Packing sealing structure of centrifugal pump

Abstract

The utility model discloses a centrifugal pump packing seal structure, and relates to the technical field of centrifugal pumps. The centrifugal pump comprises a centrifugal pump body, a mounting frame is fixedly connected to the outer surface of the centrifugal pump body, a cooling device is arranged at the top of the mounting frame, a sealing device is arranged in an inner cavity of the centrifugal pump body, and the cooling device comprises a cooling pipe arranged on the wall of the inner cavity of the centrifugal pump body. According to the cooling device, cooling liquid can be continuously conveyed to the cooling pipe in the operation process of the centrifugal pump body, heat generated at the position of the filler is conducted outwards through cold and heat exchange between the cooling liquid in the cooling pipe and heat generated by the centrifugal pump body, and therefore the temperature at the position of the filler is stabilized, and the service life of the centrifugal pump is prolonged. According to the centrifugal pump, the sealing element is prevented from being damaged due to continuous high temperature, so that the service life of the sealing device is prolonged, and the sealing effect of the centrifugal pump body can be effectively improved through the sealing device and the matched use of the dynamic seal and the packing seal.

Description

TECHNICAL FIELD

[0001] The utility model belongs to centrifugal pump technical field, especially, relate to a centrifugal pump packing seal structure. BACKGROUND

[0002] Centrifugal pump is according to centrifugal force principle design, high-speed rotating impeller blade drives water rotation, and water is thrown out, to reach the purpose of delivery, centrifugal pump has many kinds, from use can be divided into civil and industrial pump, from the medium conveying can be divided into clean water pump, impurity pump, corrosion-resistant pump etc., horizontal centrifugal pump is a common centrifugal pump type, its characteristic is that main shaft is horizontally arranged, and inlet and outlet are all in the same direction, horizontal centrifugal pump is composed of pump body, impeller, shaft, bearing, sealing element and other components, and the main components such as pump body, impeller, shaft and bearing are located inside the pump body.

[0003] The horizontal centrifugal pump in the prior art generally adopts power sealing or packing sealing to seal, and the above sealing mode is prone to poor sealing effect, resulting in liquid leakage, and the packing sealing is prone to high temperature during use of the centrifugal pump, resulting in damage of sealing parts, thereby causing sealing failure.

[0004] Therefore, the centrifugal pump packing seal structure is provided to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model discloses a centrifugal pump packing seal structure, and through the cooperation of the cooling device and the sealing device, the problem of single sealing mode in the prior art leading to sealing failure and liquid leakage is solved.

[0006] To solve the above technical problems, the utility model is realized through the following technical schemes.

[0007] The utility model discloses a centrifugal pump packing seal structure, including centrifugal pump body, the outer surface of centrifugal pump body is fixedly connected with the installation frame, the top of installation frame is provided with cooling device, the inner chamber of centrifugal pump body is provided with sealing device, cooling device includes the cooling pipe of setting in the inner chamber wall of centrifugal pump body, the top of installation frame is fixedly connected with cooling tank, the inner chamber of cooling tank is provided with the delivery pump, the output of delivery pump is connected with the delivery pipe, one end of cooling pipe is connected with the circulating pipe, the other end of cooling pipe is connected with liquid inlet pipe, sealing device includes the water seal ring of setting in the inner chamber of centrifugal pump body, the inner chamber of water seal ring is provided with spring, the other end of spring is fixedly connected with sealing ring, one side of sealing ring is provided with the close ring, one side of close ring is provided with the filling material, one side of filling material is provided with the sealing cover.

[0008] The utility model further sets up, the top of cooling box is connected with the supplementary pipe, the top of supplementary pipe is connected with the pipe cover.

[0009] The utility model further sets up, one side wall of cooling box inner chamber is provided with liquid level sensor, the bottom of cooling box inner chamber is provided with temperature sensor.

