CN212717107U

CN212717107U - Urea pump membrane with improved structure

Info

Publication number: CN212717107U
Application number: CN202021370592.3U
Authority: CN
Inventors: 赵玲方
Original assignee: Zhejiang Faguang Rubber Seal Parts Co ltd
Current assignee: Zhejiang Faguang Rubber Seal Parts Co ltd
Priority date: 2020-07-13
Filing date: 2020-07-13
Publication date: 2021-03-16
Anticipated expiration: 2030-07-13

Abstract

The utility model provides a urea pump membrane of improvement structure belongs to mechanical technical field. It has solved the current not good problem of pump membrane side compressive property. This urea pump membrane of improvement structure includes bolt and the rubber membrane of cladding outside the bolt head, be equipped with in the rubber membrane middle part and coaxial and be the fibrous layer of disk form with the rubber membrane, the lateral wall of rubber membrane comprises two conical surfaces one that set up along fibrous layer centrosymmetric, homogeneous shaping has the support ring on the both sides wall border of fibrous layer, and support ring and fibrous layer coaxial setting, the lateral wall of support ring is conical surface two, two conical surfaces two pass the fibrous layer periphery and connect, and two conical surfaces two are parallel with two conical surfaces one respectively. The urea pump membrane side compressive property of this improvement structure is good.

Description

Urea pump membrane with improved structure

Technical Field

The utility model belongs to the technical field of machinery, a urea pump membrane, especially a urea pump membrane of improvement structure is related to.

Background

The Selective Catalytic Reduction (SCR) technology plays a remarkable role in improving environmental pollution caused by exhaust emission, a urea pump is a core component of an SCR system, the performance of the urea pump is closely related to the emission function of an engine, the urea pump is an important component of a urea solution injection metering system and mainly has the functions of extracting urea solution in a urea box, keeping a certain pressure and then conveying the urea solution to an injection unit, the injection unit injects the urea solution to rapidly react with NOX in the exhaust emitted by a diesel engine to generate nitrogen and water, the nitrogen and water is discharged into the atmosphere, and the N2 which is harmless to human bodies is discharged, and a urea pump membrane plays a role in sealing and preventing leakage in the urea pump.

The existing pump membrane is characterized in that the fixing bolt is fixedly connected with a bolt head through a stud, a matching step is arranged on the lower portion of the bolt head, a groove is formed between the matching step and the top of the bolt head, a downward extending welt is arranged on the lower end face of the rubber membrane, the middle of the welt is embedded into the groove, the tail end of the welt is attached to the matching step, protruding lips at the upper side and the lower side are arranged on the outer edge of the end face of the rubber membrane, the inner side of the lip at the upper side of the end face is downwards recessed, a plurality of semicircular shock absorption rings protruding upwards are distributed in the recessed portions, and a reinforcing fiber layer playing a supporting role is laid inside the rubber membrane.

The urea pump membrane is provided with the fiber layer inside to enhance the axial pressure resistance, but in actual use, the side edge of the rubber membrane can bear larger pressure, so that the side edge has the risk of compression transition leakage.

SUMMERY OF THE UTILITY MODEL

The utility model aims at having the above-mentioned problem to current technique, provided a urea pump membrane of improvement structure, the technical problem of solution is how to strengthen side compressive property.

The purpose of the utility model can be realized by the following technical proposal: urea pump membrane of improvement structure, including bolt and the cladding rubber membrane outside the bolt head, be equipped with in the rubber membrane middle part and coaxial and be the fibrous layer of disk form with the rubber membrane, the lateral wall of rubber membrane comprises two conical surfaces one that set up along fibrous layer centrosymmetric, its characterized in that, the both sides wall border of fibrous layer on homogeneous body shaping have the support ring, and support ring and fibrous layer coaxial setting, the lateral wall of support ring is conical surface two, two conical surfaces two pass through the fibrous layer periphery and connect, and two conical surfaces two are parallel with two conical surfaces one respectively.

