Balanced sealing system for photo-thermal fused salt cold pump

Abstract

The invention relates to a balance sealing system for a photo-thermal molten salt cold pump. The balance sealing system comprises a water outlet seat, a shaft, a supporting pipe, a wear-resisting ring, a balance sleeve a, a clamping ring, a drainage pipe a, a drainage pipe b, a throttling orifice plate, a balance sleeve b, a packing body, a packing gland, packing, a packing ring, a balance sleeve c, an air blowing pipe and the like. The balance sealing system for the photo-thermal fused salt cold pump comprises six layers of sealing systems. The balance sleeve is fixed on the shaft which drives the balance sleeve to rotate. The wear-resistant ring is fixed on the supporting pipe, the drainage pipe is welded on the supporting pipe, and the supporting pipe is fixed on the water outlet seat. And the throttling orifice plate is welded in the supporting pipe. And the filler body and the supporting pipe are welded on the water outlet seat cylinder body to form a channel. And the air blowing pipe is welded on the packing body, is communicated with the interior through the packing ring and is communicated with an external air source. The invention has the advantages of compact and simple structure, low cost, no leakage, safety and reliability.

Description

Technical Field

[0001] The invention relates to a balanced sealing system, and in particular to a balanced sealing system for a photothermal molten salt cold pump which has a simple and compact structure, low cost, no leakage, safety and reliability. Background Art

[0002] With the urgent global demand for clean and renewable energy, solar thermal power generation technology, as an important part of it, is receiving more and more attention and attention. Solar thermal power stations are usually equipped with molten salt energy storage systems to improve energy utilization and system stability. Molten salt pumps play a vital role in molten salt energy storage systems and are one of the key equipment in solar thermal power generation systems.

[0003] The structure of the solar thermal molten salt pump is usually a long-axis pump, which usually generates a large axial force during operation, and the medium will climb the shaft, posing a risk of leakage. The characteristics of the solar thermal molten salt cooling pump are large flow and high head. During operation, it will generate a greater axial force and a greater risk of medium leakage. Summary of the invention

[0004] In view of the above problems, the main purpose of the present invention is to provide a balanced sealing system for a photothermal molten salt cold pump which has a simple and compact structure, low cost, no leakage, safety and reliability.

[0005] The present invention solves the above-mentioned technical problems through the following technical scheme: a balanced sealing system for a photothermal molten salt cooling pump, the balanced sealing system for the photothermal molten salt cooling pump comprising: a water outlet seat, a shaft, a support pipe, a wear-resistant ring, a balancing sleeve a, a retaining ring, a discharge pipe a, a discharge pipe b, a throttling orifice plate, a balancing sleeve b, a packing body, a packing gland, a packing, a packing ring, a balancing sleeve c, a stud, a nut, a key, and an air blow pipe.

[0006] The balancing sleeve a, balancing sleeve b and balancing sleeve c are all fixed on the shaft by means of retaining rings and keys, and the shaft drives the balancing sleeve a5, balancing sleeve b and balancing sleeve c to rotate.

[0007] The wear-resistant ring is fixed on the supporting pipe, the discharge pipe a and the discharge pipe b are fixed on the supporting pipe, and the supporting pipe is fixed on the water outlet seat.

[0008] The throttling orifice plate is welded inside the supporting tube; the filler body and the supporting tube are welded on the cylinder of the water outlet seat to form a channel.

[0009] The packing gland is connected to the packing body through fasteners, the packing and packing ring are installed inside the packing body, and the packing gland is used to compress the packing.

[0010] The air blowing pipe is welded on the packing body, communicated with the interior through the packing ring, and is communicated with an external air source.

[0011] The balanced sealing system for the photothermal molten salt cold pump includes a six-layer sealing system.

[0012] In a specific implementation example of the present invention, the wear-resistant ring is fixed to the support pipe by means of saddle screws, the drain pipe a and the drain pipe b are fixed to the support pipe by welding, and the support pipe is fixed to the water outlet seat by means of a rib plate.

[0013] In a specific implementation example of the present invention, the first layer in the six-layer sealing system is: the balancing sleeve a cooperates with the wear-resistant ring to form a throttling bushing structure, that is, the first layer of sealing.

