Double-mechanical-seal combined sealing system

Abstract

The utility model discloses a novel double-mechanical-seal combined sealing system which comprises a double-mechanical-seal device and a transparent pre-filter, the pre-filter is provided with a filter inlet and a filter outlet, the filter inlet and the filter outlet are communicated with the interior of the pre-filter, the double-mechanical-seal inlet is communicated with the filter outlet through an upper connecting pipe, and the double-mechanical-seal device is connected with the pre-filter through a lower connecting pipe. The outlet of the double mechanical seal is communicated with the inlet of the filter through a lower connecting pipe; mechanical seal lubricating liquid in the transparent pre-filter circularly flows in the mechanical seal and the pre-filter, so that the mechanical seal is lubricated and cooled, and the quality, color and volume change of a lubricating medium can be observed; if the first seal leaks, the severity degree of leakage can be known through the color and the amount of liquid flowing into the transparent prefilter, and if the second seal leaks, the leakage condition can be known through the amount of the liquid in the transparent prefilter; therefore, the prefilter and the double mechanical seals are combined to form a sealing system with high cost performance.

Description

TECHNICAL FIELD

[0001] The utility model relates to a sealing technical field especially relates to a double machine seal combination sealing system. BACKGROUND

[0002] Double end face mechanical seal has two end face seals, if primary seal fails, secondary seal can still seal, prevent leakage, commonly used in the chemical industry with higher sealing requirements, it has the following advantages:

[0003] High efficiency and energy saving: the transmission efficiency of double machine seal cooling pump is high, can effectively reduce energy consumption, according to actual data statistics, adopts double machine seal cooling pump and can realize energy saving 30%-40% or more.

[0004] Stable and reliable: double machine seal adopts forced circulation lubrication and cooling system, can greatly prolong the service life of mechanical seal, guarantees the long-term stable operation of pump.

[0005] Environmental protection and energy saving: double machine seal greatly reduces leakage, can guarantee the cleanness of lubricating medium, and will not cause pollution to the environment.

[0006] API682 mechanical seal flushing scheme Plan53 is used with pressure isolation liquid to lubricate and cool double machine seal, is widely used in traditional petrochemical field, but this sealing system has the defects of high price, high requirement to control system, large floor area, in many small and medium-sized chemical enterprises cannot be recognized, but more needs a kind of low price, no leakage, reliable lubrication and small installation space sealing system.

[0007] The purpose of the present application is to provide a kind of double machine seal combination sealing system, can retain the advantages of double machine seal, simultaneously, realize the high cost-effective solution of double machine seal lubrication, cooling and visual observation, batch, high performance price ratio. UTILITY MODEL CONTENTS

[0008] In view of the problems in the related art, the present application discloses a double machine seal combination sealing system, which retains the advantages of double machine seal and realizes the high cost-effective advantage of the machine seal lubrication system.

[0009] To achieve the above object, the present application provides the following technical scheme:

[0010] A double mechanical seal combination sealing system, comprising a pump head device, the pump head device is connected with a double mechanical seal device, the double mechanical seal device is provided with a double mechanical seal inlet and a double mechanical seal outlet, the double mechanical seal inlet and the double mechanical seal outlet are communicated with the inside of the double mechanical seal device, further comprising a transparent pre-filter, the pre-filter is provided with a filter inlet and a filter outlet, the filter inlet and the filter outlet are communicated with the inside of the pre-filter, the double mechanical seal inlet is communicated with the filter outlet through an upper connecting pipe, and the double mechanical seal outlet is communicated with the filter inlet through a lower connecting pipe.

[0011] As a further scheme of the present application, the upper part of the pre-filter is provided with a blowdown port, through which the mechanical seal lubricating liquid can be injected into the pre-filter or discharged from the pre-filter.

[0012] As a further scheme of the present application, the pre-filter container part is made of transparent material.

[0013] In summary, the present application has the following beneficial effects:

[0014] A double mechanical seal combination sealing system, comprising a pump head device, the pump head device is connected with a double mechanical seal device, the double mechanical seal device is provided with a double mechanical seal inlet and a double mechanical seal outlet, the double mechanical seal inlet and the double mechanical seal outlet are communicated with the inside of the double mechanical seal device, further comprising a transparent pre-filter, the pre-filter is provided with a filter inlet and a filter outlet, the filter inlet and the filter outlet are communicated with the inside of the pre-filter, the double mechanical seal inlet is communicated with the filter outlet through an upper connecting pipe, and the double mechanical seal outlet is communicated with the filter inlet through a lower connecting pipe.

[0015] The mechanical seal lubricating liquid is added into the transparent pre-filter and flows into the double mechanical seal device, so that the pressure-free mechanical seal lubricating liquid is obtained, when the pump is running, the lubricating medium circulates and flows in the mechanical seal and the pre-filter, so that the mechanical seal is lubricated and cooled, and the changes of the lubricating medium in the transparent pre-filter, such as color and volume, can be observed.

[0016] If the first seal leaks, the severity of the leakage can be known according to the color and amount of the liquid flowing into the transparent pre-filter, and if the second seal leaks, the leakage can be known according to the amount of the liquid in the transparent pre-filter, so that the pre-filter and the double mechanical seal combination form a high cost-effective sealing system. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, illustrate the present application and are used to explain the present application, but do not constitute a limitation on the present application.

[0018] In the drawings:

[0019] Figure 1 This is a three-dimensional structural diagram of this application.

