A double-sealed chemical process pump

Abstract

This utility model discloses a double-sealed chemical process pump, relating to the technical field of chemical process pumps. It includes a fixed motor and a pump head. A second connecting flange is fixedly installed on the side of the fixed motor, and a first connecting flange is fixedly installed on the side of the pump head. The first connecting flange is connected to the second connecting flange. This double-sealed chemical process pump utilizes a water-swellable rubber ring. When the first layer of seal leaks—that is, when leakage occurs between the first sealing strip and the first sealing groove—the fluid medium comes into contact with the interior of the water-swellable rubber ring. At this time, the water-swellable rubber ring expands, fitting tightly against the interior of the fixed cavity and forming a seal. This improves the sealing effect of the connection between the first and second connecting flanges, facilitates disassembly and assembly, reduces installation difficulty, and allows for quick assessment of the pump's sealing condition for subsequent operations.

Description

Technical Field

[0001] This utility model relates to the field of chemical process pump technology, and more specifically, to a double-sealed chemical process pump. Background Technology

[0002] In chemical or petrochemical production, pumps operate under conditions of high temperature, low temperature or ultra-low temperature, high pressure, flammable, explosive, toxic and highly corrosive media. Chemical process pumps are also characterized by their ability to operate under conditions of high inlet pressure, high head, high viscosity, low flow rate, and high cavitation, placing extremely stringent requirements on their performance, particularly regarding corrosion resistance, leak tolerance, and wear resistance. To meet the special requirements of chemical production, the chemical machinery industry also manufactures specialized chemical pumps, such as plastic pumps, glass pumps, ceramic pumps, graphite pumps, shielded pumps, magnetic drive pumps, and impurity pumps.

[0003] During the installation of existing process pumps, the numerous threaded holes on the flanges make it difficult for operators to align the two flanges and secure them with bolts. This easily leads to gaps between the two flanges, causing leaks and increasing the difficulty of installation. Utility Model Content

[0004] The main objective of this invention is to provide a double-sealed chemical process pump that can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A double-sealed chemical process pump includes a fixed motor and a pump head. A second connecting flange is fixedly installed on the side of the fixed motor, and a first connecting flange is fixedly installed on the side of the pump head. The first connecting flange is connected to the second connecting flange.

[0007] The second connecting flange includes a second connecting plate. Multiple fixing seats are fixedly installed on the outer surface of the second connecting plate. An interlocking groove is provided inside the fixing seat. A second limiting ring is fixedly installed on the side of the second connecting plate. A second sealing strip is embedded in the inside of the second limiting ring. A fixing tank is fixedly installed on the side of the fixing seat. A fixing groove is provided on the outer surface of the fixing tank. A water-swellable rubber ring is fixedly sleeved on the outer surface of the fixing groove. A first limiting ring is fixedly installed on the left side of the fixing tank. A first sealing strip is embedded in the inside of the first limiting ring.

[0008] Preferably, the first connecting flange includes a pump housing, a first connecting plate is fixedly installed on the right side of the pump housing, a plurality of fixing blocks are fixedly installed on the outer surface of the first connecting plate, a fixing screw is rotatably installed on the outer surface of the fixing block, a fixing nut is threaded on the outer surface of the fixing screw, a second sealing groove is provided on the right side of the first connecting plate, and a fixing cavity and a first sealing groove are provided on the right side of the first connecting plate.

[0009] Preferably, the fixing screw is sleeved and installed inside the fitting groove and fixedly connected by a fixing nut, the second sealing strip is fitted inside the second sealing groove, the water-swellable rubber ring is located inside the fixing cavity, and the first sealing strip is fitted inside the first sealing groove.

[0010] Preferably, the top of the first connecting plate has a movable groove, and a fixed protrusion is movably sleeved inside the movable groove. A top rod is fixedly installed at the bottom of the fixed protrusion. A movable cavity is opened at the upper end of the first connecting plate. A movable block is fixedly sleeved on the outer surface of the lower end of the top rod. The movable block is movably sleeved inside the movable cavity. Both ends of the top of the movable block are fixedly installed with return springs. The return springs are located between the movable block and the movable cavity. The top rod is movably sleeved inside the fixed cavity and the first connecting plate.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. By setting a water-swellable rubber ring, when the first layer of seal leaks, that is, when leakage occurs between the first sealing strip and the first sealing groove, the fluid medium will come into contact with the inside of the water-swellable rubber ring. At this time, the water-swellable rubber ring will expand, so that the water-swellable rubber ring fits into the inside of the fixed cavity and forms a seal with the fixed cavity, thereby improving the sealing effect of the connection between the first connecting flange and the second connecting flange.