The fiber layer is integrally provided with two supporting rings, and two conical surfaces II on the outer sides of the two supporting rings are respectively parallel to the two conical surfaces I, so that the side edge of the rubber film is effectively supported, the strength of the side edge of the rubber film is enhanced to avoid transition compression, and the sealing effect is improved.

In the urea pump membrane with the improved structure, the inner side walls of the two support rings are inner circumferential surfaces, and the inner side walls of the support rings are perpendicular to the fiber layer, so that the strength of the support rings is enhanced, and the support effect on the side edge of the rubber membrane is improved.

In the urea pump membrane with the improved structure, the reinforcing ring is uniformly formed between the two support rings and the fiber layer, the reinforcing ring and the fiber layer are coaxially arranged, and the axial section of the reinforcing ring is in a right-angled triangle shape so as to further enhance the strength of the support rings.

In the urea pump membrane with the improved structure, the support rings are provided with the connecting holes which are arranged in a penetrating mode, the axes of the connecting holes are perpendicular to the axis of the fiber layer, each support ring is provided with a circle of connecting holes, and part of the rubber membrane is formed in the connecting holes. Design the connecting hole on the support ring, and partial rubber membrane shaping plays limiting displacement like this in the connecting hole to strengthen rubber membrane and fibrous layer connection stability, make the support ring possess intensity and elasticity simultaneously again, with the compressive property who strengthens the support ring, thereby better support rubber membrane side.

In the urea pump membrane with the improved structure, the inclination angle of one conical surface I is 45-70 degrees. Namely, the inclination angle of one conical surface II is also 45-70 degrees.

In the urea pump membrane with the improved structure, the inclination angle of one conical surface I is 60 degrees. Namely, the inclination angle of one conical surface II is 60 degrees.

Compared with the prior art, the urea pump membrane with the improved structure has the following advantages:

1. the fiber layer is integrally provided with two supporting rings, and two conical surfaces II on the outer sides of the two supporting rings are respectively parallel to the two conical surfaces I, so that the side edge of the rubber film is effectively supported, the strength of the side edge of the rubber film is enhanced to avoid transition compression, and the sealing effect is improved.

2. Design the connecting hole on the support ring, and partial rubber membrane shaping plays limiting displacement like this in the connecting hole to strengthen rubber membrane and fibrous layer connection stability, make the support ring possess intensity and elasticity simultaneously again, with the compressive property who strengthens the support ring, thereby better support rubber membrane side.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is an enlarged schematic view of a structure at a in fig. 1.

Fig. 3 is a schematic perspective view of a fiber layer.

In the figure, 1, bolt; 2. a rubber film; 2a, a first conical surface; 3. a fibrous layer; 3a, a support ring; 3a1 and a second conical surface; 3a2, connecting hole; 3b, a reinforcing ring.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in figure 1, the urea pump membrane with the improved structure comprises a bolt 1 and a rubber membrane 2 covering the head of the bolt 1. Wherein, the lateral wall of rubber membrane 2 comprises two conical surfaces 2a along the 3 centrosymmetric settings of fibrous layer, is equipped with fibrous layer 3 that is the disk form in this rubber membrane 2 middle part, and fibrous layer 3, rubber membrane 2 and the coaxial setting of 1 three of bolt.