[0010] The utility model further sets up, the one end of liquid inlet pipe away from cooling pipe and the one end of circulating pipe away from cooling pipe all are connected with the connecting joint, the connecting joint of conveying pipe and top is connected, the connecting joint of bottom is connected with the backflow pipe, and the other end of backflow pipe is connected with cooling box.

[0011] The utility model further sets up, the inner chamber wall of centrifugal pump body is provided with the limit recess, the top and bottom of sealing ring all are fixedly connected with the limit board.

[0012] The utility model further sets up, the inner chamber of water seal ring and sealing ring all are provided with the placing recess that is suitable for spring, one side of water seal ring is fixedly connected with the sealing pad.

[0013] The utility model further sets up, the number of filling material is five, and the shape of filling material is semicircle ring.

[0014] The utility model further sets up, the inner chamber of sealing ring is provided with the sealing recess, and the inner chamber of sealing recess is fixedly connected with rubber ring, the one side of tight ring close to sealing ring is fixedly connected with tight block, and rubber ring and tight block are interference fit.

[0015] The utility model has the following beneficial effects.

[0016] 1, the utility model discloses a cooling device can be transported to cooling pipe in the centrifugal pump body operation process, and the heat generated by the centrifugal pump body in cooling liquid in cooling pipe produces cold and hot exchange, and the heat generated in the position of filling material is conducted outward, thereby stabilizing the temperature at the filling material, avoiding the damage of sealing element caused by continuous high temperature, thereby prolonging the service life of the sealing device, the utility model discloses a sealing device, which is used in cooperation with the power sealing and the packing sealing, can effectively improve the sealing effect of the centrifugal pump body. ACCURACY OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the following will be briefly introduced to the drawing needed to be used in the embodiment.

[0018] Figure 1 It is a kind of centrifugal pump packing sealing structure's perspective view.

[0019] Figure 2It is a sectional view of shaft sleeve in centrifugal pump body in packing seal structure of centrifugal pump.

[0020] Figure 3 It is a sectional view of cooling box in packing seal structure of centrifugal pump.

[0021] Figure 4 It is a sectional view of sealing ring and tight ring in packing seal structure of centrifugal pump.

[0022] Figure 5 It is a sectional view of sealing ring and tight ring in packing seal structure of centrifugal pump. Figure 2 It is an enlarged view of A in the middle.

[0023] In the drawing: 1, centrifugal pump body; 2, mounting frame; 3, cooling device; 31, cooling pipe; 32, cooling box; 33, delivery pump; 34, delivery pipe; 35, circulating pipe; 36, liquid inlet pipe; 4, sealing device; 41, water seal ring; 42, spring; 43, sealing ring; 44, tight ring; 45, filler; 46, sealing cover; 5, supplementary pipe; 6, liquid level sensor; 7, temperature sensor; 8, connecting joint; 9, limiting plate; 10, sealing gasket; 11, rubber ring; 12, tight block. DETAILED DESCRIPTION

[0024] The technical scheme in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. The described embodiments are only some of the embodiments of the present application, not all the embodiments. EMBODIMENT

[0025] Please refer to Figures 1-5 The present application is a packing seal structure of centrifugal pump, which comprises a centrifugal pump body 1, a mounting frame 2 fixedly connected to the outer surface of the centrifugal pump body 1, a cooling device 3 arranged on the top of the mounting frame 2, a sealing device 4 arranged in the inner cavity of the centrifugal pump body 1, the cooling device 3 comprising a cooling pipe 31 arranged on the inner cavity wall of the centrifugal pump body 1, the mounting frame 2 being fixedly connected with a cooling box 32 on the top thereof, the inner cavity of the cooling box 32 being provided with a delivery pump 33, the output end of the delivery pump 33 being communicated with a delivery pipe 34, one end of the cooling pipe 31 being communicated with a circulating pipe 35, the other end of the cooling pipe 31 being communicated with a liquid inlet pipe 36, the sealing device 4 comprising a water seal ring 41 arranged in the inner cavity of the centrifugal pump body 1, the inner cavity of the water seal ring 41 being provided with a spring 42, the other end of the spring 42 being fixedly connected with a sealing ring 43, one side of the sealing ring 43 being provided with a tight ring 44, one side of the tight ring 44 being provided with a filler 45, and one side of the filler 45 being provided with a sealing cover 46.