[0013] 2. By engaging the fixing screw inside the interlocking groove and fixing the first connecting plate and the second connecting plate by rotating the fixing nut, disassembly and assembly are convenient and the installation difficulty is reduced;

[0014] 3. By setting fixed protrusions and movable blocks, when a leak occurs in the first layer of seal, the water-swellable rubber ring will expand when it comes into contact with the liquid medium. The expanded water-swellable rubber ring pushes the push rod to move outward, causing the fixed protrusion to move to the top of the first connecting plate. The operator can judge whether the seal will leak by observing the protrusion of the fixed protrusion at the top of the first connecting plate, and quickly understand the sealing condition of the chemical pump for subsequent work. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the first and second connecting flanges of this utility model;

[0017] Figure 3 This is a schematic diagram of the first connecting flange structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the second connecting flange structure of this utility model;

[0019] Figure 5 For the present utility model Figure 2 Schematic diagram of the structure at point A in the middle.

[0020] The attached figures are labeled as follows: 1. Fixed motor; 2. Pump head; 3. First connecting flange; 4. Second connecting flange; 31. Pump casing; 32. First connecting plate; 33. Fixing block; 34. Fixing screw; 35. Fixing nut; 36. First sealing groove; 37. Fixed cavity; 38. Second sealing groove; 39. Fixing protrusion; 310. Movable cavity; 311. Push rod; 312. Moving block; 313. Return spring; 41. Second connecting plate; 42. Fixed seat; 43. Fitting groove; 44. Second limiting ring; 45. Second sealing strip; 46. Fixed tank; 47. Fixing groove; 48. Water-swellable rubber ring; 49. First limiting ring; 410. First sealing strip. Detailed Implementation

[0021] To make the technical problems, technical solutions and advantages of this utility model clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0022] As attached Figure 1 To be continued Figure 4 As shown, an embodiment of this utility model provides a double-sealed chemical process pump, including a fixed motor 1 and a pump head 2. A second connecting flange 4 is fixedly installed on the side of the fixed motor 1, and a first connecting flange 3 is fixedly installed on the side of the pump head 2. The first connecting flange 3 is connected to the second connecting flange 4.

[0023] like Figure 4 As shown, the second connecting flange 4 includes a second connecting plate 41. A plurality of fixing seats 42 are fixedly installed on the outer surface of the second connecting plate 41. An interlocking groove 43 is opened inside the fixing seat 42. A second limiting ring 44 is fixedly installed on the side of the second connecting plate 41. A second sealing strip 45 is embedded in the inside of the second limiting ring 44. A fixing tank 46 is fixedly installed on the side of the fixing seat 42. A fixing groove 47 is opened on the outer surface of the fixing tank 46. A water-swellable rubber ring 48 is fixedly sleeved on the outer surface of the fixing groove 47. A first limiting ring 49 is fixedly installed on the left side of the fixing tank 46. A first sealing strip 410 is embedded in the inside of the first limiting ring 49.

[0024] By setting a water-swellable rubber ring 48, when the first layer of seal leaks, that is, when leakage occurs between the first sealing strip 410 and the first sealing groove 36, the fluid medium will come into contact with the inside of the water-swellable rubber ring 48. At this time, the water-swellable rubber ring 48 will expand, causing it to fit into the inside of the fixed cavity 37 and form a seal with the fixed cavity 37, thereby improving the sealing effect of the connection between the first connecting flange 3 and the second connecting flange 4.

[0025] like Figure 5 As shown, the first connecting flange 3 includes a pump housing 31. A first connecting plate 32 is fixedly installed on the right side of the pump housing 31. Multiple fixing blocks 33 are fixedly installed on the outer surface of the first connecting plate 32. Fixing screws 34 are rotatably installed on the outer surface of the fixing blocks 33. Fixing nuts 35 are threaded on the outer surface of the fixing screws 34. A second sealing groove 38 is opened on the right side of the first connecting plate 32. A fixing cavity 37 and a first sealing groove 36 are opened on the right side of the first connecting plate 32.

[0026] The fixing screw 34 is sleeved and installed inside the fitting groove 43 and fixedly connected by the fixing nut 35. The second sealing strip 45 is fitted inside the second sealing groove 38. The water-swellable rubber ring 48 is located inside the fixing cavity 37. The first sealing strip 410 is fitted inside the first sealing groove 36.

[0027] By engaging the fixing screw 34 inside the interlocking groove 43 and fixing the first connecting plate 32 and the second connecting plate 41 by rotating the fixing nut 35, disassembly and assembly are convenient and the installation difficulty is reduced.

[0028] The first connecting plate 32 has a movable groove at its top, and a fixed protrusion 39 is movably sleeved inside the movable groove. A push rod 311 is fixedly installed at the bottom of the fixed protrusion 39. A movable cavity 310 is opened at the upper end of the first connecting plate 32. A moving block 312 is fixedly sleeved on the outer surface of the lower end of the push rod 311. The moving block 312 is movably sleeved inside the movable cavity 310. A return spring 313 is fixedly installed at both ends of the top of the moving block 312. The return spring 313 is located between the moving block 312 and the movable cavity 310. The push rod 311 is movably sleeved inside the fixed cavity 37 and the first connecting plate 32.

