Constant-pressure water inlet device for cooling mechanical seal of centrifugal pump

Abstract

The utility model discloses a constant-pressure water inlet device for cooling a mechanical seal of a centrifugal pump, and relates to the field of constant-pressure water inlet devices. The centrifugal pump comprises a bottom plate, a centrifugal pump body and a supporting frame are arranged on the two sides of the upper portion of the bottom plate respectively, a buffer tank is arranged above the supporting frame, a water inlet assembly is arranged on one side of the buffer tank, a water conveying pipe is arranged between a water outlet of the buffer tank and a cooling water inlet of the centrifugal pump body, and a cooling water outlet of the centrifugal pump body is connected with the water conveying pipe. And a constant-pressure assembly is arranged on the water conveying pipe. The buffer tank conveys cold water to the cooling water inlet of the centrifugal pump body through the water conveying pipe, in this way, a secondary water supply mode is adopted, the buffer tank is installed at the position 50-60 cm away from the cooling water inlet of the centrifugal pump body, the pressure is constant to be 0.5-0.6 kg through secondary supply, and the cooling water can be supplied to the cooling water inlet of the centrifugal pump body. Constant and stable cooling water pressure supplied to the pump body can be ensured, and the water inlet amount conveyed to the buffer tank by the pump body can be controlled by installing the floating ball valve in the buffer tank.

Description

TECHNICAL FIELD

[0001] The utility model relates to constant pressure water inlet device technical field, specifically, relate to a centrifugal pump mechanical seal cooling's constant pressure water inlet device. BACKGROUND

[0002] The main role of constant pressure water inlet device is to provide stable cooling water source for the mechanical seal of centrifugal pump, prevent the sealing part from being damaged due to overheating, thereby guaranteeing the normal operation of the pump and prolonging the service life of the seal, when the existing sanitary centrifugal pump operates, external cooling water needs to be used to cool the internal mechanical seal, to prevent the graphite mechanical seal from causing internal leakage risk due to high temperature caused by wear. The cooling water supply pressure process requires control in the range of 0.5-0.8kg, and during use, too high or too low pressure has a great influence on the service life of the mechanical seal, and secondly, the main pipe water supply pressure cannot be constant, which causes the mechanical seal to be frequently damaged due to cooling effect.

[0003] Therefore, we improve it and propose a centrifugal pump mechanical seal cooling constant pressure water inlet device. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at: in view of the fact that too high or too low pressure has a great influence on the service life of the mechanical seal during use, and secondly, the main pipe water supply pressure cannot be constant, which causes the mechanical seal to be frequently damaged due to cooling effect.

[0005] In order to realize the above-mentioned purpose of the application, the utility model provides the following technical scheme:

[0006] A centrifugal pump mechanical seal cooling constant pressure water inlet device is provided to improve the above-mentioned problems.

[0007] The application is as follows:

[0008] Including the bottom plate, the both sides of the bottom plate top are equipped with centrifugal pump body and support frame respectively, the top of support frame is equipped with buffer tank, the side of buffer tank is provided with water inlet assembly, the water outlet of buffer tank and the water inlet of centrifugal pump body cooling water are installed with water delivery pipe, and the water delivery pipe is provided with constant pressure assembly.

[0009] The buffer tank is provided with buffer tank, which transports cold water to the water inlet of centrifugal pump body cooling water through water delivery pipe, so that the secondary water supply mode is adopted, the buffer tank is installed at a height of 50-60cm from the water inlet of centrifugal pump body cooling water, the pressure is constant at 0.5-0.6kg through secondary supply, which can ensure that the cooling water pressure of pump body is constant and stable, and the float ball valve is installed in the buffer tank, which can control the water inlet amount of pump body to the buffer tank.

[0010] As a preferred implementation form of the constant pressure water inlet device for mechanical seal cooling of the centrifugal pump provided by the utility model, the water inlet assembly comprises a pump body arranged outside the side of the buffer tank, a water inlet pipe is arranged at the water inlet of the pump body, and a water outlet pipe is arranged at the water outlet of the pump body.

[0011] As a preferred implementation form of the constant pressure water inlet device for mechanical seal cooling of the centrifugal pump provided by the utility model, one end of the water outlet pipe penetrating through the side of the buffer tank is provided with a float ball valve inside the buffer tank, and a drain port communicating with the water delivery pipe is arranged at the bottom of the buffer tank.