Specifically, as shown in fig. 1 and 2, support rings 3a are integrally formed on both side wall edges of the fiber layer 3 along the axial direction, and the support rings 3a are disposed coaxially with the fiber layer 3. Wherein, the inner side wall of the support ring 3a is an inner circumferential surface, and the inner side wall of the support ring 3a is arranged vertically to the fiber layer 3; the outer side wall of the support ring 3a is a second tapered surface 3a1, and the two tapered surfaces 3a1 are arranged symmetrically along the center of the fiber layer 3. The two conical surfaces two 3a1 are connected through the outer circumference surface of the fiber layer 3, and the two conical surfaces two 3a1 are respectively opposite to and parallel to the two conical surfaces one 2 a. The fiber layer 3 is integrally provided with two support rings 3a, and two conical surfaces 3a1 on the outer sides of the two support rings 3a are respectively parallel to the two conical surfaces one 2a, so that the side edge of the rubber membrane 2 is effectively supported, the strength of the side edge of the rubber membrane 2 is enhanced to avoid transitional compression, and the sealing effect is improved. In this embodiment, the inclination angle of one of the tapered surfaces one 2a is 45 to 70 degrees, that is, the inclination angle of the other tapered surface one 2a is 180 degrees — the angle of the tapered surface one 2a, in this case, the inclination angle of one of the tapered surfaces two 3a1 is also 45 to 70 degrees, and the inclination angle of the other tapered surface two 3a1 is 180 degrees — the angle of the tapered surface two 3a 1. Preferably, the inclination angle of one of the first tapered surfaces 2a is 60 degrees, and the angle of the other tapered surface 2a is 120 degrees. The inclination angle of one conical surface 3a1 is 60 degrees, and the inclination angle of the other conical surface 3a1 is 120 degrees.

Further, as shown in fig. 2 and fig. 3, a reinforcing ring 3b is integrally formed between the two support rings 3a and the fiber layer 3, the reinforcing ring 3b and the fiber layer 3 are coaxially disposed, and the axial cross section of the reinforcing ring 3b is a right triangle, so as to further enhance the strength of the support ring 3 a. The support ring 3a is provided with a connecting hole 3a2 penetrating through the support ring, and the axis of the connecting hole 3a2 is vertical to the axis of the fiber layer 3. Each support ring 3a is provided with a ring of the above-mentioned coupling holes 3a2, and a part of the rubber membrane 2 is molded in the coupling hole 3a 2. Design connecting hole 3a2 on support ring 3a, and partial rubber membrane 2 shaping is in connecting hole 3a2, plays limiting displacement like this to strengthen rubber membrane 2 and fibrous layer 3 connection stability, make support ring 3a possess intensity and elasticity simultaneously again, with the compressive property of strengthening support ring 3a, thereby better support rubber membrane 2 side. In the present embodiment, each support ring 3a is preferably provided with 8 connecting holes 3a 2.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. Urea pump membrane of improvement structure, including bolt (1) and cladding rubber membrane (2) outside bolt (1) head, be equipped with in rubber membrane (2) middle part and coaxial and be disk-like fibrous layer (3) with rubber membrane (2), the lateral wall of rubber membrane (2) comprises two conical surfaces (2a) that set up along fibrous layer (3) centrosymmetric, its characterized in that, the both sides wall border of fibrous layer (3) on the homogeneous body shaping have support ring (3a), and support ring (3a) and fibrous layer (3) coaxial arrangement, the lateral wall of support ring (3a) is conical surface two (3a1), two conical surfaces two (3a1) are connected through fibrous layer (3) outer periphery, and two conical surfaces two (3a1) are parallel with two (2a) respectively.

2. The improved structure of the pump membrane of urea pump as claimed in claim 1, wherein the inner side walls of the two support rings (3a) are inner circumferential surfaces, and the inner side walls of the support rings (3a) are perpendicular to the fiber layer (3).

3. The improved structure of the pump membrane of urea pump as claimed in claim 2, wherein a reinforcing ring (3b) is integrally formed between the two support rings (3a) and the fiber layer (3), the reinforcing ring (3b) and the fiber layer (3) are coaxially arranged, and the axial cross section of the reinforcing ring (3b) is a right triangle.

4. The improved structure of the urea pump membrane as claimed in claim 1, 2 or 3, wherein the supporting rings (3a) have connecting holes (3a2) formed therethrough, the axes of the connecting holes (3a2) are perpendicular to the axes of the fiber layers (3), each supporting ring (3a) has a ring of the connecting holes (3a2), and a portion of the rubber membrane (2) is formed in the connecting holes (3a 2).

5. The urea pump membrane of claim 1, 2 or 3, wherein the inclination angle of one of the first conical surfaces (2a) is 45-70 degrees.

6. The improved urea pump membrane as claimed in claim 5, wherein the inclination angle of one of said first tapered surfaces (2a) is 60 degrees.