Guard device and delivery pump

Abstract

The utility model discloses the technical field of delivery pump guard plate, disclose a guard device, including the flow part and the guard piece, and the flow part is provided with the flow hole, the guard piece includes a plurality of guard blocks, a plurality of guard blocks around the axis of flow hole around the flow part is established, and one of guard block and flow part is provided with at least one first protruding, and another is provided with at least one first recess, and the first protruding is embedded in the first recess. The flow part and the guard piece are used for protecting the fluid inlet of the pump and the pump shell before the impeller. By setting the first protruding and the first recess between the guard block and the flow part, the first joint between the guard block and the flow part extends along the radial direction of the flow hole through the embedding of the protruding and the recess. The first joint is prevented from extending along the circumference of the flow hole, and the first joint is prevented from being eaten by the scouring, thereby reducing the wear at the first joint.

Description

Technical Field

[0001] This utility model relates to the field of conveying pump guard plate technology, specifically to a guard plate device and a conveying pump. Background Technology

[0002] To enhance the wear resistance of the transfer pump, a front guard plate is installed inside the pump casing. The front guard plate is usually made of wear-resistant material.

[0003] Announcement No. CN209041159U discloses a large silicon carbide ceramic guard plate for pumps, including a first ceramic panel, a ceramic mounting shaft, and a metal frame. The first ceramic panel is spliced ​​together from several first sector panels. The ceramic mounting shaft has a flow hole in the middle and a mounting platform on the top outer side of the ceramic mounting shaft. The side wall of the mounting platform is inclined outward. The small end of the first sector panel cooperates with the mounting platform. The ceramic mounting shaft is fixed in the middle position of the metal frame. The bottom surface of the first sector panel cooperates with the top surface of the metal frame.

[0004] The aforementioned first sector-shaped panel has a seam between it and the ceramic mounting shaft. The seam is set along the circumference of the ceramic mounting shaft. In the pump, the slurry and mud mainly move along the tangential direction of the impeller rotation, and their streamlines are basically flowing in the circumferential direction. If the seam is also a circumferential annular gap, then the high-speed flowing fluid and solid particles will continuously and completely scour the entire seam, like repeatedly cutting along the same scratch with a knife. This will quickly scour the seam into an increasingly deep groove, causing the seam to be filled and accelerating the failure of the protective plate. The seam being set along the circumference of the ceramic mounting shaft will aggravate the wear at the seam. Utility Model Content

[0005] The purpose of this utility model is to overcome the above-mentioned technical deficiencies and propose a protective plate device and a delivery pump to solve the technical problem that the circumferential setting of the joints in the protective plate in the prior art aggravates the wear at the joints.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution: In a first aspect, this utility model provides a protective plate device, comprising: The flow passage is provided with a flow hole; and The protective plate includes multiple protective plates, which are arranged around the flow passage component around the axis of the flow passage hole. One of the protective plates and the flow passage component is provided with at least one first protrusion, and the other is provided with at least one first groove. The first protrusion is embedded in the first groove.

[0007] In one embodiment, a plurality of the protective plates are combined to form a plurality of rings, the plurality of rings being coaxially arranged and radially fitted along the flow hole.

[0008] In one embodiment, one of the two radially adjacent guard plates along the flow hole is provided with at least one second protrusion and the other is provided with at least one second groove, the second protrusion engaging with the second groove.

[0009] In one embodiment, a second joint is provided between two adjacent guard plates in the direction surrounding the axis of the flow hole, the second joint being arranged radially along the flow hole.

[0010] In one embodiment, the second joints, which are radially adjacent to the flow passage, are offset circumferentially from the flow passage.

[0011] In one embodiment, the guard plate device further includes a connector configured to connect the flow element, the guard plate, and the pump housing.

[0012] In one embodiment, the protective plate has countersunk holes; The connector also includes a screw, the threaded end of which passes through the countersunk hole and is configured to thread-connect the pump housing.

[0013] In one embodiment, the head of the screw is fitted into the countersunk hole; The connector also includes a sealing block disposed in the countersunk hole.

[0014] In one embodiment, the outer diameter of the sealing block gradually increases along the direction of insertion into the countersunk hole; The connector further includes an adhesive layer, which is embedded in the countersunk hole and connects the inner wall of the countersunk hole, the screw, and the sealing block.