[0012] As a preferred implementation form of the constant pressure water inlet device for mechanical seal cooling of the centrifugal pump provided by the utility model, the constant pressure assembly comprises a constant pressure box body arranged on the water delivery pipe, and connecting heads connected with the water delivery pipe are arranged at both ends of the constant pressure box body.

[0013] As a preferred implementation form of the constant pressure water inlet device for mechanical seal cooling of the centrifugal pump provided by the utility model, a constant pressure hose is arranged between one end of the two connecting heads in the constant pressure box body, and fixing clamps are arranged on the surfaces of the two sides of the constant pressure hose.

[0014] As a preferred implementation form of the constant pressure water inlet device for mechanical seal cooling of the centrifugal pump provided by the utility model, four constant pressure plates are arranged in the constant pressure box body, two sliding grooves are arranged at the bottom of the inner wall of the constant pressure box body, two of the four constant pressure plates are slidingly matched in the two sliding grooves, and gears are rotationally matched in the middle portions of the two sliding grooves.

[0015] As a preferred implementation form of the constant pressure water inlet device for mechanical seal cooling of the centrifugal pump provided by the utility model, gears are arranged between and meshed with the two tooth plates, one side of one of the constant pressure plates is rotationally matched with a threaded rod, a threaded hole is arranged at one side of the constant pressure box body, and the threaded rod is threadedly matched in the threaded hole.

[0016] As a preferred implementation form of the constant pressure water inlet device for mechanical seal cooling of the centrifugal pump provided by the utility model, a fixing column is arranged at the bottom of the inner wall of the constant pressure box body, a connecting frame is rotationally matched with the circumferential side of the fixing column, recesses are arranged at the two sides of the connecting frame, a connecting groove is arranged at the lower side of each of the two horizontal constant pressure plates, a connecting column is arranged between the inner walls of the two sides of the connecting groove, and the connecting column is slidingly and rotationally matched in the recess.

[0017] Compared with the prior art, the centrifugal pump mechanical seal cooling constant pressure water inlet device has the beneficial effects that: the buffer tank is arranged to deliver cold water to the water inlet of the centrifugal pump body through the water delivery pipe, the secondary water supply mode is adopted, the buffer tank is installed at a height of 50-60cm from the water inlet of the centrifugal pump body, the pressure is constant at 0.5-0.6kg through the secondary supply, the water pressure for supplying the pump body is constant and stable, and the water inlet amount delivered by the pump body to the buffer tank can be controlled through the floating ball valve arranged in the buffer tank. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The centrifugal pump mechanical seal cooling constant pressure water inlet device provided in the application is a whole structure schematic view;

[0019] Figure 2 The centrifugal pump mechanical seal cooling constant pressure water inlet device provided in the application is a whole structure schematic view;

[0020] Figure 3 The centrifugal pump mechanical seal cooling constant pressure water inlet device provided in the application is a whole structure schematic view;

[0021] Figure 4 The centrifugal pump mechanical seal cooling constant pressure water inlet device provided in the application is a whole structure schematic view;

[0022] Figure 5 The centrifugal pump mechanical seal cooling constant pressure water inlet device provided in the application is a whole structure schematic view;

[0023] Indications in the drawing:

[0024] 1, bottom plate; 2, centrifugal pump body; 3, support frame; 4, buffer tank; 5, water inlet assembly; 501, pump body; 502, water inlet pipe; 503, water outlet pipe; 504, floating ball valve; 505, drain; 6, water delivery pipe; 7, constant pressure assembly; 701, constant pressure box; 702, connecting head; 703, constant pressure hose; 704, fixed clamp; 705, constant pressure plate; 706, threaded rod; 707, sliding groove; 708, gear; 709, fixed column; 710, threaded hole; 711, toothed plate; 712, connecting frame; 713, connecting groove; 714, connecting column; 715, groove. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the application more clear, the technical scheme in the embodiments of the application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are part of the embodiments of the application, rather than all the embodiments.

