Novel screw pump mechanical sealing device

Abstract

The utility model relates to the technical field of screw pump sealing, and discloses a novel screw pump mechanical sealing device which is characterized in that a first sealing sleeve and a second sealing sleeve are respectively arranged at the external joint of a connecting pipe and a pipe body from top to bottom, and a connecting mechanism is arranged at the joint of the first sealing sleeve and the second sealing sleeve; the connecting mechanism comprises a first connecting plate installed on the lower surface of the first sealing sleeve through screws and further comprises a second connecting plate installed on the upper surface of the second sealing sleeve through screws, a groove is formed in the upper surface of the second connecting plate, and electric telescopic rods are symmetrically arranged in the groove. And sealing plates are clamped on the inner sides of the first sealing sleeve and the second sealing sleeve outside the pipe body. Through work of the electric telescopic rod in the connecting mechanism, the first connecting plate can move towards the position of the second connecting plate, and then the pipe body and the connecting pipe can be in mechanical sealing connection through the first sealing sleeve and the second sealing sleeve.

Description

Technical Field

[0001] The utility model relates to the technical field of screw pump seals, in particular to a novel screw pump mechanical seal device. Background Art

[0002] Screw pump, also known as "spiral water pump" or "Archimedes screw pump", is a pump that uses the rotation of spiral blades to make water rise in an axial spiral shape. It is mainly composed of a shaft, spiral blades, and a casing. The characteristics of a screw pump are stable flow, small pressure pulsation, self-priming ability, low noise, high efficiency, long life, and reliable operation. When the screw pump transports the medium, in order to prevent the medium from leaking, a sealing device needs to be added to the output end of the screw pump.

[0003] A Chinese patent discloses a mechanical sealing device for a screw pump (Announcement No. CN213392654U). The patented technology arranges an electric push rod, a first slider and a transmission circular gear, so that the rotating shaft can drive the first transmission rod to rotate more stably and conveniently, so that the second transmission rod can conveniently and effectively drive the first circular shaft and the second slider to move along the track of the second slide rail, so that the limit block can tighten the limit shaft more conveniently and stably, and the first clamping plate and the second clamping plate can seal the pump body and the pipe body more firmly and conveniently, greatly improving the sealing of the pump body and the pipe body.

[0004] However, there are still some shortcomings in this patent. Although the patent can seal the pump body and the pipe body through the first clamping plate and the second clamping plate, it can be seen from the drawings of the patent that the patent requires multiple structures to cooperate in order to seal when in use. This method has a complex structure and will affect the sealing efficiency of the pipe body. Therefore, those skilled in the art provide a new screw pump mechanical sealing device to solve the problems raised in the above background technology. Utility Model Content

[0005] The purpose of the utility model is to provide a novel mechanical seal device for a screw pump to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A novel mechanical sealing device for a screw pump comprises a pump body, a connecting pipe arranged on one side of the pump body, and a tube body installed at one end of the connecting pipe, wherein the external connection between the connecting pipe and the tube body is respectively provided with a first sealing sleeve and a second sealing sleeve from top to bottom, and a connecting mechanism is provided at the connection between the first sealing sleeve and the second sealing sleeve, wherein the connecting mechanism comprises a first connecting plate installed on the lower surface of the first sealing sleeve by screws, and also comprises a second connecting plate installed on the upper surface of the second sealing sleeve by screws, wherein a groove is provided on the upper surface of the second connecting plate, and electric telescopic rods are symmetrically provided inside the groove; the inner sides of the first sealing sleeve and the second sealing sleeve are both clamped with sealing plates on the outside of the tube body, and a first sealing gasket is provided on the inner side of the sealing plate.

[0008] As a further solution of the utility model: two electric telescopic rods are symmetrically arranged inside the groove, and the telescopic ends of the electric telescopic rods are installed on the lower surface of the first connecting plate.

[0009] As a further solution of the present invention: a second sealing gasket is disposed on the lower surface of the first connecting plate and the upper surface of the second connecting plate, and the material of the second sealing gasket is rubber.

[0010] As a further solution of the present invention: the first connecting plate is the same length as the second connecting plate, and the second sealing gasket is the same length as the second connecting plate.

[0011] As a further solution of the utility model: positioning pins are symmetrically arranged on the lower surface of the sealing plate near the second sealing sleeve, and positioning holes that engage with the positioning pins are opened on the inner side of the second sealing sleeve.

[0012] As a further solution of the utility model: the positioning pin is cylindrical, and two positioning pins are symmetrically arranged on the lower surface of the sealing plate.