[0015] Secondly, this utility model also provides a delivery pump, including the aforementioned protective plate device.

[0016] Compared with the prior art, the protective plate device and conveying pump provided by this utility model allow fluid to enter the pump casing through the flow hole and be pumped out of the pump casing under the action of the impeller. Some fluid enters between the impeller and the front protective plate. To prevent wear on the pump casing at the front protective plate, a protective plate (i.e., a flow-through component and a protective plate) is installed at the pump casing before the impeller to protect the fluid inlet of the pump and the pump casing before the impeller. A first protrusion and a first groove are provided between the protective plate and the flow-through component. Through the engagement of the protrusion and the groove, the first joint between the protective plate and the flow-through component extends radially along the flow hole, preventing the first joint from extending circumferentially along the flow hole, thus preventing erosion and reducing wear at the first joint. By separating the protective plate and the flow-through component, they are machined separately, avoiding integral machining and reducing machining dimensions. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a protective plate device provided in an embodiment of the present invention; Figure 2 yes Figure 1 A magnified view of a portion of point A in the middle; Figure 3 This is a cross-sectional view of the connecting member in a protective plate device provided in an embodiment of this utility model.

[0018] Explanation of reference numerals in the attached figures: Flow-through component 1; Flow-through hole 1a; First protrusion 1b; First joint 1c; Protective plate 2; protective plate 21; first groove 2a; second protrusion 2b; second groove 2c; second joint 2d; 3. Connector; 31. Screw; 32. Sealing block; 33. Adhesive layer; Pump casing 4; Countersunk hole e. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0020] To address the technical problem that the circumferentially oriented seams in existing protective plates exacerbate wear at the seams, this invention provides a protective plate device and a delivery pump that can reduce wear on the fluid-contact seams.

[0021] It should be noted that the protective plate device described in this utility model is used for, but not limited to, conveying pumps, etc. For ease of explanation, this utility model only uses the application of the protective plate device to a conveying pump as an example for explanation. The principle of the protective plate device applied to other types of equipment is essentially the same as that applied to a conveying pump, and will not be described in detail here.

[0022] Please see Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the protective plate device in one embodiment of the present invention. Figure 2 yes Figure 1The enlarged schematic diagram at point A shows that the guard plate device includes a flow-through component 1 and a guard plate component 2. The flow-through component 1 is provided with a flow-through hole 1a. The guard plate component 2 includes multiple guard plates 21, which are arranged around the axis of the flow-through component 1 around the flow-through hole 1a. One of the guard plates 21 and the flow-through component 1 is provided with at least one first protrusion 1b, and the other is provided with at least one first groove 2a. The first protrusion 1b is embedded in the first groove 2a. The flow-through component 1 can be a cylindrical structure or a funnel-shaped rotating structure, etc.

[0023] Specifically, fluid enters the pump casing through the flow hole 1a and is pumped out of the pump casing under the action of the impeller. Some fluid enters between the impeller and the front guard plate. To avoid wear on the pump casing at the front guard plate, a guard plate is installed at the pump casing in front of the impeller, namely the flow member 1 and the guard plate 2, to protect the fluid inlet of the pump and the pump casing in front of the impeller. By setting a first protrusion 1b and a first groove 2a between the guard plate 21 and the flow member 1, the first joint 1c between the guard plate 21 and the flow member 1 extends radially along the flow hole 1a through the engagement of the protrusion and the groove, preventing the first joint 1c from extending circumferentially along the flow hole 1a, avoiding scouring that causes the first joint 1c to wear out, and reducing wear at the first joint 1c.

[0024] By separating the protective plate 21 and the flow-through component 1, the protective plate 21 and the flow-through component 1 can be processed separately, avoiding overall processing and reducing the processing size.

[0025] It should be understood that the flow-through component 1 may form a first protrusion 1b and the guard plate 21 may form a first groove 2a; or the flow-through component 1 may form a first groove 2a and the guard plate 21 may form a first protrusion 1b; or both the flow-through component 1 and the guard plate 21 may have mutually interlocking first protrusions 1b and first grooves 2a.

[0026] It should be understood that the cross-sectional shape of the outer wall of the first protrusion 1b can be an arc shape, a sine shape, a cosine shape, etc. The outer wall of the first protrusion 1b and the outer wall of the flow-through component 1 are smoothly transitioned, and the shape of the first groove 2a matches the shape of the first protrusion 1b.