[0014] In a specific implementation example of the present invention, the inner hole of the balancing sleeve a is provided with a labyrinth seal, that is, a second layer of seal.

[0015] In a specific implementation example of the present invention, the drainage pipe a and the drainage pipe b are welded to the support pipe, and the two groups of support pipes are arranged in sequence axially and radially at 90 degrees, that is, the third layer of sealing.

[0016] In a specific implementation example of the present invention, the throttling orifice plate welded inside the support tube cooperates with the balancing sleeve b to form a throttling ring structure, ie, the fourth layer of sealing.

[0017] In a specific implementation example of the present invention, a packing seal, ie, a fifth layer of seal, is arranged above the water outlet seat.

[0018] In a specific implementation example of the present invention, an air blowing pipe is externally connected to the filler body, and a pressure air source is used to blow away the leaked molten salt at that location, which is the sixth layer of sealing.

[0019] In a specific implementation example of the present invention, the medium in the high-pressure zone is formed by the balancing sleeve a and the wear-resistant ring to form a throttling bushing structure, and then leaks into the support tube cavity through the labyrinth seal at the inner hole of the balancing sleeve a. Most of the leaked medium flows back to the molten salt storage tank through the leakage pipe a and the leakage pipe b. A small part of the leaked medium continues to climb up and passes through the throttling ring structure formed by the throttling orifice plate and the balancing sleeve b. A very small part of the leaked medium continues to climb up and finally reaches the packing seal composed of the packing gland, packing, packing ring, and balancing sleeve c, and the external air source blows the leaked medium through the blowing pipe, and finally the leaked medium all flows back to the molten salt storage tank to ensure that the conveying medium does not leak into the environment.

[0020] The positive progressive effect of the present invention is that the balanced sealing system for the photothermal molten salt cold pump provided by the present invention has the following advantages compared with the common technology: the present invention has a compact structure, is simple, low cost, leak-free, safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0022] Figure 2-1 This is one of the partial structural schematic diagrams of the present invention (A-1).

[0023] Figure 2-2 This is the second schematic diagram of the local structure of the present invention (A-2).

[0024] Figure 2-3 This is the third schematic diagram of the local structure of the present invention (A-3).

[0025] Figure 2-4 This is the fourth schematic diagram of the local structure of the present invention (A-4).

[0026] Figure 2-5 This is the fifth schematic diagram of the local structure of the present invention (A-5).

[0027] Figure 2-6 This is the sixth schematic diagram of the local structure of the present invention (A-6).

[0028] Figure 3 This is one of the schematic diagrams of the principle of the present invention.

[0029] The following are the names corresponding to the labels in the present invention:

[0030] Water outlet seat 1, shaft 2, support pipe 3, wear-resistant ring 4, balancing sleeve a5, saddle screw 6, retaining ring 7, discharge pipe a8, discharge pipe b9, throttling orifice plate 10, balancing sleeve b11, packing body 12, packing gland 13, packing 14, packing ring 15, balancing sleeve c16, stud 17, nut 18, key 19, air blowing pipe 20. DETAILED DESCRIPTION

[0031] Preferred embodiments of the present invention are given below in conjunction with the accompanying drawings to illustrate the technical solutions of the present invention in detail.

[0032] Figure 1 It is a schematic diagram of the overall structure of the present invention, as shown in Figure 1 As shown: The present invention provides a balanced sealing system for a photothermal molten salt cold pump, the balanced sealing system for a photothermal molten salt cold pump comprises: a six-layer sealing system, the six-layer sealing system is respectively Figure 1 A-1, A-2, A-3, A-4, A-5 and A-6.

[0033] The balanced sealing system for the photothermal molten salt cooling pump specifically includes: a water outlet seat 1, a shaft 2, a support pipe 3, a wear-resistant ring 4, a balancing sleeve a5, a saddle screw 6, a retaining ring 7, a drain pipe a8, a drain pipe b9, a throttling orifice plate 10, a balancing sleeve b11, a packing body 12, a packing gland 13, a packing 14, a packing ring 15, a balancing sleeve c16, a stud 17, a nut 18, a key 19, and an air blowing pipe 20.

