Screw pump sealing punch device

Abstract

The utility model discloses a screw pump sealing punch device, and relates to the technical field of sealing. According to the main technical scheme, a through hole is formed in a pressure-bearing ring, the pressure-bearing ring comprises a first connecting piece, a first plate body and a second plate body, the first plate body is attached to one side of the second plate body, the through hole is formed in the side, away from the second plate body, of the first plate body, and the through hole extends in the direction from the first plate body to the second plate body and penetrates through the second plate body; the first connecting piece is arranged on the side, close to the second plate body, of the first plate body, the cross sectional area of the first connecting piece is gradually increased in the direction from the second plate body to the first plate body, a first connecting groove is formed in the side, close to the first plate body, of the second plate body, and the first connecting groove is matched with the first connecting piece. The purposes that the impact force of fluid on the pressure-bearing ring is dispersed, local stress concentration is reduced, the impact resistance is improved, the abrasion and deformation probability of the pressure-bearing ring caused by long-time high-speed fluid scouring is reduced, the good sealing performance is kept, and the leakage risk is reduced are expected to be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing, in particular to a sealing punch device for a screw pump. Background Art

[0002] In industrial production, screw pumps, as a common fluid transmission equipment, are widely used in many fields such as petroleum, chemical industry, and food.

[0003] In the prior art, screw pump sealing devices mostly use sealing rings made of a single material or simple mechanical sealing structures. When subjected to strong impact or long-term high-speed fluid erosion, the sealing parts are prone to wear and deformation, which can lead to seal failure. Utility Model Content

[0004] The purpose of the utility model is to provide a screw pump sealing device, which solves the problem that the sealing parts of the screw pump sealing devices in the prior art are easily worn and deformed when subjected to strong impact or long-term high-speed fluid flushing, thereby causing sealing failure.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A screw pump sealing device includes a pressure ring with a through hole formed on the pressure ring. The pressure ring includes a first connecting piece, a first plate body and a second plate body. The first plate body is attached to one side of the second plate body, and the through hole is formed on the side of the first plate body away from the second plate body. The through hole extends along the first plate body toward the second plate body, and the through hole passes through the second plate body; the first connecting piece is arranged on the side of the first plate body close to the second plate body, and the cross-sectional area of ​​the first connecting piece gradually increases along the direction from the second plate body to the first plate body. A first connecting groove is formed on the side of the second plate body close to the first plate body. The first connecting groove is arranged corresponding to the first connecting piece, and the first connecting groove is adapted to the first connecting piece.

[0007] A further technical solution is: a plurality of first connecting members are provided, and the plurality of first connecting members are evenly distributed around the axis of the through hole.

[0008] A further technical solution is: the first connecting member includes a plurality of first connecting columns, and the plurality of first connecting columns are evenly arranged along the radial direction of the through hole.

[0009] A further technical solution is that the cross section of the first connecting member is circular or regular polygonal.

[0010] A further technical solution is: the pressure ring also includes a second connecting piece; the second connecting piece is arranged on the side of the second plate body close to the second plate body, and the cross-sectional area of ​​the second connecting piece gradually increases along the second plate body toward the second plate body; a second connecting groove is opened on the side of the second plate body close to the second plate body, the second connecting groove is arranged corresponding to the second connecting piece, and the second connecting groove is adapted to the second connecting piece.

[0011] A further technical solution is that the second connecting members are evenly arranged between any two adjacent first connecting members.

[0012] A further technical solution is that two adjacent first connecting members are symmetrically distributed on both sides of the second connecting member.

[0013] A further technical solution is that the second connecting member includes a plurality of second connecting columns, and the plurality of second connecting columns are evenly arranged along the radial direction of the through hole.

[0014] A further technical solution is that the first plate body, the second plate body, the first connecting column and the second connecting column are all made of double fluorosulfurized phenyl silicone rubber.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] The contact area between the first connector and the first connecting groove is increased, thereby increasing the contact surface between the second plate and the second plate. This is expected to help disperse the impact force of the fluid on the pressure ring, reduce local stress concentration, thereby improving impact resistance, and reducing the wear and deformation of the pressure ring caused by long-term high-speed fluid erosion, thereby maintaining good sealing performance and reducing the risk of leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the structure of a screw pump sealing device in this embodiment;

[0018] Figure 2 This is a structural schematic diagram of a first plate body used in a screw pump sealing device in this embodiment;

[0019] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure at AA in the middle;

[0020] Figure 4 This is a structural schematic diagram of a second plate body used in a screw pump sealing device in this embodiment;

[0021] Figure 5 for Figure 4 Schematic diagram of the cross-sectional structure at BB in the middle.

