Mechanical seal flushing water system

Abstract

The utility model discloses a mechanical seal flushing water system, relates to the technical field of delivery pumps, and mainly aims to optimize a pump body mechanical seal structure and control the leakage condition of a pump body delivery medium. According to the main technical scheme, the mechanical seal flushing water system comprises a throttling shaft sleeve and a mechanical seal shaft sleeve. The throttling shaft sleeve is fixedly arranged on the inner edge of the pump body; the mechanical seal shaft sleeve is fixedly connected to the shaft side of the pump shaft; wherein the throttling shaft sleeve corresponds to the mechanical seal shaft sleeve, the throttling shaft sleeve is located between the volute impeller and the mechanical seal chamber, a plurality of first ring teeth are sequentially arranged on the inner edge face of the throttling shaft sleeve, and a plurality of second ring teeth are sequentially arranged on the outer edge face of the mechanical seal shaft sleeve.

Description

Technical Field

[0001] The utility model relates to the technical field of delivery pumps, in particular to a mechanical seal flushing water system. Background Art

[0002] The melamine solution contains granular OAT and melamine crystallization crystals. When the OAT and melamine crystallization crystals enter the sealing surface of the mechanical seal, it intensifies the wear of the mechanical seal and causes the mechanical seal to leak. Therefore, it is necessary to add a flushing water system to timely flush away the particulate matter adhering to the mechanical seal to reduce wear. The traditional flushing water system controls the flushing water by designing the flow rate. At the initial stage of equipment operation, the flushing water flow rate is too large, resulting in high water consumption of the system. At the end stage of equipment operation, the flushing water flow rate is too small to timely wash away the deposited particulate matter, resulting in easy damage and leakage of the mechanical seal. Content of the Utility Model

[0003] In view of this, the utility model provides a mechanical seal flushing water system, and the main purpose is to optimize the mechanical seal structure of the pump body and control the leakage of the medium transported by the pump body.

[0004] To achieve the above purpose, the utility model mainly provides the following technical solutions:

[0005] The utility model provides a mechanical seal flushing water system, which includes: a throttling shaft sleeve and a mechanical seal shaft sleeve;

[0006] The throttling shaft sleeve is fixedly arranged on the inner edge of the pump body;

[0007] The mechanical seal shaft sleeve is fixedly connected to the side of the pump shaft;

[0008] Wherein, the throttling shaft sleeve and the mechanical seal shaft sleeve correspond to each other. The throttling shaft sleeve is located between the volute impeller and the mechanical seal chamber. A plurality of first ring teeth are arranged in sequence on the inner edge surface of the throttling shaft sleeve, and a plurality of second ring teeth are arranged in sequence on the outer edge surface of the mechanical seal shaft sleeve.

[0009] The purpose of the utility model and the solution of its technical problems can be further realized by adopting the following technical measures.

[0010] Optionally, it further includes a flushing water pipe, one end of the flushing water pipe is connected to a flushing water pump, and the other end is connected to the inlet end of the mechanical seal chamber.

[0011] Optionally, a plurality of the first ring teeth and a plurality of the second ring teeth are arranged in a staggered manner.

[0012] Optionally, it further includes a Y-shaped filter, and the Y-shaped filter is installed on the flushing water pipe.

[0013] Optionally, it further includes a magnetic filter, and the magnetic filter is installed on the flushing water pipe between the flushing water pump and the Y-shaped filter.

[0014] Optionally, a one-way valve is further included, and the one-way valve is installed on the flushing water pipe between the Y-shaped filter and the mechanical seal chamber.

[0015] Optionally, the outer edge of the throttle bush is in interference fit with the inner edge of the pump body.

[0016] By means of the above technical solution, the utility model has at least the following advantages:

[0017] The mechanical seal flushing water with the same flow rate enters the mechanical seal chamber, and then enters the position of the impeller of the pump body volute through the gap between the throttle bush and the mechanical seal bush.