[0034] The balancing sleeve a5, the balancing sleeve b11 and the balancing sleeve c16 are all fixed on the shaft 2 by the retaining ring 7 and the key 19, and the shaft 2 drives the balancing sleeve a5, the balancing sleeve b11 and the balancing sleeve c16 to rotate.

[0035] The wear-resistant ring 4 is fixed on the support pipe 3 , the drain pipe a8 and the drain pipe b9 are fixed on the support pipe 3 , and the support pipe 3 is fixed on the water outlet seat 1 .

[0036] The throttling orifice plate 10 is welded inside the support tube 3; the filler body 12 and the support tube 3 are welded to the cylinder of the water outlet seat 1 to form a channel.

[0037] The packing gland 13 is connected to the packing body 12 through fasteners, and the packing 14 and the packing ring 15 are installed inside the packing body 12 . The packing gland 13 is used to compress the packing 14 .

[0038] The air blowing pipe 20 is welded on the packing body 12 and communicated with the interior through the packing ring 15 , and the air blowing pipe 20 is communicated with an external air source.

[0039] Specifically, the wear-resistant ring 4 is fixed to the support pipe 3 by means of saddle screws 6, the drain pipe a8 and the drain pipe b9 are fixed to the support pipe 3 by means of welding, and the support pipe 3 is fixed to the water outlet seat 1 by means of rib plates.

[0040] The balanced sealing system for the photothermal molten salt cold pump proposed in the present invention comprises a six-layer sealing system, which specifically comprises:

[0041] Figure 2-1 It is one of the partial structural schematic diagrams of the present invention (A-1), such as Figure 2-1 The balancing sleeve a5 cooperates with the wear-resistant ring 4 to form a throttling bushing structure, that is, the first layer of sealing.

[0042] Figure 2-2 The second schematic diagram of the local structure of the present invention (A-2) is shown as follows: Figure 2-2 The inner hole of the balancing sleeve a5 is provided with a labyrinth seal, i.e. the second layer of seal.

[0043] Figure 2-3 The third schematic diagram of the local structure of the present invention (A-3) is shown as follows: Figure 2-3 The drainage pipe a8 and the drainage pipe b9 are welded on the support pipe 3. The two groups of support pipes are arranged in sequence axially and radially at 90 degrees, which is the third layer of sealing.

[0044] Figure 2-4 The fourth schematic diagram of the partial structure of the present invention (A-4) is shown as follows: Figure 2-4 The throttling orifice plate 10 welded inside the support tube 3 cooperates with the balancing sleeve b11 to form a throttling ring structure, that is, the fourth layer of sealing.

[0045] Figure 2-5The fifth schematic diagram of the local structure of the present invention (A-5) is shown as follows: Figure 2-5 A packing seal, i.e., the fifth layer of seal, is arranged above the water outlet seat 1 .

[0046] Figure 2-6 This is the sixth partial structural diagram of the present invention (A-6), as shown in FIG. Figure 2-6 The filler body 12 is externally connected to an air blowing pipe 20, and the leaked molten salt is purged by a pressure gas source, which is the sixth layer of sealing.

[0047] like Figure 3 As shown, the medium in the high-pressure zone forms a throttling bushing structure through the balancing sleeve a5 and the wear-resistant ring 4, and then leaks into the cavity of the support tube 3 through the labyrinth seal at the inner hole of the balancing sleeve a5. Most of the leaked medium flows back to the molten salt storage tank through the leakage pipe a8 and the leakage pipe b9. A small part of the leaked medium continues to climb up and passes through the throttling ring structure formed by the throttling orifice plate 10 and the balancing sleeve b11. A very small part of the leaked medium continues to climb up and finally reaches the packing seal composed of the packing gland 13, the packing 14, the packing ring 15, and the balancing sleeve c16. The external air source blows the leaked medium through the blowing pipe 20, and finally the leaked medium flows back to the molten salt storage tank to ensure that the conveying medium does not leak into the environment, thereby achieving a sealing effect.

[0048] like Figure 3 As shown, the balance sleeve forms a force from the high-pressure area to the low-pressure area due to the pressure difference between the front and rear. This force can balance the huge axial force generated by the water pump impeller when it is working.