[0022] Markings and corresponding parts names in the accompanying drawings:

[0023] 1-first connecting member; 11-first connecting column;

[0024] 2-first plate; 3-second plate;

[0025] 4-first connecting slot; 41-first slot element;

[0026] 5-second connecting member; 51-second connecting column;

[0027] 6-second connecting slot; 61-second slot element;

[0028] 7-Through hole. DETAILED DESCRIPTION

[0029] The present invention will be further described below in conjunction with the accompanying drawings.

[0030] Example 1

[0031] This embodiment provides a screw pump sealing device, such as Figure 1-Figure 5 As shown, it includes a pressure ring, which is provided with a through hole 7. The pressure ring includes a first connecting member 1, a first plate body 2 and a second plate body 3. The first plate body 2 is attached to one side of the second plate body 3, and the through hole 7 is provided on the side of the first plate body 2 away from the second plate body 3. The through hole 7 extends along the first plate body 2 toward the second plate body 3, and the through hole 7 passes through the second plate body 3; the first connecting member 1 is arranged on the side of the first plate body 2 close to the second plate body 3, and the cross-sectional area of ​​the first connecting member 1 gradually increases along the direction of the second plate body 3 toward the first plate body 2. A first connecting groove 4 is provided on the side of the second plate body 3 close to the first plate body 2, and the first connecting groove 4 is arranged corresponding to the first connecting member 1, and the first connecting groove 4 is adapted to the first connecting member 1.

[0032] Exemplarily, during implementation, the pressure ring includes a first connector 1, a first plate 2, and a second plate 3. The first connector 1 is integrally formed and disposed on one side of the first plate 2, and the cross-sectional area of ​​the first connector 1 gradually increases from the other side of the first plate 2 toward the one side of the first plate 2. A first connecting groove 4 is defined on one side of the second plate 3, and the cross-sectional area of ​​the first connecting groove 4 gradually decreases from the one side of the second plate 3 toward the other side of the second plate 3. The first connecting groove 4 is adapted to mate with the first connector 1.

[0033] A first through hole is opened on one side of the first plate body 2, and a second through hole is opened on one side of the second plate body 3, and the second through hole corresponds to the first through hole in size and position, so that after the first plate body 2 and the second plate body 3 are stacked together, the first through hole can be connected with the second through hole to form a through hole 7.

[0034] When in use, first, stack the first plate 2 and the second plate 3 together, and fit the first connecting piece 1 on one side of the first plate 2 into the first connecting groove 4 on one side of the second plate 3, so that the first plate 2 and the second plate 3 form a pressure ring. Secondly, install the assembled pressure ring at the designated position of the screw pump, and ensure that the hole 7 is aligned with the flow channel of the pump. The cross-sectional area of ​​the first connecting piece 1 gradually decreases from the first plate 2 to the second plate 3. On the one hand, it facilitates the stacking of the first plate 2 and the second plate 3. On the other hand, it increases the contact area between the first connecting piece 1 and the first connecting groove 4, thereby increasing the contact surface between the second plate 3 and the second plate 3. It is expected to help disperse the impact force of the fluid on the pressure ring, reduce local stress concentration, thereby improving impact resistance, and reduce the probability of wear and deformation of the pressure ring caused by long-term high-speed fluid erosion, thereby maintaining good sealing performance and reducing the risk of leakage.

[0035] Example 2

[0036] Based on the above embodiment 1, in this embodiment, Figure 2 As shown, a plurality of first connecting members 1 are provided, and the plurality of first connecting members 1 are evenly distributed around the axis of the through hole 7 .

[0037] For example, during implementation, a plurality of first connecting members 1 are provided, and these first connecting members 1 are evenly distributed around the axis of the through hole 7. Similarly, a plurality of first connecting grooves 4 are provided, and these first connecting grooves 4 are evenly distributed around the axis of the through hole 7. The number and position of the first connecting grooves 4 on the second plate 3 correspond to those of the first connecting members 1 on the first plate 2.

