected to the outer rubber tube (40) to form a connected structure. The annular ring surface of the rubber ring (41) fits with the end surface of the outer tube (10). The rubber ring (41) is connected to the end surface of the outer tube (10) by a first bolt (60).

3. The straight-through pulse damper according to claim 2, characterized in that: A pressure ring (70) is sleeved on the tube body of the outer rubber tube (40). The pressure ring (70) is pressed on the ring surface of the rubber ring (41) on the side facing away from the end surface of the outer tube (10). The first bolt (60) is sequentially inserted through the bolt holes on the pressure ring (70) and the rubber ring (41) and connected to the connecting hole on the end surface of the outer tube (10).

4. The straight-through pulse damper according to claim 2, characterized in that: A pressure ring (70) is coaxially arranged inside the rubber ring (41), and a first bolt (60) is inserted from the outside of the rubber ring (41) through the bolt holes on the pressure ring (70) and the rubber ring (41) and connected to the connection hole on the end surface of the outer cylinder (10).

5. The straight-through pulse damper according to claim 3 or 4, characterized in that: The pressure ring (70) and the rubber ring (41) are vulcanized and connected together.

6. The straight-through pulse damper according to claim 1, characterized in that: The second bolt (80) connects the flange connection plate (31) and the outer cylinder (10) and limits the relative displacement between the two.

7. The straight-through pulse damper according to claim 1, characterized in that: The connecting pipe (30) and the flange connecting plate (31) are connected by a coaxially arranged annular step seat (32). The diameter of the step seat (32) is larger than the diameter of the connecting pipe (30). The end faces of the inner rubber tube (20) and the outer rubber tube (40) adjacent to the flange connecting plate (31) are against the step surface of the step seat (32).

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