[0049] Compared with the traditional balance hole plus mechanical seal type, this design has the advantages of compact structure, simplicity, low cost, no leakage, safety and reliability.

[0050] The present invention provides a balanced sealing system for a photothermal molten salt cold pump, which reduces leakage loss and effectively balances axial force, and can be applied to projects such as photothermal molten salt cold pumps.

[0051] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected, and the scope of the present invention to be protected is defined by the attached claims and their equivalents.

Claims

1. A balanced sealing system for a photothermal molten salt cold pump, characterized in that: The balanced sealing system for the photothermal molten salt cold pump comprises: a water outlet seat, a shaft, a support pipe, a wear-resistant ring, a balancing sleeve a, a clamping ring, a discharge pipe a, a discharge pipe b, a throttling orifice plate, a balancing sleeve b, a packing body, a packing gland, a packing, a packing ring, a balancing sleeve c, a stud, a nut, a key, and an air blowing pipe; The balancing sleeves a, b and c are all fixed on the shaft by snap rings and keys, and the shaft drives the balancing sleeves a5, b and c to rotate; The wear-resistant ring is fixed on the support pipe, the discharge pipe a and the discharge pipe b are fixed on the support pipe, and the support pipe is fixed on the water outlet seat; The throttling orifice plate is welded inside the support tube; the filler body and the support tube are welded on the cylinder of the water outlet seat to form a channel; The packing gland is connected to the packing body through fasteners, the packing and packing ring are installed inside the packing body, and the packing gland is used to compress the packing; The air blowing pipe is welded on the packing body, connected to the interior through the packing ring, and connected to the external air source; The balanced sealing system for the photothermal molten salt cold pump includes a six-layer sealing system.

2. The balanced sealing system for a photothermal molten salt cold pump according to claim 1 is characterized in that: The wear-resistant ring is fixed to the support pipe by means of saddle screws, the drain pipe a and the drain pipe b are fixed to the support pipe by means of welding, and the support pipe is fixed to the water outlet seat by means of a rib plate.

3. The balanced sealing system for the photothermal molten salt cold pump according to claim 1 is characterized in that: The first layer in the six-layer sealing system is: the balancing sleeve a cooperates with the wear-resistant ring to form a throttling bushing structure, that is, the first layer of sealing.

4. The balanced sealing system for a photothermal molten salt cold pump according to claim 1 is characterized in that: The inner hole of the balancing sleeve a is provided with a labyrinth seal, i.e., the second layer of seal.

5. The balanced sealing system for a photothermal molten salt cold pump according to claim 1 is characterized in that: The drainage pipe a and the drainage pipe b are welded on the support pipe, and the two groups of support pipes are arranged in sequence axially and radially at 90 degrees, which is the third layer of sealing.

6. The balanced sealing system for a photothermal molten salt cold pump according to claim 1, characterized in that: The throttling orifice plate welded inside the support tube cooperates with the balance sleeve b to form a throttling ring structure, that is, the fourth layer of sealing.

7. The balanced sealing system for a photothermal molten salt cold pump according to claim 1, characterized in that: A packing seal, i.e., the fifth layer of seal, is arranged above the water outlet seat.

8. The balanced sealing system for a photothermal molten salt cold pump according to claim 1, characterized in that: The filler body is externally connected with an air blowing pipe, and the leaked molten salt is purged by using a pressure air source, which is the sixth layer of sealing.

9. The balanced sealing system for a photothermal molten salt cold pump according to claim 1, characterized in that: The medium in the high-pressure area forms a throttling bushing structure through the balancing sleeve a and the wear-resistant ring, and then leaks into the support pipe cavity through the labyrinth seal at the inner hole of the balancing sleeve a. Most of the leaked medium flows back to the molten salt storage tank through the leakage pipe a and the leakage pipe b. A small part of the leaked medium continues to climb up and passes through the throttling ring structure formed by the throttling orifice plate and the balancing sleeve b. A very small part of the leaked medium continues to climb up and finally reaches the packing seal composed of the packing gland, packing, packing ring and balancing sleeve c. The external air source blows the leaked medium through the blowing pipe, and finally the leaked medium flows back to the molten salt storage tank to ensure that the conveying medium does not leak into the environment.

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