[0038] During use, the first connector 1 on the first plate 2 is inserted into the corresponding first connection groove 4 on the second plate 3. A plurality of first connectors 1 are provided in order to more effectively disperse the impact force of the fluid, thereby reducing the risk of excessive force at a single point and improving the impact resistance of the pressure ring. Furthermore, the plurality of first connectors 1 are evenly distributed around the axis of the through hole 7, making the contact between the first plate 2 and the second plate 3 more uniform around the axis of the through hole 7. This helps evenly disperse the impact force of the fluid around the axis of the through hole 7, thereby improving sealing performance and impact resistance.

[0039] Example 3

[0040] Based on the above embodiment 2, in this embodiment, Figure 2 As shown, the first connecting member 1 includes a plurality of first connecting columns 11 , and the plurality of first connecting columns 11 are evenly arranged along the radial direction of the through hole 7 .

[0041] Exemplarily, during implementation, the first connecting member 1 includes a first connecting column 11, and the cross-sectional area of ​​the first connecting column 11 gradually increases from the other side of the first plate body 2 to the one side of the first plate body 2. There are a plurality of first connecting columns 11, and the plurality of first connecting columns 11 are uniformly distributed along the radial direction of the through hole 7. The first connecting groove 4 includes a first groove element 41, and the cross-sectional area of ​​the first groove element 41 gradually decreases from the one side of the second plate body 3 to the other side of the second plate body 3. There are a plurality of first groove elements 41, and the plurality of first groove elements 41 are uniformly distributed along the radial direction of the through hole 7. The number and position of the first groove elements 41 on the second plate body 3 correspond to the first connecting columns 11 on the first plate body 2.

[0042] During use, the first connecting studs 11 on the first plate 2 are correspondingly inserted into the first slots 41 on the second plate 3. A plurality of first connecting studs 11 are provided in order to effectively disperse the impact force of the fluid, thereby reducing the risk of excessive force at a single point and improving the impact resistance of the pressure ring. Furthermore, the plurality of first connecting studs 11 are evenly distributed radially along the through hole 7, making the contact between the first plate 2 and the second plate 3 more uniform along the radial direction of the through hole 7. This uniformly disperses the fluid impact force radially along the through hole 7, thereby improving sealing performance and impact resistance.

[0043] Example 4

[0044] Based on the above embodiment 3, in this embodiment, Figure 2 As shown, the cross section of the first connecting member 1 is circular or regular polygonal.

[0045] For example, during implementation, the cross-section of the first connector 1 can be circular, in the hope of providing a more uniform contact area and thereby reducing local stress concentration. Furthermore, the cross-section of the first connector 1 can also be a regular polygon (such as a square, a regular hexagon, etc.), in the hope of providing more fixing points while ensuring uniform contact, thereby enhancing connection stability.

[0046] Example 5

[0047] Based on the above embodiment 3, in this embodiment, Figure 2As shown, the pressure ring also includes a second connecting member 5; the second connecting member 5 is arranged on the side of the second plate body 3 close to the second plate body 3, and the cross-sectional area of ​​the second connecting member 5 gradually increases along the second plate body 3 toward the second plate body 3; a second connecting groove 6 is provided on the side of the second plate body 3 close to the second plate body 3, and the second connecting groove 6 is arranged corresponding to the second connecting member 5, and the second connecting groove 6 is adapted to the second connecting member 5.

[0048] For example, during implementation, the pressure ring further includes a second connecting member 5. The second connecting member 5 is integrally formed and disposed on the side of the first plate 2 where the first connecting member 1 is disposed. The structure of the second connecting member 5 is identical to that of the first connecting member 1. A second connecting groove 6 is disposed on the side of the second plate 3 where the first connecting groove 4 is disposed. The structure of the second connecting groove 6 is identical to that of the first connecting groove 4. The second connecting groove 6 is adapted to mate with the second connecting groove 6.

[0049] During use, the multiple first connecting columns 11 on the first plate 2 are correspondingly embedded in the first slots 41 on the second plate 3, and the second connecting members 5 on the second plate 3 are embedded in the second connecting slots 6 on the second plate 3. By adding the second connecting members 5, more contact points and a larger contact area are created between the first plate 2 and the second plate 3, thereby further reducing local stress concentration, thereby improving impact resistance, and reducing the probability of wear and deformation of the pressure ring caused by long-term high-speed fluid erosion, thereby maintaining good sealing performance and reducing the risk of leakage.