[0026] Therefore, the following detailed description of the embodiments of the present application is not intended to limit the scope of the claimed application, but merely to represent some embodiments of the application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0027] It should be noted that the embodiments and features and technical solutions in the embodiments of the present application can be combined with each other without conflict.

[0028] It should be noted that: similar labels and letters in the following drawings represent similar items, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0029] In the description of the present application, it should be noted that the terms "upper", "lower" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the product is used, or the orientation or positional relationship commonly understood by those skilled in the art. Such terms are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" and the like are only used for differentiation and cannot be understood as indicating or implying relative importance.

[0030] In order for those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings.

[0031] It should be noted that the embodiments and features and technical solutions in the embodiments of the present application can be combined with each other without conflict.

[0032] It should be noted that: similar labels and letters in the following drawings represent similar items, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0033] Embodiment 1

[0034] Please refer to Figures 1-5The utility model provides a kind of centrifugal pump mechanical seal cooling constant pressure water inlet device, comprising: bottom plate 1, centrifugal pump body 2 and support frame 3 are respectively equipped with on the two sides of bottom plate 1, support frame 3 is equipped with buffer tank 4 above, water inlet assembly 5 is provided on the side of buffer tank 4, water outlet of buffer tank 4 and the water inlet of centrifugal pump body 2 cooling water are equipped with water pipe 6 between, water pipe 6 is provided with constant pressure assembly 7.Water inlet assembly 5 includes pump body 501 equipped with on the side of buffer tank 4 outside, the water inlet of pump body 501 is equipped with water inlet pipe 502, the water outlet of pump body 501 is equipped with water outlet pipe 503.Water outlet pipe 503 penetrates the side of buffer tank 4 and is installed with float ball valve 504 at its inside one end, the bottom of buffer tank 4 is provided with drain 505 being connected with water pipe 6.

[0035] Implementation process: the water inlet of centrifugal pump body 2 cooling water is transported cold water by buffer tank 4 through water pipe 6, so that two secondary water supply modes are used, buffer tank 4 is installed at the height of 50-60cm from the water inlet of centrifugal pump body 2 cooling water, the pressure is constant at 0.5-0.6kg by secondary supply, can ensure that the constant pressure of pump body cooling water pressure is stable, by installing float ball valve 504 in buffer tank 4, the water inlet amount of pump body 501 to buffer tank 4 can be controlled.

[0036] Implementation benefit: can ensure that the constant pressure of pump body cooling water pressure is stable.

[0037] Example 2

[0038] Constant pressure assembly 7 includes constant pressure box body 701 installed on water pipe 6, and the both ends of constant pressure box body 701 are equipped with connecting head 702 connected with water pipe 6.Two connecting heads 702 are installed with constant pressure hose 703 between one end in constant pressure box body 701, and the surface of constant pressure hose 703 is provided with fixed clamp 704 on both sides.Constant pressure box body 701 is provided with four constant pressure plates 705, two sliding grooves 707 are opened in the inner wall bottom of constant pressure box body 701, and the two sliding grooves 707 are slidably fitted with two constant pressure plates 705, and gear 708 is rotatably fitted in the middle of two sliding grooves 707.The bottom of constant pressure plate 705 is equipped with toothed plate 711, gear 708 is located between two toothed plates 711 and is engaged with them, one side of one of constant pressure plate 705 is rotatably fitted with threaded rod 706, and one side of constant pressure box body 701 is provided with threaded hole 710, and threaded rod 706 is threadedly fitted in threaded hole 710.Constant pressure box body 701 is equipped with fixed column 709 on the inner wall bottom, connecting frame 712 is rotatably fitted on the circumferential side of fixed column 709, recess 715 is opened on both sides of connecting frame 712, connecting groove 713 is opened on the lower side of transverse two constant pressure plates 705, and connecting column 714 is equipped between the inner wall of both sides of connecting groove 713 and is slidably and rotatably fitted in recess 715.

[0039] The implementation process: by setting the constant pressure box 701 on the water pipe 6, the water flow in the water pipe 6 flows through the constant pressure hose 703 through the two connecting heads 702, when the water flow pressure is constant, the two constant pressure plates 705 are in the same position under the constant pressure hose 703 itself shaping deformation, ensure the water flow smoothly in the constant pressure hose 703, when the water flow changes, through the rotation of the screw rod 706 to drive one of the constant pressure plates 705 to move, the two constant pressure plates 705 are adjusted in relative position through the gear 708 and the gear plate 711, and the two constant pressure plates 705 are adjusted in height through the connecting frame 712 rotating on the fixed column 709, so that the water pressure in the constant pressure hose 703 changes.

