Single-stage single-suction vertical hot water centrifugal pump

Abstract

The utility model discloses a single-stage single-suction vertical hot water centrifugal pump which comprises a connecting pipe, the connecting pipe is of a hollow cylindrical structure, a lining pipe is fixedly connected to the inner wall of the connecting pipe, an inserting groove is formed between the lining pipe and the inner wall of the connecting pipe, the inner wall and the outer wall of the two ends of the lining pipe are of a conical structure, and the connecting pipe is connected with a pipeline in a sleeved mode through the inserting groove. The utility model has the following advantages: the lining pipe is fixed in the connecting pipe, one end of the pipeline is inserted into the slot when connection is needed, so that the effect of sleeve connection can be realized, and the pipeline can be inserted into the slot when the pipeline needs to be connected; hot water in the pipeline is guaranteed to be conveyed out from the lining pipe, in this way, it is avoided that connecting joints exist between pipeline connecting ends, the whole-process sealed conveying effect is achieved, the probability of water leakage is reduced, after the pipeline is inserted, the screw is rotated to drive the clamping block to press the pipeline, the connecting stability is improved, and the pipeline is prevented from falling off.

Description

Technical Field

[0001] This utility model relates to the technical field of pump pipeline connection structure, specifically to a single-stage single-suction vertical hot water centrifugal pump. Background Technology

[0002] Hot water centrifugal pumps are one of the many types of pumps available today. They are divided into vertical and horizontal types and are mainly used for building heating and the transportation, circulation, and pressurization of hot water. They are often used in conjunction with boilers to ensure the hot water required for industrial production.

[0003] Because it is used to transport high-temperature hot water, the pressure inside the pipeline is higher than that of ordinary pumps. Currently, the main connection method of hot water pumps is to connect the pipe ends by flanges without any auxiliary structures, which makes the connection nodes prone to leakage under high pressure. Therefore, a single-stage single-suction vertical centrifugal hot water pump is proposed. Utility Model Content

[0004] The technical solution adopted by this utility model to solve the technical problem is: a single-stage single-suction vertical hot water centrifugal pump, including a connecting pipe, the connecting pipe being a hollow cylindrical structure, an inner liner fixedly connected to the inner wall of the connecting pipe, a slot being provided between the inner liner and the inner wall of the connecting pipe, the inner and outer walls of the inner liner being tapered structures at both ends, a pipe being sleeved on the connecting pipe through the slot, and connecting rings being detachably connected to both ends of the connecting pipe, a hidden groove being provided in the connecting ring, and the connecting ring being an annular structure.

[0005] As a preferred technical solution of this utility model, the inner liner tube is uniformly fixedly connected with anti-backward barbs on one side wall of the slot. The anti-backward barbs are annular structures. The inner middle side wall of the inner liner tube is rotatably connected with a check plate through a torsion spring, and the torsion spring is a one-way rotation structure.

[0006] As a preferred technical solution of this utility model, the outer ring wall of the connecting ring is uniformly provided with threaded holes, and a screw is threadedly connected to the inner thread of the threaded holes. One end of the screw extending into the hidden groove is rotatably connected to a locking block.

[0007] As a preferred technical solution of this utility model, a slot is provided on the outer wall of a section of the pipe located in the hidden groove. The slot corresponds to a locking block. The locking block is inserted into the slot by a screw. One end of the pipe passes through a connecting ring and is inserted into the slot.

[0008] As a preferred technical solution of this utility model, it also includes a flange, which is fixedly connected to the edges of both ends of the connecting pipe. The connecting pipe is connected to the flange on the pipeline through the flange, and a sealing ring is fixedly connected to the outer ring wall of the flange.