[0013] As a further solution of the present invention: the sealing plate and the first sealing gasket have the same circle center, and the first sealing gasket is made of rubber.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. A novel mechanical sealing device for a screw pump, through the setting of a connecting mechanism, after the first sealing sleeve and the second sealing sleeve connect the connecting pipe and the pipe body, the operation of the electric telescopic rod inside the groove will cause the first connecting plate to move toward the position of the second connecting plate, so that the first sealing sleeve and the second sealing sleeve can mechanically seal the pipe body and the connecting pipe, and at the same time, the sealing performance of the connection can be improved by the first sealing gasket. The setting structure is simple, and the purpose of efficient sealing between the pipe body and the connecting pipe of the screw pump body can be achieved. It is easy to install and disassemble, and its sealing efficiency is effectively improved.

[0016] 2. A novel mechanical sealing device for a screw pump has a sealing plate clamped on the inner sides of a first sealing sleeve and a second sealing sleeve, that is, a locating pin is embedded in the inside of a locating hole, so that the sealing plate can be installed. At the same time, the first sealing gasket on the inner side of the sealing plate can improve the sealing performance, thereby ensuring the normal operation of the screw pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural schematic diagram of a new type of mechanical seal device for a screw pump;

[0018] Figure 2 It is a structural schematic diagram of a connection mechanism in a new type of screw pump mechanical seal device;

[0019] Figure 3 It is a structural schematic diagram of the second sealing gasket in a novel mechanical sealing device of a screw pump;

[0020] Figure 4 This is a structural schematic diagram of a sealing plate in a new type of screw pump mechanical seal device.

[0021] In the figure: 1. pump body; 11. connecting pipe; 2. pipe body; 3. first sealing sleeve; 4. second sealing sleeve; 5. sealing plate; 51. first sealing gasket; 52. positioning pin; 53. positioning hole; 6. connecting mechanism; 61. first connecting plate; 62. second connecting plate; 63. second sealing gasket; 64. groove; 641. electric telescopic rod. DETAILED DESCRIPTION

[0022] See also Figures 1 to 4 In the embodiment of the utility model, a novel mechanical sealing device for a screw pump includes a pump body 1, a connecting pipe 11 arranged on one side of the pump body 1, and a pipe body 2 installed at one end of the connecting pipe 11. The external connection between the connecting pipe 11 and the pipe body 2 is respectively provided with a first sealing sleeve 3 and a second sealing sleeve 4 from top to bottom. The connection between the first sealing sleeve 3 and the second sealing sleeve 4 is provided with a connecting mechanism 6. The connecting mechanism 6 includes a first connecting plate 61 installed on the lower surface of the first sealing sleeve 3 by screws, and also includes a second connecting plate 62 installed on the upper surface of the second sealing sleeve 4 by screws. A groove 64 is provided on the upper surface of the second connecting plate 62, and an electric telescopic rod 641 is symmetrically arranged inside the groove 64; the inner sides of the first sealing sleeve 3 and the second sealing sleeve 4 are both clamped with a sealing plate 5 on the outside of the tube body 2, and a first sealing gasket 51 is arranged on the inner side of the sealing plate 5. This arrangement utilizes the connecting mechanism 6 to reduce the distance between the first sealing sleeve 3 and the second sealing sleeve 4, thereby achieving the purpose of quickly connecting the connecting pipe 11 of the pump body 1 to the tube body 2 in a sealed connection. At the same time, the sealing plate 5 can improve the sealing of the connection between the connecting pipe 11 and the tube body 2.

[0023] exist Figure 2 and Figure 3 Middle: Two electric telescopic rods 641 are symmetrically arranged inside the groove 64, and the telescopic ends of the electric telescopic rods 641 are installed on the lower surface of the first connecting plate 61. This arrangement uses the electric telescopic rods 641 to move the first connecting plate 61 toward the position of the second connecting plate 62, thereby reducing the distance between the first sealing sleeve 3 and the second sealing sleeve 4 to achieve the purpose of automatically sealing the tube body 2 and the connecting pipe 11.

[0024] exist Figure 3 Middle: The lower surface of the first connecting plate 61 and the upper surface of the second connecting plate 62 are both provided with a second sealing gasket 63, the material of the second sealing gasket 63 is rubber, the first connecting plate 61 and the second connecting plate 62 have the same length, and the length of the second sealing gasket 63 is the same as the length of the second connecting plate 62. This arrangement utilizes the second sealing gasket 63 to improve the sealing of the connection between the first connecting plate 61 and the second connecting plate 62.