[0027] It should be understood that the protective plate 21 along the radial direction of the flow hole 1a can be a single unit or divided into multiple parts, specifically, such as... Figure 1 As shown, in one embodiment, multiple protective plates 21 are combined to form multiple rings, which are coaxially arranged and radially attached to the flow hole 1a.

[0028] By dividing the guard plate into multiple rings along the radial direction of the flow hole 1a, the size of the guard plate 21 can be reduced, making the guard plate 21 easier to process. The pump casing is protected by the multiple guard plates 21 distributed along the circumferential and radial directions of the flow hole 1a.

[0029] By dividing the protective plate 2 into smaller protective plates 21, the protective plates 21 can be made of silicon carbide, silicon nitride combined with silicon carbide ceramic, etc., with smaller size and more regular shape, and can be processed into silicon carbide ceramic material.

[0030] Since the guard plates 21 are distributed radially and circumferentially along the flow hole 1a, gaps will form between adjacent guard plates 21 along the radial direction of the flow hole 1a. To avoid the gaps being entirely along the circumference of the flow hole 1a, therefore, as follows: Figure 2 As shown, in one embodiment, one of two radially adjacent guard plates 21 along the flow hole 1a is provided with at least one second protrusion 2b and the other is provided with at least one second groove, the second protrusion 2b and the second groove 2c being fitted together.

[0031] By providing a second protrusion 2b and a second groove 2c between two radially adjacent guard plates 21 along the flow hole 1a, the direction of the joint between the radially adjacent guard plates 21 along the flow hole 1a can be changed by the engagement of the second groove 2c and the second protrusion 2b, thus preventing the joint from extending circumferentially along the flow hole 1a.

[0032] It should be understood that the flow-through component 1 may form a first protrusion 1b and the guard plate 21 may form a first groove 2a; or the flow-through component 1 may form a first groove 2a and the guard plate 21 may form a first protrusion 1b; or both the flow-through component 1 and the guard plate 21 may have mutually interlocking first protrusions 1b and first grooves 2a.

[0033] It should be understood that the cross-sectional shape of the outer wall of the first protrusion 1b can be an arc shape, a sine shape, a cosine shape, etc. The outer wall of the first protrusion 1b and the outer wall of the flow-through component 1 are smoothly transitioned, and the shape of the first groove 2a matches the shape of the first protrusion 1b.

[0034] In one embodiment, a second joint 2d is provided between two adjacent guard plates 21 in the direction of the axis surrounding the flow hole 1a, the second joint 2d being arranged radially along the flow hole 1a.

[0035] By setting the second joint 2d radially along the flow hole 1a, the fluid can no longer scour along a continuous second joint 2d. Instead, the fluid can only pass through the second joint 2d momentarily, rather than continuously scour. This is equivalent to turning continuous linear cutting into brief point-like impacts, which greatly disperses and reduces the scouring energy and time acting on a unit length of the second joint 2d, thereby significantly slowing down the wear rate.

[0036] like Figure 1 and Figure 2 As shown, in one embodiment, the second joint 2d, which is radially adjacent to the flow hole 1a, is offset circumferentially from the flow hole 1a.

[0037] By staggering the arrangement, even if a small amount of fluid enters through a second joint 2d of the ring, it will be immediately blocked by the protective plate 21 of the adjacent ring. The fluid must accelerate and change direction again to find the next possible path. This process greatly consumes its kinetic energy and avoids the formation of a destructive direct leakage channel.

[0038] In order to achieve the connection and fixation of the guard plate 21 and the flow-through component 1, in one embodiment, the guard plate device further includes a connector 3, which is disposed to connect the guard plate 21, the flow-through component 1 and the pump casing.

[0039] In this embodiment, by setting the connector 3, the flow-through component 1 and the protective plate 21 are fixed to the pump casing, thereby achieving the fixation of the flow-through component 1, the protective plate 21 and the pump casing.

[0040] It should be understood that connector 3 can be an adhesive, or it can be a bolt, screw, or clip, etc. Specifically, such as Figure 3 As shown, in one embodiment, the protective plate 21 has a countersunk hole; the connector 3 also includes a screw 31, the threaded end of which passes through the countersunk hole and is configured to be threadedly connected to the pump housing.