[0026] Specifically, the centrifugal pump body 1 is sealed by two sealing methods through the water seal ring 41 and the filler 45, so that when a single sealing element is damaged, i.e. liquid leakage occurs, the sealing effect of the centrifugal pump body 1 is improved through double sealing, and through the cooling device 3, the temperature at the position of the sealing device 4 can be continuously reduced during use of the centrifugal pump body 1, thereby prolonging the service life of the sealing device 4 element. Embodiment

[0027] Please refer to Figures 1-5 On the basis of embodiment one, the top of the cooling box 32 is communicated with a supplement pipe 5, the top of the supplement pipe 5 is communicated with a pipe cover, a liquid level sensor 6 is arranged on one side wall of the inner cavity of the cooling box 32, a temperature sensor 7 is arranged at the bottom of the inner cavity of the cooling box 32, the end of the liquid inlet pipe 36 away from the cooling pipe 31 and the end of the circulating pipe 35 away from the cooling pipe 31 are both communicated with a connecting joint 8, the conveying pipe 34 is communicated with the connecting joint 8 at the top, the connecting joint 8 at the bottom is communicated with a backflow pipe, the other end of the backflow pipe is communicated with the cooling box 32, a limiting groove is arranged on the inner cavity wall of the centrifugal pump body 1, limiting plates 9 are fixedly connected to the top and the bottom of the sealing ring 43, placing grooves adapted to the springs 42 are arranged in the inner cavities of the water seal ring 41 and the sealing ring 43, sealing gaskets 10 are fixedly connected to one side of the water seal ring 41, the number of the fillers 45 is five, the shape of the fillers 45 is semicircular ring, a sealing groove is arranged in the inner cavity of the sealing ring 43, rubber rings 11 are fixedly connected in the inner cavity of the sealing groove, tight blocks 12 are fixedly connected to one side of the tight ring 44 close to the sealing ring 43, the rubber ring 11 and the tight block 12 are in interference fit.

[0028] Specifically, the supplement pipe 5 is arranged to facilitate the supplement of cooling liquid, the liquid level sensor 6 is arranged to detect the liquid level in the cooling box 32, the temperature sensor 7 is arranged to detect the temperature of the cooling liquid in the cooling box 32, the connecting joint 8 is arranged to facilitate the connection of the conveying pipe 34 and the circulating pipe 35, the limiting plate 9 is arranged to limit the position of the sealing ring 43, the sealing gasket 10 made of metal is arranged to support the shape of the water seal ring 41 to prevent the water seal ring 41 from deforming, and the rubber ring 11 and the tight block 12 are arranged to increase the sealing effect of the sealing ring 43.

[0029] The working principle of the utility model is: water seal ring 41 is inserted into the shaft sleeve of centrifugal pump body 1, then tight ring 44 is repeatedly inserted into the shaft sleeve, tight ring 44 is continuously pushed, the tight block 12 on tight ring 44 is inserted into the sealing groove of sealing ring 43, tight block 12 is interference fit with rubber ring 11, then filling material 45 is sequentially put in, and filling material 45 is continuously pushed, so that filling material 45 enters the inner cavity of the shaft sleeve, the filling material continuously extrudes spring 42 during the filling process, spring 42 is retracted, and limiting plate 9 is continuously pushed to move, when limiting plate 9 enters the limiting groove of centrifugal pump body 1, sealing cover 46 is fixed on one side of the shaft sleeve through bolts, then mounting frame 2 is fixed on the surface of centrifugal pump body 1, at this time, conveying pipe 34 is communicated with the connecting joint 8 at the top, the return pipe is communicated with the connecting joint 8 at the bottom, conveying pump 33 continuously conveys the cooling liquid to cooling pipe 31 through conveying pipe 34 during the use of centrifugal pump body 1, cooling pipe 31 exchanges heat with the heat in the shaft sleeve, avoids that the heat accumulation causes the sealing element of sealing device 4 to be damaged, improves the service life of sealing device 4, and reduces the risk of liquid leakage.