[0050] Example 6

[0051] During use, the distance between two adjacent first connecting members 1 gradually increases along the radial direction of the through hole 7, away from the axis of the through hole 7, so that the impact resistance between the first connecting members 1 is relatively weak. Figure 2 As shown, the second connecting members 5 are evenly distributed between any two adjacent first connecting members 1 .

[0052] For example, during implementation, a second connector 5 is positioned between any two adjacent first connectors 1, ensuring that the second connectors 5 are evenly distributed between the first connectors 1. The number and position of the second connector grooves 6 completely correspond to the second connectors 5, ensuring that each second connector 5 accurately fits into its corresponding second connector groove 6. By positioning the second connectors 5 between the first connectors 1, it is expected that the impact force between the first connectors 1 will be effectively dispersed, thereby improving the impact resistance between the first connectors 1. Furthermore, it is expected that the impact force will be more effectively dispersed, thereby improving the impact resistance of the pressure ring.

[0053] Example 7

[0054] Based on the above embodiment 6, in this embodiment, Figure 2 As shown, two adjacent first connecting members 1 are symmetrically distributed on both sides of the second connecting member 5 .

[0055] For example, during implementation, two adjacent first connectors 1 are symmetrically distributed on both sides of the second connector 5 between the two first connectors 1 , in order to more effectively and evenly distribute the impact force between the first connectors 1 and thereby improve the impact resistance of the pressure ring.

[0056] Example 8

[0057] Based on the above embodiment 7, in this embodiment, as Figure 2 As shown, the second connecting member 5 includes a plurality of second connecting columns 51 , and the plurality of second connecting columns 51 are evenly arranged along the radial direction of the through hole 7 .

[0058] Exemplarily, during implementation, the second connecting member 5 includes a second connecting column 51, and the cross-sectional area of ​​the second connecting column 51 gradually increases from the other side of the second plate body 3 to the one side of the second plate body 3. There are a plurality of second connecting columns 51, and the plurality of second connecting columns 51 are evenly distributed along the radial direction of the through hole 7. The second connecting groove 6 includes a second slot element 61, and the cross-sectional area of ​​the second slot element 61 gradually decreases from the one side of the second plate body 3 to the other side of the second plate body 3. There are a plurality of second slot elements 61, and the plurality of second slot elements 61 are evenly distributed along the radial direction of the through hole 7. The number and position of the second slot elements 61 on the second plate body 3 correspond to the second connecting columns 51 on the second plate body 3.

[0059] During use, the second connecting posts 51 on the second plate 3 are correspondingly embedded in the second slots 61 on the second plate 3. A plurality of second connecting posts 51 are provided in order to effectively disperse the impact force between the first connecting members 1, thereby reducing the risk of excessive force at a single point and improving the impact resistance of the pressure ring. Furthermore, the plurality of second connecting posts 51 are evenly distributed along the radial direction of the through hole 7, making the contact between the second plate 3 and the first connecting member 1 more uniform along the radial direction of the through hole 7, thereby evenly distributing the impact force between the first connecting members 1 along the radial direction of the through hole 7 and improving the sealing performance and impact resistance.

[0060] In an optional embodiment, as Figure 2As shown, the first connector 1 includes N first connecting columns 11; the second connector 5 includes N-1 second connecting columns 51; the distance between the first connecting column 11 away from the through hole 7 in the first connector 1 and the through hole 7 is denoted as D; the distance between the second connecting column 51 away from the through hole 7 in the second connector 5 and the through hole 7 is denoted as d, where D = d. Each first connector 1 includes N first connecting columns 11, and each second connector 5 includes N-1 second connecting columns 51. The distance between the first connecting column 11 away from the through hole 7 in the first connector 1 and the through hole 7 is denoted as D, and the distance between the second connecting column 51 away from the through hole 7 in the second connector 5 and the through hole 7 is denoted as d, where D = d. This is intended to ensure uniform force on the edge of the pressure ring, thereby improving the impact resistance of the pressure ring edge.

[0061] In an optional embodiment, as Figure 2 As shown, the distance between two radially adjacent first connecting columns 11 along the through hole 7 is denoted as L; the distance between two radially adjacent second connecting columns 51 along the through hole 7 is denoted as l, where L = l. The distance between two radially adjacent first connecting columns 11 along the through hole 7 is denoted as L. The distance between two radially adjacent second connecting columns 51 along the through hole 7 is denoted as l, where L = l. This is intended to achieve uniform force distribution in the center of the pressure ring, thereby improving the impact resistance of the center of the pressure ring.