[0020] Figure label annotations:

[0021] 1. Dual mechanical seal device; 1a. Dual mechanical seal inlet; 1b. Dual mechanical seal outlet; 2. Pre-filter; 2a. Filter inlet; 2b. Filter outlet; 2c. Drain outlet; 3. Upper connecting pipe; 4. Lower connecting pipe; 5. Pump head device; 6. Clamp; 7. Screw; 8. Base; Detailed Implementation

[0022] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects disclosed in this embodiment as detailed in the appended claims.

[0023] It should be noted that all directional indicators in the embodiments (such as up, down, left, right, front, back, etc.) are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0024] Furthermore, the use of terms such as "first" and "second" in the embodiments is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit this application. It is merely to distinguish components or operations described using the same technical terms and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but only if they are feasible for those skilled in the art. If a combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0025] To further understand the content, features, and effects of this application, the following embodiments are provided, and detailed descriptions are given below in conjunction with the accompanying drawings:

[0026] like Figure 1 As shown:

[0027] The dual mechanical seal combined sealing system includes a pump head device 5, which is connected to a dual mechanical seal device 1. The dual mechanical seal device 1 has a dual mechanical seal inlet 1a and a dual mechanical seal outlet 1b. The dual mechanical seal inlet 1a is located above the dual mechanical seal outlet 1b, and the dual mechanical seal inlet 1a and the dual mechanical seal outlet 1b are connected to the interior of the dual mechanical seal device 1.

[0028] It also includes a transparent pre-filter 2, the container of which is made of transparent material.

[0029] The pre-filter 2 is a household pre-filter. The pre-filter 2 has a filter inlet 2a and a filter outlet 2b on both sides. The filter inlet 2a and the filter outlet 2b are connected to the inside of the pre-filter 2. The dual mechanical seal inlet 1a and the filter outlet 2b are connected through the upper connecting pipe 3. The dual mechanical seal outlet 1b and the filter inlet 2a are connected through the lower connecting pipe 4.

[0030] The pre-filter 2 is provided with a drain port 2c at the top. Mechanical seal lubricating liquid can be injected into the pre-filter 2 through the drain port 2c, or the mechanical seal lubricating liquid can be discharged from the pre-filter 2.

[0031] The pump head device 5 has a base 8 fixedly installed at the bottom. A pre-filter 2 is fixedly installed on one side of the base 8 by a fixing device. The fixing device includes a lead screw 7. The bottom end of the lead screw 7 is fixedly connected to the base 8. A clamp 6 is fixedly installed at the top end of the lead screw 7. The clamp 6 is fixedly connected to the filter inlet 2a and the filter outlet 2b respectively.

[0032] The dual mechanical seal outlet 1b of the dual mechanical seal device 1 and the filter inlet 2a of the pre-filter 2 are connected by a lower connecting pipe 4. The dual mechanical seal inlet 1a of the dual mechanical seal device 1 and the filter outlet 2b of the pre-filter 2 are connected by an upper connecting pipe 3. Mechanical seal lubricating liquid is added through the drain port 2c of the pre-filter 2 into the transparent pre-filter 2, and then flows into the dual mechanical seal outlet 1b through the lower connecting pipe 4 and into the dual mechanical seal device 1.

[0033] When the pump is running, the dual mechanical seal device 1 pumps the mechanical seal lubricating fluid from the dual mechanical seal outlet 1b, through the lower connecting pipe 4 and the filter inlet 2a, and into the transparent pre-filter 2. After being cooled by convection in the pre-filter 2, it flows out from the filter outlet 2b, through the upper connecting pipe 3 into the dual mechanical seal inlet 1a, and flows back into the dual mechanical seal device 1. The flow repeats and circulates, thereby achieving the functions of lubrication and heat dissipation for the dual mechanical seal device 1. At the same time, since the pre-filter 2 is transparent, the quality, color, and volume changes of the lubricating medium can be observed.

[0034] If the first seal leaks, the severity of the leak can be determined by observing the color and amount of liquid flowing into the transparent pre-filter 2; if the second seal leaks, the extent of the leak can be determined by observing how much liquid has decreased within the transparent pre-filter 2.

[0035] The above-mentioned combined sealing system can be applied to many chemical industries that require low leakage risk, high environmental protection requirements, small footprint, and simple and easy maintenance and observation, such as resin, glue, and reaction vessel industries. The combined sealing system has a high cost performance.

[0036] Finally, it should be noted that the above disclosure is merely a preferred embodiment of this application and is not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application. The scope of this application is limited only by the appended claims.

Claims

1. A dual mechanical seal combined sealing system, comprising a pump head assembly (5), wherein the pump head assembly (5) is connected to a dual mechanical seal assembly (1), the dual mechanical seal assembly (1) having a dual mechanical seal inlet (1a) and a dual mechanical seal outlet (1b), the dual mechanical seal inlet (1a) and the dual mechanical seal outlet (1b) being in communication with the interior of the dual mechanical seal assembly (1), characterized in that: It also includes a transparent pre-filter (2), which has a filter inlet (2a) and a filter outlet (2b). The filter inlet (2a) and the filter outlet (2b) are connected to the interior of the pre-filter (2). The dual mechanical seal inlet (1a) and the filter outlet (2b) are connected through an upper connecting pipe (3), and the dual mechanical seal outlet (1b) and the filter inlet (2a) are connected through a lower connecting pipe (4).

2. The dual mechanical seal combined sealing system according to claim 1, characterized in that: The pre-filter (2) is provided with a drain port (2c) at the top. Mechanical seal lubricating liquid can be injected into the pre-filter (2) through the drain port (2c) or discharged from the pre-filter (2).

3. The dual mechanical seal combined sealing system according to claim 1, characterized in that: The container portion of the pre-filter (2) is made of transparent material.

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