[0009] This utility model has the following advantages: the inner liner is fixed inside the connecting pipe. When connection is required, one end of the pipe is inserted into the slot, which achieves the effect of sleeve connection and ensures that the hot water in the pipe is transported out from the inner liner. This avoids the connection nodes between the pipe connection ends, achieves the effect of full-process sealed transport, and reduces the probability of water leakage. After the pipe is inserted, the screw is rotated to drive the clamping block to press the pipe, which improves the stability of the connection and prevents the pipe from falling off.

[0010] Depending on the actual installation requirements, flanges can be fixed at both ends of the connecting pipe, and corresponding flanges can be fixed at the corresponding positions on the pipe. In this way, as the pipe is inserted, the two flanges fit together, ensuring the above-mentioned insertion effect. The flanges are used to fix the connection, and the two installation methods improve the convenience of connecting the connecting pipe and the pipeline. Attached Figure Description

[0011] Figure 1 This is a three-dimensional structural schematic diagram of a preferred embodiment of the present invention;

[0012] Figure 2 This is a half-sectional structural diagram of a preferred embodiment of the present invention;

[0013] Figure 3 This is a preferred embodiment of the present utility model. Figure 2 Enlarged structural diagram at point A in the middle.

[0014] Explanation of reference numerals in the attached drawings: 1. Connecting pipe; 2. Inner liner pipe; 3. Slot; 4. Connecting ring; 5. Hidden groove; 6. Screw hole; 7. Screw; 8. Locking block; 9. Slot; 10. Pipe; 11. Check plate; 12. Anti-backflow barb; 13. Flange. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings.

[0016] Please refer to the following: Figure 1-3 This utility model discloses a single-stage, single-suction vertical hot water centrifugal pump, including a connecting pipe 1, which is a hollow cylindrical structure. An inner liner 2 is fixedly connected to the inner wall of the connecting pipe 1. A slot 9 is provided between the inner liner 2 and the inner wall of the connecting pipe 1. The inner and outer walls of the inner liner 2 are tapered structures. A pipe 10 is sleeved on the connecting pipe 1 through the slot 9. Both ends of the connecting pipe 1 are detachably connected to a connecting ring 4. A hidden groove 5 is opened in the connecting ring 4. The connecting ring 4 is an annular structure.

[0017] The inner liner tube 2 is uniformly fixedly connected to one side wall of the slot 9 with anti-reverse barbs 12. The anti-reverse barbs 12 are annular structures. The inner middle side wall of the inner liner tube 2 is rotatably connected to a check plate 11 through a torsion spring. The torsion spring is a one-way rotating structure. The outer ring wall of the connecting ring 4 is uniformly opened with threaded holes 6. The threaded holes 6 are threaded with screw rods 7. One end of the screw rod 7, which extends into the hidden groove 5, is rotatably connected to a locking block 8. The outer wall of the section of the pipe 10 located in the hidden groove 5 is opened with a locking groove 3. The locking groove 3 corresponds to the locking block 8. The locking block 8 is inserted into the locking groove 3 through the screw rod 7. One end of the pipe 10 passes through the connecting ring 4 and is inserted into the slot 9.

[0018] The technical effects of this solution are as follows: the pipe 10 is inserted into the slot 9, which improves the convenience of pipe 10 connection through the insertion method. Because it is a socket structure, the water in the pipe 10 will be transported out through the inner liner 2. In this way, there is no joint in the middle of the end of the pipe 10, which reduces the probability of water leakage. At the same time, the insertion of the pipe 10 is relatively deep, which can improve the stability of the insertion. After insertion, rotating the screw 7 will drive the locking block 8 to press the pipe 10, which improves the reliability of the connection. The anti-backflow barb 12 fixed on the outer wall of the inner liner 2 can support the pipe 10 and prevent the pipe 10 from coming out of the slot 9.

[0019] It also includes flange 13, which is fixedly connected to the edges of both ends of connecting pipe 1. Connecting pipe 1 is connected to flange 13 on pipe 10 through flange 13. A sealing ring is fixedly connected to the outer ring wall of flange 13.

