Corrugated pipe for mechanical seal

Abstract

The utility model relates to the technical field of corrugated pipes, in particular to a corrugated pipe for mechanical sealing, which comprises a corrugated pipe body, sealing rings are mounted at two ends of the corrugated pipe body, clamp plates are integrally connected onto the sealing rings, sleeves are mounted at two ends of the corrugated pipe body, and sealing plates extending to the sleeves are mounted on the corrugated pipe body. A clamping assembly used for clamping the clamping plate is installed on the sleeve, notches distributed in the circumferential direction are formed in the sealing plate, and a reinforcing rod extending to the corrugated pipe body is placed between every two corresponding notches. The corrugated pipe body is sealed through the sealing ring and the sleeve, the clamping hoop plate is pressed through the pressing plate, the clamping hoop plate and the sealing ring are rapidly positioned, and then the sealing ring assembling efficiency is improved; the notches distributed in the circumferential direction are formed in the sealing plate, the reinforcing rods can intercept and reinforce the outer wall of the corrugated pipe body after extending into the notches, and the service life of the corrugated pipe body is effectively prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of bellows, in particular to a bellows for mechanical sealing. Background Art

[0002] A bellows is a tubular elastic sensitive element made of foldable corrugated sheets connected along the folding and expansion direction. Its main purpose is to serve as a measuring element in a pressure measuring instrument to convert pressure into displacement or force.

[0003] Bellows are used in various corrosion-resistant pumps to act as mechanical seals. A sealing ring is installed in the bellows to seal it. Currently, the sealing ring needs to be maintained and replaced after a period of use. However, the current sealing ring is inconvenient to disassemble, which is not conducive to the later maintenance of the bellows. The bellows may flip and twist during operation, and the outer wall of the bellows is not clamped. This causes the bellows to expand due to the twisting, causing cracks in the bellows, thereby affecting the service life of the bellows. Utility Model Content

[0004] The utility model aims to solve the problem that it is inconvenient to replace the sealing ring on the bellows in the prior art, and proposes a bellows for mechanical sealing.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A bellows for mechanical sealing comprises a bellows body, sealing rings are installed on both ends of the bellows body, and a clamp plate is integrally connected to the sealing ring, sleeves are installed on both ends of the bellows body, a sealing plate extending to the sleeve is installed on the bellows body, a clamp assembly for clamping the clamp plate is installed on the sleeve, circumferentially distributed notches are provided on the sealing plate, and a reinforcement rod extending to the bellows body is placed between two corresponding notches.

[0007] Preferably, the sleeve is provided with a sealing plug extending into the bellows body, and the sealing plug is provided with a sealing gasket extending to the inner wall of the bellows body.

[0008] Preferably, the sleeve is an annular structure with an open side, and the sleeve is provided with a pressure sleeve extending to the sealing ring. The pressure sleeve is an annular structure, the sealing plate is vertically arranged on one side of the sleeve, and the sealing plate is threadedly connected to a locking bolt connected to the sleeve.

[0009] Preferably, the clamp assembly includes a deflection rod movably mounted on the sleeve, and a pressure plate extending to the clamp plate is movably mounted on the deflection rod, the deflection rod is movably mounted with a connecting rod extending into the sleeve, and a spring is welded between the deflection rod and the sleeve.

[0010] Preferably, the number of the deflection rods is four, and the two ends of the deflection rods are respectively connected to the sleeve and the pressure plate pin shaft, the end of the connecting rod away from the sleeve is connected to the middle end pin shaft of the deflection rod, the sleeve is provided with a positioning groove for guiding the connecting rod, the sleeve is provided with a guide groove connected to the positioning groove, and the pressure plate is an arc-shaped structure adapted to the clamp plate.

[0011] Preferably, the number of the reinforcement rods is six, and the reinforcement rods are arc-shaped structures adapted to the corrugated tube body, and magnetic plates with opposite poles attracting each other are provided on the recess and the reinforcement rods.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] 1. The utility model seals the bellows body through the sealing ring and the sleeve, and applies pressure to the clamp plate through the pressure plate, so as to quickly position the clamp plate and the sealing ring, thereby improving the efficiency of sealing ring assembly.

