Diaphragm chamber gland capable of prolonging service life of diaphragm

Abstract

The utility model discloses a diaphragm chamber gland capable of prolonging the service life of a diaphragm in the field of diaphragm pumps, the diaphragm chamber gland comprises a bottom plate and an annular diaphragm chamber which are integrally formed, a feeding port is formed in the side wall of the diaphragm chamber, and a discharging port is formed in the side, opposite to the feeding port, of the diaphragm chamber. A pressing ring is fixedly connected to the end, away from the bottom plate, of the diaphragm chamber, the outer wall of the pressing ring is flush with the outer wall of the diaphragm chamber, the inner wall of the pressing ring is eccentric towards the side provided with the discharging port, an eccentric circular groove is formed in the end, away from the diaphragm chamber, of the pressing ring, and the eccentric circular groove inclines downwards from the outer side to the inner side. And the eccentric circular groove is eccentric towards one side provided with the discharge hole. The contact position of the improved diaphragm chamber gland and the diaphragm is an obtuse angle, so that the phenomena of over-compression and over-shearing during the movement of the diaphragm are avoided, the production efficiency of aluminum oxide is improved, the time for stopping production and maintaining is reduced, and the economic benefit of a company is improved.

Description

Technical Field

[0001] The utility model belongs to the field of diaphragm pumps, and particularly relates to a diaphragm chamber gland capable of extending the service life of a diaphragm. Background Art

[0002] The diaphragm pump is an important equipment in the alumina dissolution process. Its working principle is that the motor drives the crankshaft, connecting rod, and crosshead through the reducer to convert the rotary motion into linear motion, driving the piston to reciprocate. When the piston moves to the left, the piston drives the hydraulic oil to pull the rubber diaphragm in the diaphragm chamber away from the diaphragm chamber gland, so that the volume of the diaphragm chamber working chamber increases, and at the same time the discharge valve is closed, and the slurry to be transported opens the feed valve with the help of the feeding pressure, enters and fills the diaphragm chamber. When the piston moves in the direction close to the diaphragm chamber gland, the feed valve is closed, and the piston pushes the hydraulic oil to push the rubber diaphragm in the diaphragm chamber toward the diaphragm chamber gland, and opens the discharge valve with the help of pressure to transport the slurry to the pipeline.

[0003] The existing diaphragm pump (2) usually uses the Wirth brand diaphragm pump (2) imported from Germany. However, most of the consumable parts of the existing diaphragm pump (2) have serious discrepancies between the actual service life and the estimated service life due to design concepts and production processes during the localization process, with the diaphragm (3) being the most serious. The original diaphragm pump gland (4) includes an integrally formed bottom plate and an annular diaphragm chamber, the top of the diaphragm chamber is fixedly connected with the original clamping ring (41), the original clamping ring (41) is formed by two circular rings, one large and one small, with a square cross section, fixedly connected, and the smaller circular ring is fixedly connected to the top of the larger circular ring; the diaphragm chamber end face (42) of the original diaphragm pump gland (4) is slightly concave downward. When the diaphragm pump (2) is in use, the clamping ring (41) of the original diaphragm chamber gland (4) bulges outwards. When the diaphragm (3) reciprocates, the diaphragm (3) is easy to cut into the original clamping ring (41) of the original diaphragm chamber gland (4), resulting in "over-compression" and "diaphragm cutting" phenomena, causing the diaphragm (3) to be partially and prematurely damaged and irreversible. In long-term use, it is very easy to break at this point, and the material flows into the diaphragm chamber and flows outward under the pressure of the diaphragm. The end face of the diaphragm chamber that is concave downward is easy to cause the material to accumulate here, and it is not easy to be squeezed out of the diaphragm chamber by the diaphragm, resulting in waste. The normal service life of the original diaphragm is about 8,000 hours, but after localization, when the diaphragm pump (2) and the original diaphragm chamber gland (4) are matched for use, the service life is usually not more than 4,000 hours. Because the diaphragm pump (2) is the heart of the alumina production process, the rupture of the diaphragm will cause the entire alumina production line to stop for maintenance, seriously affecting the production and operation of alumina, resulting in a reduction or suspension of alumina production, causing great economic losses to the company. Utility Model Content

[0004] The utility model aims to provide a diaphragm chamber gland which can prolong the service life of a diaphragm, so as to solve the problem that the service life of the existing domestically produced diaphragm is reduced after being matched with the original diaphragm pump.