[0020] The technical effect of this solution is as follows: To improve the flexibility of application, when needed, the connecting ring 4 can be removed and the flange 13 can be fixed on the connecting pipe 1. However, the flange 13 on the pipe 10 is not fixed at its end, but is fixed at the corresponding position on the pipe 10 according to the insertion depth of the pipe 10. In this way, the pipe 10 will still be inserted into the slot 9 to achieve a sealing effect. At the same time, the flange 13 ensures the stability of the connection between the pipe 10 and the connecting pipe 1.

[0021] Specifically, when using this utility model, first insert one end of the pipe 10 into the slot 9, then rotate the screw 7 to drive the clamping block 8 to press the pipe 10. If the pipe 10 is a flexible tube, the pressed part will be pressed into the clamping groove 3, improving the stability of the pipe 10 connection. If the pipe 10 is a rigid pipe, the bottom side wall of the clamping block 8 can be set into a spike structure to pierce and fix the pipe 10. At the same time, the outer wall of the inner liner tube 2 forms a conical structure in the slot 9. As the pipe 10 is inserted, it will be squeezed. With the cooperation of the anti-retraction barb 12, the anti-retraction performance of the pipe 10 is improved. Since the water is being transported into the inner liner tube 2, there is no seam between the pipe 10 and the connecting pipe 1, which naturally improves the anti-leakage effect.

[0022] Because of the flange 13, different connection methods can be selected according to the actual situation, which improves the flexibility and adaptability of equipment application. In order to ensure the installation effect, the specific installation position of the flange 13 fixed on the pipe 10 needs to be adjusted according to its insertion depth. Traditional end fitting is not required. While being fixed by the flange 13, it also has the effect of plug-in sealing and leak prevention.

[0023] The above are merely preferred embodiments of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

[0024] All other parts of this utility model that are not described in detail belong to the prior art, and therefore will not be described in detail here.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A single-stage, single-suction vertical hot water centrifugal pump, comprising a connecting pipe (1), characterized in that, The connecting pipe (1) is a hollow cylindrical structure. The inner wall of the connecting pipe (1) is fixedly connected to the inner liner (2). A slot (9) is provided between the inner liner (2) and the inner wall of the connecting pipe (1). The inner and outer walls of the inner liner (2) are tapered. The connecting pipe (10) is sleeved through the slot (9). Both ends of the connecting pipe (1) are detachably connected to a connecting ring (4). A hidden groove (5) is opened in the connecting ring (4). The connecting ring (4) is a ring structure.

2. A single-stage, single-suction, vertical hot water centrifugal pump as described in claim 1, characterized in that, The inner liner tube (2) is uniformly fixedly connected to one side wall of the slot (9) with anti-reverse barbs (12). The anti-reverse barbs (12) are annular structures. The inner middle side wall of the inner liner tube (2) is rotatably connected to a check plate (11) through a torsion spring, and the torsion spring is a one-way rotation structure.

3. A single-stage, single-suction vertical hot water centrifugal pump as described in claim 1, characterized in that, The outer ring wall of the connecting ring (4) is uniformly provided with threaded holes (6), and a screw rod (7) is threadedly connected inside the threaded hole (6). One end of the screw rod (7) extending into the hidden groove (5) is rotatably connected to a locking block (8).

4. A single-stage, single-suction vertical hot water centrifugal pump as described in claim 1, characterized in that, The outer wall of the pipe (10) located in the hidden groove (5) has a slot (3) and a block (8) corresponding to it. The block (8) is inserted into the slot (3) by a screw (7). One end of the pipe (10) passes through the connecting ring (4) and is inserted into the slot (9).

5. A single-stage, single-suction vertical hot water centrifugal pump as described in claim 1, characterized in that, It also includes a flange (13), which is fixedly connected to the edges of both ends of the connecting pipe (1). The connecting pipe (1) is connected to the flange (13) on the pipe (10) through the flange (13). A sealing ring is fixedly connected to the outer ring wall of the flange (13).

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