[0062] Example 9

[0063] Based on the above embodiment 8, in this embodiment, Figure 2 As shown, the first plate body 2, the second plate body 3, the first connecting column 11, and the second connecting column 51 are all made of double fluorosulfurized phenyl silicone rubber.

[0064] For example, during implementation, fluorophenyl silicone rubber exhibits excellent resistance to high temperatures, corrosion, and chemicals, maintaining excellent performance in harsh operating environments and capable of operating continuously for over 120 hours at 270°C. The first plate 2, second plate 3, first connecting post 11, and second connecting post 51 are all made of fluorophenyl silicone rubber, in an effort to increase the lifespan and reliability of the pressure ring.

[0065] The manufacturing process for the first plate 2, second plate 3, first connecting column 11, and second connecting column 51 is as follows: Soften the fluorophenyl silicone rubber in a constant temperature oven at 550±5°C for 60 minutes. Then, place the softened fluorophenyl silicone rubber in a corresponding mold and apply pressure at 20 tons for at least 3 minutes. This yields the first plate 2, second plate 3, first connecting column 11, and second connecting column 51.

[0066] Although the present invention has been described herein with reference to a number of illustrative embodiments thereof, it will be understood that numerous other modifications and implementations may be devised by those skilled in the art that fall within the scope and spirit of the principles disclosed herein. More specifically, within the scope of the present disclosure, the drawings, and the claims, numerous variations and modifications may be made to the components and / or arrangement of the subject combination arrangement. In addition to variations and modifications to the components and / or arrangement, other uses will also be apparent to those skilled in the art.

Claims

1. A screw pump sealing device, comprising a pressure ring, wherein the pressure ring is provided with a through hole (7), characterized in that: The pressure ring comprises a first connecting member (1), a first plate body (2) and a second plate body (3), the first plate body (2) is attached to one side of the second plate body (3), the through hole (7) is provided on the side of the first plate body (2) away from the second plate body (3), the through hole (7) extends from the first plate body (2) to the second plate body (3), and the through hole (7) passes through the second plate body (3); the first connecting member (1) is provided on the side of the first plate body (2) close to the second plate body (3), the cross-sectional area of ​​the first connecting member (1) gradually increases along the direction from the second plate body (3) to the first plate body (2), and a first connecting groove (4) is provided on the side of the second plate body (3) close to the first plate body (2), the first connecting groove (4) is provided corresponding to the first connecting member (1), and the first connecting groove (4) is adapted to the first connecting member (1).

2. The screw pump sealing device according to claim 1, characterized in that: A plurality of the first connecting members (1) are provided, and the plurality of the first connecting members (1) are evenly distributed around the axis of the through hole (7).

3. The screw pump sealing device according to claim 2, characterized in that: The first connecting member (1) comprises a plurality of first connecting columns (11), and the plurality of first connecting columns (11) are evenly arranged along the radial direction of the through hole (7).

4. The screw pump sealing device according to claim 3, characterized in that: The cross section of the first connecting member (1) is circular or regular polygonal.

5. The screw pump sealing device according to claim 3, characterized in that: The pressure ring further includes a second connecting member (5); The second connecting member (5) is arranged on a side of the second plate body (3) close to the second plate body (3), and the cross-sectional area of ​​the second connecting member (5) gradually increases along the second plate body (3) toward the second plate body (3); a second connecting groove (6) is provided on a side of the second plate body (3) close to the second plate body (3), the second connecting groove (6) is arranged corresponding to the second connecting member (5), and the second connecting groove (6) is adapted to the second connecting member (5).

6. The screw pump sealing device according to claim 5, characterized in that: The second connecting member (5) is evenly distributed between any two adjacent first connecting members (1).

7. The screw pump sealing device according to claim 6, characterized in that: Two adjacent first connecting members (1) are symmetrically distributed on both sides of the second connecting member (5).

8. The screw pump sealing device according to claim 7, characterized in that: The second connecting member (5) comprises a plurality of second connecting columns (51), and the plurality of second connecting columns (51) are evenly arranged along the radial direction of the through hole (7).

9. The screw pump sealing device according to claim 8, characterized in that: The first plate body (2), the second plate body (3), the first connecting column (11), and the second connecting column (51) are all made of bis(fluorinated) phenylsilicone-based rubber.

Images