[0018] Due to the arrangement of the first ring teeth and the second ring teeth, when the mechanical seal flushing water flows through the gap between the throttle bush and the mechanical seal bush, the resistance received is large, and a greater water pressure can be formed in the mechanical seal chamber, so that it is easier for the flushing water pressure in the mechanical seal chamber to be higher than the pressure of the conveying medium in the pump body, thereby making it easier to prevent the conveying medium from entering the mechanical seal chamber and ensuring the cleanliness of the flushing water in the mechanical seal chamber. Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of a mechanical seal flushing water system provided by an embodiment of the utility model;

[0020] Figure 2 It is Figure 1 An enlarged view of part A in

[0021] The reference numerals in the drawings of the specification include: throttle bush 1, mechanical seal bush 2, pump body 3, pump shaft 4, mechanical seal chamber 5, first ring teeth 6, second ring teeth 7, mechanical seal gland 8, stationary ring 9, rotating ring 10, flushing water pipe 11, flushing water pump 12, Y-shaped filter 13, magnetic filter 14, one-way valve 15, pressure regulating valve 16, pressure gauge 17, thermometer 18, cut-off valve 19, flowmeter 20. Detailed Description of the Preferred Embodiments

[0022] To further elaborate on the technical means and effects adopted by the utility model to achieve the intended utility model purpose, the following is a detailed description of the specific implementation manners, structures, features, and effects of the application according to the utility model with reference to the drawings and preferred embodiments. In the following description, different "one embodiment" or "embodiment" do not necessarily refer to the same embodiment. In addition, the specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0023] The present utility model will be further described in detail below with reference to the drawings and embodiments.

[0024] As Figure 1 shown, a mechanical seal flushing water system provided by an embodiment of the utility model includes: a throttle bush 1 and a mechanical seal bush 2;

[0025] The throttling bushing 1 is fixedly arranged on the inner edge of the pump body 3;

[0026] The mechanical seal bushing 2 is fixedly connected to the shaft side of the pump shaft 4;

[0027] Wherein, the throttling bushing 1 and the mechanical seal bushing 2 correspond to each other. The throttling bushing 1 is located between the volute impeller and the mechanical seal chamber 5. A plurality of first ring teeth 6 are arranged in sequence on the inner edge surface of the throttling bushing 1, and a plurality of second ring teeth 7 are arranged in sequence on the outer edge surface of the mechanical seal bushing 2.

[0028] The working process of the mechanical seal flushing water system is as follows:

[0029] The mechanical seal flushing water with the same flow rate enters the mechanical seal chamber 5, and then enters the position of the volute impeller of the pump body 3 through the gap between the throttling bushing 1 and the mechanical seal bushing 2.

[0030] Due to the arrangement of the first ring teeth 6 and the second ring teeth 7, when the mechanical seal flushing water flows through the gap between the throttling bushing 1 and the mechanical seal bushing 2, the resistance it receives is large, and a greater water pressure can be formed in the mechanical seal chamber 5, so that it is easier for the flushing water pressure in the mechanical seal chamber 5 to be higher than the pressure of the conveying medium in the pump body 3, thereby making it easier to prevent the conveying medium from entering the mechanical seal chamber 5 and ensuring the cleanliness of the flushing water in the mechanical seal chamber 5.

[0031] Specifically, a mechanical seal gland 8 is arranged at one end of the mechanical seal chamber 5 away from the throttling bushing 1. The stationary ring 9 is fixedly connected to the inner edge of the mechanical seal gland 8 through a pin, and the rotating ring 10 is sleeved on the shaft side of the pump shaft 4 in the mechanical seal chamber 5.

[0032] In a specific embodiment, it further includes a flushing water pipe 11. One end of the flushing water pipe 11 is connected to a flushing water pump 12, and the other end is connected to the inlet end of the mechanical seal chamber 5.

[0033] In this embodiment, specifically, the flushing water pump 12 conveys the water from the external water source to the mechanical seal chamber 5 to form a certain water pressure in the mechanical seal chamber 5.

[0034] As Figure 2 shown, in a specific embodiment, the plurality of first ring teeth 6 and the plurality of second ring teeth 7 are arranged in an alternating manner.

[0035] In this embodiment, specifically, the plurality of first ring teeth 6 and the plurality of second ring teeth 7 are arranged in an alternating manner, which largely avoids the inner edges of the first ring teeth 6 and the second ring teeth 7 from contacting each other, thereby preferably avoiding mechanical friction. To a certain extent, a flow deflection channel is formed at the gap between the throttling bushing 1 and the mechanical seal bushing 2, prolonging the residence time of the flushing water at this gap and further increasing the flushing water pressure in the mechanical seal chamber 5.

[0036] In the specific embodiment, it further includes a Y-type filter 13, and the Y-type filter 13 is installed on the flushing water pipe 11.

[0037] In this embodiment, specifically, the Y-type filter 13 is used to remove mechanical impurities in the flushing water.