[0005] A diaphragm chamber pressure cover for extending the service life of the diaphragm in the present solution comprises an integrally formed bottom plate and an annular diaphragm chamber, a side wall of the diaphragm chamber is provided with a feed port, a side of the diaphragm chamber opposite to the feed port is provided with a discharge port, an end of the diaphragm chamber away from the bottom plate is fixedly connected with a clamping ring, an outer wall of the clamping ring is flush with the outer wall of the diaphragm chamber, an inner wall of the clamping ring is eccentric to the side with the discharge port, an end of the clamping ring away from the diaphragm chamber is provided with an eccentric circular groove, the eccentric circular groove is inclined downward from the outside to the inside, and the eccentric circular groove is eccentric to the side with the discharge port.

[0006] The working principle and beneficial effects of this scheme are as follows: the diaphragm chamber cover and the diaphragm chamber are fixed together, the diaphragm is installed between the diaphragm chamber and the diaphragm chamber cover, and fixedly connected to the piston, the clamping ring of the diaphragm chamber cover is in close contact with the diaphragm, and when in use, the diaphragm constantly approaches the diaphragm chamber cover and then moves away from the diaphragm chamber cover, and reciprocates under the drive of the piston. An eccentric circular groove is provided at the contact position between the diaphragm and the clamping ring, and the clamping ring shrinks inwards, forming an obtuse angle with the contact point of the diaphragm, so that when the diaphragm approaches the diaphragm chamber cover, the clamping ring avoids cutting into the diaphragm, resulting in "over-compression" and "over-shear" between the diaphragm and the clamping ring when the diaphragm approaches the diaphragm chamber cover, effectively increasing the service life of the diaphragm and the service life of the diaphragm. The design of the eccentric circular groove avoids stress concentration at the contact position between the diaphragm chamber cover and the diaphragm pump, reduces the resistance during diaphragm movement, improves the alumina production efficiency, reduces the time of shutdown for maintenance, and increases the company's economic benefits.

[0007] Furthermore, the diaphragm chamber is provided with a diaphragm chamber end face, which is fixedly connected to the bottom plate, and is a semicircular end face protruding toward one side of the clamping ring. The diaphragm chamber end face protruding toward the clamping ring can guide the diaphragm, and also support the diaphragm when the diaphragm runs to the diaphragm chamber end face, and reduces the size of the diaphragm chamber cavity, avoiding alumina aggregation into the cavity of the diaphragm chamber, resulting in accumulation and waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a cross-sectional view of a diaphragm chamber gland and a diaphragm chamber assembled to extend the service life of the diaphragm according to the utility model;

[0009] Figure 2 This is a front view of a diaphragm chamber gland for extending the service life of the diaphragm according to the utility model;

[0010] Figure 3 for Figure 2 Section view along section AA;

[0011] Figure 4 This is a cross-sectional view of the original diaphragm chamber gland and diaphragm chamber after assembly;

[0012] Figure 5 This is a cross-sectional view of the original diaphragm chamber gland. DETAILED DESCRIPTION

[0013] The following is further described in detail through specific implementation methods:

[0014] The figure marks in the drawings of the specification include: diaphragm chamber cover 1, clamping ring 11, eccentric circular groove 12, diaphragm chamber end face 13, feed inlet 14, discharge port 15, diaphragm chamber 16, diaphragm pump 2, diaphragm 3, original diaphragm chamber cover 4, original clamping ring 41, original diaphragm chamber end face 42.