[0040] The implementation benefit: reduce the water pressure fluctuation caused by the change of water flow in the water pipe 6, ensure the constant pressure stability of the cooling water pressure of the supply pump body.

[0041] The above examples are only used to illustrate the utility model and not to limit the technical solutions described in the utility model, although the utility model has been described in detail in the above description, the utility model is not limited to the above specific implementation, therefore any modification or equivalent replacement of the utility model, and all the technical solutions and improvements without departing from the spirit and scope of the invention, which are all covered in the scope of the claims of the utility model.

Claims

1. A centrifugal pump mechanical seal cooling constant pressure water inlet device, characterized in that, The utility model relates to a centrifugal pump cooling system, including: The bottom plate (1) is equipped with centrifugal pump body (2) and support frame (3) respectively on both sides above the bottom plate (1), the upper side of support frame (3) is equipped with buffer tank (4), one side of buffer tank (4) is provided with water inlet assembly (5), and the water outlet of buffer tank (4) is installed with water delivery pipe (6) between the water inlet of centrifugal pump body (2) cooling water, and constant pressure assembly (7) is set up on water delivery pipe (6).

2. A centrifugal pump mechanical seal cooling constant pressure water inlet device according to claim 1, characterized in that, The water inlet assembly (5) includes a pump body (501) mounted on the side of the buffer tank (4) outside, the water inlet of the pump body (501) is equipped with a water inlet pipe (502), and the water outlet of the pump body (501) is equipped with a water outlet pipe (503).

3. A centrifugal pump mechanical seal cooling constant pressure water inlet device according to claim 2, characterized in that, The water outlet pipe (503) penetrates the side of the buffer tank (4) and is installed with a float valve (504) at the end inside it, and a drain (505) is formed in the bottom of the buffer tank (4) and is connected with the water delivery pipe (6).

4. A centrifugal pump mechanical seal cooling constant pressure water inlet device according to claim 1, characterized in that, The constant pressure assembly (7) includes a constant pressure box body (701) mounted on the water delivery pipe (6), and the two ends of the constant pressure box body (701) are equipped with connecting heads (702) connected with the water delivery pipe (6).

5. A centrifugal pump mechanical seal cooling constant pressure water inlet device according to claim 4, characterized in that, Two connecting heads (702) are installed with a constant pressure hose (703) between the ends inside the constant pressure box body (701), and the surfaces on both sides of the constant pressure hose (703) are provided with fixing clamps (704).

6. A centrifugal pump mechanical seal cooling constant pressure water inlet device according to claim 5, characterized in that, Four constant pressure plates (705) are arranged in the constant pressure box body (701), two sliding grooves (707) are formed in the inner wall of the constant pressure box body (701), four constant pressure plates (705) are slidingly fitted in two sliding grooves (707) in pairs, and gears (708) are rotatably fitted in the middle of two sliding grooves (707).

7. A centrifugal pump mechanical seal cooling constant pressure water inlet device according to claim 6, characterized in that, The bottom of the constant pressure plate (705) is equipped with a toothed plate (711), the gear (708) is located between and engaged with the two toothed plates (711), one side of one of the constant pressure plates (705) is rotatably fitted with a threaded rod (706), one side of the constant pressure box body (701) is provided with a threaded hole (710), and the threaded rod (706) is threadedly fitted in the threaded hole (710).

8. A centrifugal pump mechanical seal cooling constant pressure water inlet device according to claim 7, characterized in that, The inner wall bottom of the constant pressure box body (701) is equipped with a fixed column (709), the circumferential side of the fixed column (709) is rotatably fitted with a connecting frame (712), recesses (715) are formed on both sides of the connecting frame (712), connecting grooves (713) are formed on the lower sides of two constant pressure plates (705) transversely, connecting columns (714) are arranged between the inner walls on both sides of the connecting grooves (713), and the connecting columns (714) are slidingly and rotatably fitted in the recesses (715).

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