[0030] The above disclosed preferred embodiments of the utility model are only used for helping to set forth the utility model, the preferred embodiments do not describe all the details, and also do not limit the utility model to only the specific implementation mode, the description selects and specifically describes these embodiments, is in order to better explain the principle and practical application of the utility model, so that the person skilled in the art can well understand and utilize the utility model.

Claims

1. A centrifugal pump packing seal structure comprising a centrifugal pump body (1), characterized in that: The outer surface of the centrifugal pump body (1) is fixedly connected with a mounting frame (2), the top of the mounting frame (2) is provided with a cooling device (3), and the inner cavity of the centrifugal pump body (1) is provided with a sealing device (4); The cooling device (3) comprises a cooling pipe (31) arranged on the inner cavity wall of the centrifugal pump body (1), the top of the mounting frame (2) is fixedly connected with a cooling box (32), the inner cavity of the cooling box (32) is provided with a delivery pump (33), the output end of the delivery pump (33) is communicated with a delivery pipe (34), one end of the cooling pipe (31) is communicated with a circulating pipe (35), and the other end of the cooling pipe (31) is communicated with a liquid inlet pipe (36). The sealing device (4) comprises a water seal ring (41) arranged in the inner cavity of the centrifugal pump body (1), the inner cavity of the water seal ring (41) is provided with a spring (42), the other end of the spring (42) is fixedly connected with a sealing ring (43), one side of the sealing ring (43) is provided with a tight ring (44), one side of the tight ring (44) is provided with a filler (45), and one side of the filler (45) is provided with a sealing cover (46).

2. A centrifugal pump packing seal structure as defined in claim 1 wherein: The top of the cooling box (32) is communicated with a supplement pipe (5), and the top of the supplement pipe (5) is communicated with a pipe cover.

3. A centrifugal pump packing seal structure as defined in claim 1 wherein: One side wall of the inner cavity of the cooling box (32) is provided with a liquid level sensor (6), and the bottom of the inner cavity of the cooling box (32) is provided with a temperature sensor (7).

4. A centrifugal pump packing seal structure as defined in claim 1 wherein: The end of the liquid inlet pipe (36) away from the cooling pipe (31) and the end of the circulating pipe (35) away from the cooling pipe (31) are both communicated with a connecting joint (8), the connecting joint (8) at the top is communicated with the delivery pipe (34), the connecting joint (8) at the bottom is communicated with a return pipe, and the other end of the return pipe is communicated with the cooling box (32).

5. A centrifugal pump packing seal structure as defined in claim 1 wherein: The inner cavity wall of the centrifugal pump body (1) is provided with a limiting groove, and the top and the bottom of the sealing ring (43) are both fixedly connected with a limiting plate (9).

6. A centrifugal pump packing seal structure as defined in claim 1 wherein: The inner cavities of the water seal ring (41) and the sealing ring (43) are both provided with a placing groove matched with the spring (42), and one side of the water seal ring (41) is fixedly connected with a sealing gasket (10).

7. A centrifugal pump packing seal structure as defined in claim 1 wherein: The number of the fillers (45) is five, and the shape of the fillers (45) is semicircular ring.

8. A centrifugal pump packing seal structure as defined in claim 1 wherein: The inner cavity of the sealing ring (43) is provided with a sealing groove, the inner cavity of the sealing groove is fixedly connected with a rubber ring (11), one side of the tight ring (44) close to the sealing ring (43) is fixedly connected with a tight block (12), and the rubber ring (11) and the tight block (12) are in interference fit.

Images