[0025] exist Figure 4 Middle: The lower surface of the sealing plate 5 is symmetrically provided with positioning pins 52 near the second sealing sleeve 4, and the inner side of the second sealing sleeve 4 is provided with positioning holes 53 that engage with the positioning pins 52. The positioning pins 52 are cylindrical, and two positioning pins 52 are symmetrically provided on the lower surface of the sealing plate 5. This arrangement utilizes the positioning pins 52 to be embedded in the interior of the positioning holes 53, so that the sealing plate 5 can be positioned and installed.

[0026] exist Figure 4 Middle: The sealing plate 5 and the first sealing gasket 51 have the same center. The first sealing gasket 51 is made of rubber. This arrangement using the first sealing gasket 51 can improve the sealing performance of the connection between the pump body 1 connecting pipe 11 and the pipe body 2.

[0027] The working principle of the utility model is as follows: when the new screw pump mechanical seal device of the utility model is used, the pipe body 2 is first connected to the connecting pipe 11 of the pump body 1, and the connection can be made by bolts or clamping. After the connection, the first connecting plate 61 in the connecting mechanism 6 is installed on the lower surface of the first sealing sleeve 3 by screws, and the second connecting plate 62 is installed on the upper surface of the second sealing sleeve 4 by screws. After the installation, the first sealing sleeve 3 and the second sealing sleeve 4 are installed to the connection between the connecting pipe 11 and the outside of the pipe body 2. At this time, the electric telescopic rod 641 in the groove 64 is started to work, which will make the first connecting plate 61 move toward the second connecting plate 62. The position of the connecting plate 62 is moved and fitted, so that the first sealing sleeve 3 and the second sealing sleeve 4 can be used to connect and seal the tube body 2 and the connecting pipe 11. At the same time, the second sealing gasket 63 can be used to improve the sealing performance of the connection between the first connecting plate 61 and the second connecting plate 62. A sealing plate 5 is provided on the inner side of the first sealing sleeve 3 and the second sealing sleeve 4. When installing the sealing plate 5, it only needs to embed the locating pin 52 into the inside of the locating hole 53 to achieve its installation purpose. The first sealing gasket 51 on the inner side of the sealing plate 5 can improve the sealing performance of the connection between the tube body 2 and the connecting pipe 11 of the pump body 1, thereby ensuring the normal operation of the screw pump.

[0028] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A novel mechanical seal device for a screw pump, comprising a pump body (1), a connecting pipe (11) arranged on one side of the pump body (1), and a pipe body (2) installed at one end of the connecting pipe (11), characterized in that: A first sealing sleeve (3) and a second sealing sleeve (4) are respectively provided at the external connection between the connecting pipe (11) and the tube body (2) from top to bottom. A connecting mechanism (6) is provided at the connection between the first sealing sleeve (3) and the second sealing sleeve (4). The connecting mechanism (6) comprises a first connecting plate (61) mounted on the lower surface of the first sealing sleeve (3) by screws, and a second connecting plate (62) mounted on the upper surface of the second sealing sleeve (4) by screws. A groove (64) is provided on the upper surface of the second connecting plate (62), and an electric telescopic rod (641) is symmetrically provided inside the groove (64). The inner sides of the first sealing sleeve (3) and the second sealing sleeve (4) are both clamped with sealing plates (5) on the outside of the tube body (2), and a first sealing pad (51) is provided on the inner side of the sealing plate (5).

2. A novel screw pump mechanical seal device according to claim 1, characterized in that: Two electric telescopic rods (641) are symmetrically arranged inside the groove (64), and the telescopic ends of the electric telescopic rods (641) are mounted on the lower surface of the first connecting plate (61).

3. A novel screw pump mechanical seal device according to claim 1, characterized in that: A second sealing gasket (63) is provided on the lower surface of the first connecting plate (61) and the upper surface of the second connecting plate (62), and the material of the second sealing gasket (63) is rubber.

4. A novel screw pump mechanical seal device according to claim 3, characterized in that: The first connecting plate (61) and the second connecting plate (62) have the same length, and the second sealing gasket (63) has the same length as the second connecting plate (62).

5. A novel screw pump mechanical seal device according to claim 1, characterized in that: Positioning pins (52) are symmetrically arranged on the lower surface of the sealing plate (5) near the second sealing sleeve (4), and a positioning hole (53) engaged with the positioning pin (52) is provided on the inner side of the second sealing sleeve (4).

6. A novel mechanical seal device for a screw pump according to claim 5, characterized in that: The positioning pin (52) is cylindrical, and two positioning pins (52) are symmetrically arranged on the lower surface of the sealing plate (5).

7. A novel mechanical seal device for a screw pump according to claim 1, characterized in that: The sealing plate (5) and the first sealing gasket (51) have the same circle center, and the first sealing gasket (51) is made of rubber.

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