[0014] 2. The utility model provides circumferentially distributed notches on the sealing plate. After the reinforcement rods extend into the notches, they can intercept and reinforce the outer wall of the bellows body, effectively improving the service life of the bellows body. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic structural diagram of a bellows for mechanical sealing proposed in the present invention;

[0016] Figure 2 This is a cross-sectional view of a sleeve of a bellows for mechanical sealing proposed in the utility model;

[0017] Figure 3 This is a cross-sectional view of a bellows for mechanical sealing proposed in the utility model.

[0018] In the figure: 1. bellows body; 2. sealing ring; 3. clamp plate; 4. sleeve; 5. sealing plate; 6. sealing plug; 7. sealing gasket; 8. pressure sleeve; 9. deflection rod; 10. pressure plate; 11. connecting rod; 12. spring; 13. reinforcement rod. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] Reference Figure 1-Figure 3 A bellows for mechanical sealing includes a bellows body 1, sealing rings 2 are installed on both ends of the bellows body 1, and a clamp plate 3 is integrally connected to the sealing ring 2;

[0021] Sleeves 4 are installed on both ends of the bellows body 1. A sealing plate 5 extending to the sleeve 4 is installed on the bellows body 1. The sleeve 4 is provided with a sealing plug 6 extending into the bellows body 1, and the sealing plug 6 is provided with a sealing gasket 7 extending to the inner wall of the bellows body 1. By arranging the sealing plug 6 and the sealing gasket 7 extending into the bellows body 1 on the sleeve 4, the contact area with the bellows body 1 can be increased, thereby achieving effective sealing.

[0022] The sleeve 4 is an annular structure with one side open. A pressure sleeve 8 is provided on the sleeve 4 and extends to the sealing ring 2. The pressure sleeve 8 is an annular structure. The sealing plate 5 is vertically arranged on one side of the sleeve 4. A locking bolt connected to the sleeve 4 is threadedly connected on the sealing plate 5. When the sleeve 4 extends to the bellows body 1, it can drive the pressure sleeve 8 to cover the tail end of the sealing ring 2.

[0023] The sleeve 4 is provided with a clamp assembly for clamping the clamp plate 3;

[0024] The clamp assembly includes a deflection rod 9 movably mounted on the sleeve 4, and a pressure plate 10 extending to the clamp plate 3 is movably mounted on the deflection rod 9, a connecting rod 11 extending into the sleeve 4 is movably mounted on the deflection rod 9, and a spring 12 is welded between the deflection rod 9 and the sleeve 4;

[0025] The number of deflection rods 9 is four, and the two ends of the deflection rod 9 are respectively connected to the sleeve 4 and the pressure plate 10 by pins. The end of the connecting rod 11 away from the sleeve 4 is connected to the middle end of the deflection rod 9 by pins. The sleeve 4 is provided with a positioning groove for guiding the connecting rod 11. The sleeve 4 is provided with a guide groove connected to the positioning groove. The pressure plate 10 is an arc-shaped structure adapted to the clamp plate 3. By setting the pressure plate 10 as an arc-shaped structure that matches the clamp plate 3, the contact degree between the pressure plate 10 and the clamp plate 3 can be increased.

[0026] When the sealing ring 2 needs to be replaced, the sealing plate 5 is removed, and the connecting rod 11 is moved out of the guide groove through the guide groove. Under the action of the spring 12, the pressure plate 10 is disconnected from the clamp plate 3. The operator then extracts the sealing ring 2 through the opening of the sleeve 4, making it easier to remove the sealing ring 2.

[0027] The sealing plate 5 is provided with circumferentially distributed notches, and a reinforcement rod 13 extending to the bellows body 1 is placed between two corresponding notches;

[0028] The number of the reinforcing rods 13 is six, and the reinforcing rods 13 are arc-shaped structures adapted to the corrugated tube body 1, and magnetic plates with opposite poles attracting each other are provided on the notch and the reinforcing rods 13;

[0029] By setting the reinforcement rod 13 as an arc-shaped structure that matches the bellows body 1, the contact degree between the reinforcement rod 13 and the bellows body 1 can be increased. By arranging the reinforcement rod 13 extending to the bellows body 1 between the two sealing plates 5, the reinforcement rod 13 can reinforce and intercept the twisted bellows body 1, thereby effectively improving the service life of the bellows body 1.