[0041] The threaded end of screw 31 passes through the countersunk hole and is threadedly connected to the pump housing, so that the protective plate 21 is fixed to the pump housing; by setting the countersunk hole e, the head of screw 31 can be embedded in the countersunk hole e, avoiding the head of screw 31 from being exposed.

[0042] It should be understood that the flow passage 1 is also provided with a countersunk hole e, through which the bolt passes through the countersunk hole e and is connected to the pump casing.

[0043] Since screw 31 is generally made of metal, which is not wear-resistant, in order to avoid direct contact and corrosion of screw 31 by fluid, therefore, as follows: Figure 3 As shown, in one embodiment, the head of the screw 31 is embedded in the countersunk hole e; the connector 3 also includes a sealing block 32, which is disposed in the countersunk hole e.

[0044] By setting the sealing block 32 to be embedded in the countersunk hole e and sealing the opening of the countersunk hole e, fluid can be prevented from entering the countersunk hole e and prevented from corroding the screw 31.

[0045] It should be understood that the sealing block 32 can be a cylinder, a prism, etc., specifically, such as Figure 3 As shown, in one embodiment, the outer diameter of the sealing block 32 gradually increases along the direction of insertion into the countersunk hole e; the connector 3 also includes an adhesive layer 33, which is embedded in the countersunk hole e and connects the inner wall of the countersunk hole e, the screw 31, and the sealing block 32. The adhesive layer 33 is formed by curing an adhesive.

[0046] In this embodiment, the outer diameter of the sealing block 32 gradually increases along the direction of insertion into the countersunk hole e, making the sealing block 32 truncated cone-shaped. Through the adhesive layer 33, the sealing block 32 can be bonded to the countersunk hole e. At the same time, the adhesive layer 33 fills the gap between the sealing block 32 and the countersunk hole e. Through the cooperation between the adhesive layer 33 and the inverted conical sealing block 32, an inverted adhesive layer 33 structure is formed, which can stably fix the sealing block 32 in the countersunk hole e.

[0047] like Figure 1 As shown, in a second aspect, the present invention also provides a delivery pump, including the aforementioned protective plate device.

[0048] In one embodiment, the delivery pump also includes a pump housing 4, and the flow passage component and the protective plate are connected to the pump housing 4 by screws 31.

[0049] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A protective plate device, characterized in that, include: The flow passage is provided with a flow hole; and The protective plate includes multiple protective plates, which are arranged around the flow passage component around the axis of the flow passage hole. One of the protective plates and the flow passage component is provided with at least one first protrusion, and the other is provided with at least one first groove. The first protrusion is embedded in the first groove.

2. The protective plate device according to claim 1, characterized in that, Multiple protective plates are combined to form multiple rings, which are coaxially arranged and fit together radially along the flow hole.

3. The protective plate device according to claim 2, characterized in that, One of the two adjacent guard plates along the radial direction of the flow hole is provided with at least one second protrusion and the other is provided with at least one second groove, the second protrusion and the second groove being engaged.

4. The protective plate device according to claim 2, characterized in that, In the direction surrounding the axis of the flow hole, there is a second joint between two adjacent guard plates, the second joint being arranged radially along the flow hole.

5. The protective plate device according to claim 4, characterized in that, The second joints, which are radially adjacent to the flow passage, are offset circumferentially from the flow passage.

6. The protective plate device according to claim 1, characterized in that, It also includes a connector configured to connect the flow-through component, the guard plate, and the pump housing.

7. The protective plate device according to claim 6, characterized in that, The protective plate is provided with countersunk holes; The connector also includes a screw, the threaded end of which passes through the countersunk hole and is configured to thread-connect the pump housing.

8. The protective plate device according to claim 7, characterized in that, The head of the screw is fitted into the countersunk hole; The connector also includes a sealing block disposed in the countersunk hole.

9. The protective plate device according to claim 8, characterized in that, The outer diameter of the sealing block gradually increases along the direction it extends into the countersunk hole; The connector further includes an adhesive layer, which is embedded in the countersunk hole and connects the inner wall of the countersunk hole, the screw, and the sealing block.

10. A delivery pump, characterized in that, Includes the protective plate device as described in any one of claims 1-9.

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