[0038] In the specific embodiment, it further includes a magnetic filter 14, and the magnetic filter 14 is installed on the flushing water pipe 11 between the flushing water pump 12 and the Y-type filter 13.

[0039] In this embodiment, specifically, the magnetic filter 14 is used to remove magnetic impurities in the flushing water.

[0040] In the specific embodiment, it further includes a check valve 15, and the check valve 15 is installed on the flushing water pipe 11 between the Y-type filter 13 and the mechanical seal chamber 5.

[0041] In this embodiment, specifically, the inlet of the check valve 15 is connected to the Y-type filter 13, and the outlet of the check valve 15 is connected to the mechanical seal chamber 5. When the pressure of the mechanical seal flushing water is lower than the pressure of the medium transported by the pump body 3, it is used to prevent the medium transported by the pump body 3 from flowing back into the flushing water pipe 11.

[0042] Specifically, a pressure regulating valve 16 is provided on the flushing water pipe 11 between the check valve 15 and the Y-type filter 13, and a pressure gauge 17 and a thermometer 18 are provided on the flushing water pipe 11 between the check valve 15 and the mechanical seal chamber 5. Among them, the pressure gauge 17 is close to the mechanical seal chamber 5 and the measurement is more accurate. A cut-off valve 19 and a flow meter 20 are provided on the flushing water pipe 11 between the magnetic filter 14 and the flushing water pump 12. The reading of the flow meter 20 is only used as a monitoring index for the sealing condition of the mechanical seal chamber 5 and is not used as a control index for the flushing water system.

[0043] Specifically, the check valve 15, the pressure regulating valve 16 and the cut-off valve 19 are all connected by flanges, and all the gaskets are metal wound gaskets to improve the reliability of the system.

[0044] Specifically, the flushing water pipe 11 is made of S304 material, the pipeline is welded by argon arc welding, and the inside of the pipe is pickled and qualified after welding to ensure the cleanliness of the flushing water pipe 11.

[0045] Specifically, by monitoring and adjusting the pressure of the mechanical seal chamber 5 to ensure that there is a certain pressure difference between the flushing water pressure of the mechanical seal chamber 5 and the pressure of the medium transported by the pump body 3, so as to ensure that the medium transported by the pump body 3 cannot enter the mechanical seal chamber 5, which not only saves flushing water but also ensures the cleanliness of the mechanical seal chamber 5.

[0046] In the specific embodiment, the outer edge of the throttle shaft sleeve 1 is in interference fit with the inner edge of the pump body 3.

[0047] In this embodiment, specifically, the outer diameter of the throttle bush 1 is in interference fit with the inner diameter of the pump body 3 and is fixed in the pump body 3 with a pin to stabilize the relative positions of the throttle bush 1 and the pump body 3.

[0048] Specifically, the main control index of this system is the flushing water pressure in the mechanical seal chamber 5, which must be 0.15 - 0.30 MPa higher than the system pressure.

[0049] As mentioned above, the above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A mechanical seal flushing water system, characterized in that, Comprising: A throttle bush, which is fixedly arranged on the inner edge of the pump body; A mechanical seal bush, which is fixedly connected to the shaft side of the pump shaft; Wherein, the throttle bush and the mechanical seal bush correspond to each other. The throttle bush is located between the volute impeller and the mechanical seal chamber. A plurality of first ring teeth are arranged in sequence on the inner edge surface of the throttle bush, and a plurality of second ring teeth are arranged in sequence on the outer edge surface of the mechanical seal bush.

2. The mechanical seal flushing water system according to claim 1, characterized in that It further includes a flushing water pipe, one end of which is connected to a flushing water pump, and the other end is connected to the inlet end of the mechanical seal chamber.

3. The mechanical seal flushing water system according to claim 1, characterized in that The plurality of first ring teeth and the plurality of second ring teeth are arranged in an alternating manner.

4. The mechanical seal flushing water system according to claim 2, characterized in that It further includes a Y-type filter, which is installed on the flushing water pipe.

5. The mechanical seal flushing water system according to claim 4, characterized in that It further includes a magnetic filter, which is installed on the flushing water pipe between the flushing water pump and the Y-type filter.

6. The mechanical seal flushing water system according to claim 4, characterized in that It further includes a check valve, which is installed on the flushing water pipe between the Y-type filter and the mechanical seal chamber.

7. The mechanical seal flushing water system according to any one of claims 1 to 6, characterized in that The outer edge of the throttle bush is in interference fit with the inner edge of the pump body.

Images