[0015] The embodiment is basically as shown in the attached Figure 1 to Figure 5 As shown: a diaphragm chamber gland for extending the service life of the diaphragm, the diaphragm chamber gland 1 comprises an integrally formed bottom plate and an annular diaphragm chamber 16, a feed port 14 is provided at the top of the diaphragm chamber 16, a discharge port 15 is provided at one end of the diaphragm chamber 16 opposite to the feed port 14, a clamping ring 11 is fixedly connected to the end of the diaphragm chamber 16 away from the bottom plate, the outer wall of the clamping ring 11 is flush with the outer wall of the diaphragm chamber 16, the inner wall of the clamping ring 11 is eccentric to the discharge port 15, an eccentric circular groove 12 is provided on the side of the clamping ring 11 away from the bottom plate, the eccentric circular groove 12 is eccentric to the discharge port 15, and the eccentric circular groove 12 is downwardly inclined from the outside to the inside; a diaphragm chamber end face 13 is provided inside the diaphragm chamber 16, the diaphragm chamber end face 13 is a semicircular protrusion, and is fixedly connected to the bottom plate.

[0016] The specific implementation process is as follows: during installation, the diaphragm 3 is installed in the diaphragm pump 2 and fixedly connected with the piston of the diaphragm pump 2, the diaphragm chamber gland 1 is buckled in the diaphragm pump 2, and the clamping ring 11 is in close contact with the diaphragm 3, and then the diaphragm pump 2 and the diaphragm chamber gland 1 are fixed together with bolts and other fasteners. During use, the diaphragm 3 constantly approaches the diaphragm chamber gland 1 and then moves away from the diaphragm chamber gland 1, and reciprocates under the drive of the piston. The position where the diaphragm 3 contacts the clamping ring 11 is provided with an eccentric circular groove 12, and the clamping ring 11 shrinks inwards, forming an obtuse angle with the diaphragm 3 at the contact point, thereby avoiding the clamping ring 11 when the diaphragm 3 is close to the diaphragm chamber gland 1. Cutting into the diaphragm 3 causes "over-compression" and "over-shear" between the diaphragm 3 and the clamping ring 11, which effectively increases the service life of the diaphragm 3. The design of the eccentric circular groove 12 avoids stress concentration at the contact point between the diaphragm chamber cover 1 and the diaphragm pump 2, reduces the resistance of the diaphragm 3 during movement, and the raised diaphragm chamber end face 13 can guide the diaphragm 3. When the diaphragm 3 runs to the diaphragm chamber end face 13, it also supports the diaphragm 3 and reduces the size of the cavity of the diaphragm chamber 16, avoiding alumina aggregation into the cavity of the diaphragm chamber 16, thereby improving the efficiency of alumina production, reducing the time of shutdown for maintenance, and increasing the company's economic benefits.

[0017] The above is only an embodiment of the utility model, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A diaphragm chamber gland for extending the service life of a diaphragm, characterized in that: The diaphragm chamber pressure cover includes an integrally formed bottom plate and an annular diaphragm chamber, a side wall of the diaphragm chamber is provided with a feed port, a side of the diaphragm chamber opposite to the feed port is provided with a discharge port, an end of the diaphragm chamber away from the bottom plate is fixedly connected with a clamping ring, the outer wall of the clamping ring is flush with the outer wall of the diaphragm chamber, the inner wall of the clamping ring is eccentric to the side with the discharge port, an eccentric circular groove is provided at the end of the clamping ring away from the diaphragm chamber, the eccentric circular groove is inclined downward from the outside to the inside, and the eccentric circular groove is eccentric to the side with the discharge port.

2. The diaphragm chamber gland for extending the service life of the diaphragm according to claim 1, characterized in that: The diaphragm chamber is provided with a diaphragm chamber end surface, the diaphragm chamber end surface is fixedly connected to the bottom plate, and the diaphragm chamber end surface is a semicircle protruding toward one side of the clamping ring.

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