[0029] By setting the fixed protrusion 39 and the movable block 312, when a leak occurs in the first layer of seal, the water-swellable rubber ring 48 will expand when it comes into contact with the liquid medium. The expanded water-swellable rubber ring 48 pushes the top rod 311 to move outward, so that the fixed protrusion 39 moves to the top of the first connecting plate 32.

[0030] The operator can determine whether there will be a leak by observing the protrusion of the fixed protrusion 39 on the top of the first connecting plate 32.

[0031] The working process of this utility model is as follows:

[0032] During installation, align the position of the fixing seat 42 with the fixing block 33, so that the fixing screw 34 is engaged inside the interlocking groove 43, and rotate the fixing nut 35 to fix the first connecting plate 32 and the second connecting plate 41, so that the first limiting ring 49 engages the first sealing strip 410 inside the first sealing groove 36, the second limiting ring 44 engages the second sealing strip 45 inside the second sealing groove 38, and the water-swellable rubber ring 48 is located inside the fixing cavity 37.

[0033] When a leak occurs in the chemical process pump, specifically when a leak occurs between the first sealing strip 410 and the first sealing groove 36, the fluid medium will come into contact with the inside of the water-swellable rubber ring 48. At this time, the water-swellable rubber ring 48 will expand, causing it to adhere to the inside of the fixed cavity 37 and form a seal with the fixed cavity 37. Simultaneously, after the water-swellable rubber ring 48 expands, it will push the moving block 312 to move outward, and the push rod 311 will push the fixed protrusion 39 out of the inside of the first connecting plate 32. The operator can determine whether the sealing strip of the chemical process pump is leaking by observing the protrusion of the fixed protrusion 39.

[0034] Finally, it should be noted that: the accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0035] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A double-sealed chemical process pump comprising a fixed motor (1) and a pump head (2), characterized in that: The side of the fixed motor (1) is fixedly installed with a second connecting flange (4), and the side of the pump head (2) is fixedly installed with a first connecting flange (3). The first connecting flange (3) is connected to the second connecting flange (4). The second connecting flange (4) includes a second connecting plate (41). A plurality of fixing seats (42) are fixedly installed on the outer surface of the second connecting plate (41). An interlocking groove (43) is opened inside the fixing seat (42). A second limiting ring (44) is fixedly installed on the side of the second connecting plate (41). A second sealing strip (45) is embedded in the inside of the second limiting ring (44). A fixing tank (46) is fixedly installed on the side of the fixing seat (42). A fixing groove (47) is opened on the outer surface of the fixing tank (46). A water-swellable rubber ring (48) is fixedly sleeved on the outer surface of the fixing groove (47). A first limiting ring (49) is fixedly installed on the left side of the fixing tank (46). A first sealing strip (410) is embedded in the inside of the first limiting ring (49).

2. A double sealed chemical process pump as claimed in claim 1, wherein: The first connecting flange (3) includes a pump housing (31). A first connecting plate (32) is fixedly installed on the right side of the pump housing (31). A plurality of fixing blocks (33) are fixedly installed on the outer surface of the first connecting plate (32). A fixing screw (34) is rotatably installed on the outer surface of the fixing block (33). A fixing nut (35) is threaded on the outer surface of the fixing screw (34). A second sealing groove (38) is opened on the right side of the first connecting plate (32). A fixing cavity (37) and a first sealing groove (36) are opened on the right side of the first connecting plate (32).

3. A double sealed chemical process pump according to claim 2, characterized in that: The fixing screw (34) is sleeved and installed inside the interlocking groove (43) and fixedly connected by the fixing nut (35). The second sealing strip (45) is embedded and installed inside the second sealing groove (38). The water-swellable rubber ring (48) is located inside the fixing cavity (37). The first sealing strip (410) is embedded and installed inside the first sealing groove (36).

4. A double sealed chemical process pump according to claim 3, characterized in that: The first connecting plate (32) has a movable groove at its top, and a fixed protrusion (39) is movably sleeved inside the movable groove. A top rod (311) is fixedly installed at the bottom of the fixed protrusion (39). A movable cavity (310) is opened at the upper end of the first connecting plate (32). A movable block (312) is fixedly sleeved on the outer surface of the lower end of the top rod (311). The movable block (312) is movably sleeved inside the movable cavity (310). A return spring (313) is fixedly installed at both ends of the top of the movable block (312). The return spring (313) is located between the movable block (312) and the movable cavity (310). The top rod (311) is movably sleeved inside the fixed cavity (37) and the first connecting plate (32).

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