[0030] The functional principle of this utility model can be explained through the following operation modes:

[0031] Install the sealing ring 2 at the end of the bellows body 1;

[0032] Sleeve the sealing plate 5 onto the bellows body 1 and extend the sleeve 4 to the end of the bellows body 1;

[0033] When the sleeve 4 extends onto the bellows body 1, the sleeve 4 drives the sealing plug 6 to extend into the bellows body 1, so that the sealing gasket 7 can fit with the inner wall of the bellows body 1;

[0034] The sleeve 4 drives the pressure sleeve 8 to extend onto the sealing ring 2, presses the sealing plate 5, and uses the locking bolt to connect the sealing plate 5 and the sleeve 4;

[0035] The connecting rod 11 is pulled through the guide groove. When the connecting rod 11 is subjected to force, it pulls the deflection rod 9. When the deflection rod 9 is subjected to force, it deflects with the pin point as the fulcrum, so that the deflection rod 9 drives the pressure plate 10 to extend onto the clamp plate 3. When one end of the connecting rod 11 extends into the positioning groove, the position of the pressure plate 10 is locked.

[0036] The reinforcing rod 13 is pressed into the two corresponding notches, and the reinforcing rod 13 is connected to the sealing plate 5 through the magnetic plates with opposite poles attracting each other.

[0037] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A bellows for mechanical sealing, comprising a bellows body (1), characterized in that: Sealing rings (2) are installed on both ends of the bellows body (1), and a clamp plate (3) is integrally connected to the sealing ring (2). Sleeves (4) are installed on both ends of the bellows body (1). A sealing plate (5) extending to the sleeve (4) is installed on the bellows body (1). A clamp assembly for clamping the clamp plate (3) is installed on the sleeve (4). The sealing plate (5) is provided with circumferentially distributed notches, and a reinforcing rod (13) extending to the bellows body (1) is placed between two corresponding notches.

2. The bellows for mechanical sealing according to claim 1, characterized in that: The sleeve (4) is provided with a sealing plug (6) extending into the bellows body (1), and the sealing plug (6) is provided with a sealing gasket (7) extending onto the inner wall of the bellows body (1).

3. The bellows for mechanical sealing according to claim 1, characterized in that: The sleeve (4) is an annular structure with an opening on one side. The sleeve (4) is provided with a pressure sleeve (8) extending to the sealing ring (2). The pressure sleeve (8) is an annular structure. The sealing plate (5) is vertically arranged at a position on one side of the sleeve (4), and a locking bolt connected to the sleeve (4) is threadedly connected on the sealing plate (5).

4. The bellows for mechanical sealing according to claim 1, characterized in that: The clamp assembly includes a deflection rod (9) movably mounted on the sleeve (4), and a pressure plate (10) extending to the clamp plate (3) is movably mounted on the deflection rod (9), a connecting rod (11) extending into the sleeve (4) is movably mounted on the deflection rod (9), and a spring (12) is welded between the deflection rod (9) and the sleeve (4).

5. The bellows for mechanical sealing according to claim 4, characterized in that: The number of the deflection rods (9) is four, and the two ends of the deflection rod (9) are respectively connected to the sleeve (4) and the pressure plate (10) by pins, and the end of the connecting rod (11) away from the sleeve (4) is connected to the middle end pin of the deflection rod (9), and the sleeve (4) is provided with a positioning groove for guiding the connecting rod (11), and the sleeve (4) is provided with a guide groove connected to the positioning groove, and the pressure plate (10) is an arc-shaped structure adapted to the clamp plate (3).

6. The bellows for mechanical sealing according to claim 1, characterized in that: The number of the reinforcement rods (13) is six, and the reinforcement rods (13) are arc-shaped structures adapted to the corrugated tube body (1), and magnetic plates with opposite poles attracting each other are provided on the recess and the reinforcement rods (13).

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