JPH0323756B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The disclosed technology belongs to the structural technology field of a pump type pressure feeding device having a bag-like diaphragm type elastic membrane.

<Summary of the gist> Accordingly, the invention of this application has a lid on one side of a cylindrical housing provided with an inlet/outlet for supplying a pressurized liquid such as slurry, and a lid on the other side for supplying and discharging a pressurized liquid such as slurry. An elastic membrane whose base end is fixed to the housing includes a pressurized chamber for pressurized liquid such as oil and a pressurized chamber for pressurized liquid such as slurry. This invention relates to a pumping device constructed by, and in which the elastic membrane is provided with a support for the elastic membrane, and in particular,
The base end of the bag-shaped elastic membrane is fixed to the base end of the housing or the peripheral edge of the lid, and a pressurizing chamber is formed on the outside of the elastic membrane. A sufficient gap is formed, the other end surface of the elastic membrane is fixed to a plate on the pressurizing chamber side that is connected to an actuator outside the housing via a rod, and is further made of a plate-shaped porous support with a curved cross section. The base end of is attached to either the lid body or the cylindrical body, and
This invention relates to a pressure feeding device whose tip end is fixed to the plate on the pressurizing chamber side.

<Prior art> As is well known, various pressure feeding devices such as pumps have been developed and put into practical use, such as the so-called plunger type and diaphragm type. Among these, the diaphragm type has a large pumping capacity, so Although it is widely used in various industries,
Previous models had the disadvantage of a short operating stroke relative to the diameter of the diaphragm, and low output.

In order to cope with this problem, in many of the inventions filed by the applicant, a pressure feeding device 1 as shown in FIG. 6 has been developed and put into practical use.

In the seed pressure feeding device 1, a sealed housing 4 is formed by the cylinder 2 and the front and rear lids 3, 3', and a bag-shaped elastic membrane is naturally formed inside the housing 4. 5, and its base end is held between the base end of the cylindrical drum 2 and one lid 3', and
The cover body 3' and the tip of the elastic membrane are supported so as to maintain a predetermined shape by a sleeve 6 and a bar-shaped support body 6' that slide relative to each other, and a pressurized chamber 7' is formed between the lid body 3' and the housing 4. At the same time, a pressurizing chamber 8 is formed inside, and a pump 10 of a pressure feeding device is connected to the pressurizing chamber 8.
The pump 12 is supplied from the slurry tank 11 into the pressurized chamber 7' by supplying the oil 9 of the pumped liquid and causing it to swell.
The slurry 13 is sucked in and pressed out through the filter press 1, and the slurry 13 is sucked in and forced out through the filter press 1, and the slurry 13 is pumped through a filter press 1, for example, by a large output due to the large surface area of the elastic membrane 5.
4 and subjected to a predetermined solid-liquid separation.

<Problems to be Solved by the Invention> Therefore, in the pressure feeding device 1 having the seed bag-shaped elastic membrane 5, an extremely large output can be obtained, and as described above, the operating efficiency of the filter press 14 etc. can be improved. However, since a pressurized chamber 7' is formed between the elastic membrane 5 and the housing 4,
If the slurry supplied to and discharged from the pressurizing chamber 7' is sludge containing gravel, etc., the seed gravel is accumulated between the elastic membrane 5 and the inner surface of the housing 4 at the end of the pumping process, and the slurry is deposited on the inner surface of the housing 4. There are disadvantages in that it may cause damage or cause cracks in the elastic membrane 5, etc.
Since the pressurization chamber of the supply/discharge port 14 of the pressurization chamber 8 is small,
Aside from the case of liquid supply, draining the liquid takes time and has the disadvantage of poor work efficiency.

In addition, in this seed pumping device, since there is a support member 6' inside the elastic membrane 5, the upper part of the elastic membrane 5 is supported when contracted, but the lower part hangs down due to the cylindrical body. As mentioned above, slurry particles and the like become interposed between the cylindrical body 2 and the elastic membrane 5, which inconveniently causes premature damage to the elastic membrane 5. There was a disadvantage that the score also decreased.

<Objective of the Invention> The object of the invention of this application is to solve the problem of damage to the elastic membrane of a pumping device having a bag-shaped elastic membrane, which was developed in the applicant's earlier invention based on the above-mentioned prior art. As a technical issue, we created a powerful output with a bag-shaped elastic membrane by arranging the pressurized chamber and the pressurized chamber oppositely, which are formed by an elastic membrane that is supported with shape retention even in the contracted position. The purpose of the present invention is to provide an excellent pressure feeding device that fully takes advantage of the advantages of pressure feeding, has good work efficiency, does not require maintenance, inspection, and maintenance, and has improved durability, thereby benefiting the fields in which liquid processing technology is used in various industries. It is.

<Means/effects for solving the problems> In order to solve the above-mentioned problems, the structure of the invention of this application, which is summarized in the above-mentioned claims in accordance with the above-mentioned purpose, is sealed by a cylinder body and front and rear lids. A pressurized liquid such as slurry is fed to an inner pressurized chamber formed inside a bag-like elastic membrane whose link-like end is fixed to the base of the cylinder or to the lid. At the same time, the plate, which is clamped to the other end of the elastic membrane, is opposed to it by an actuator such as a hydraulic cylinder outside the other lid via a rod, and the elastic membrane is expanded to cover the pressurized chamber. By filling a specified amount of pumped fluid and operating the actuator, pressurized fluid such as pressurized oil is supplied to the pressurizing chamber on the housing and elastic membrane side, contracting the elastic membrane together with the plate and pressurizing the inside. The pressurized liquid in the pressure chamber is pressurized and sent to the next stage filter press etc. through the supply/discharge port, and after a predetermined stroke, the pressurized liquid is again supplied from the supply/discharge port, and in the process, the actuator operates to close the plate. The pressurized liquid in the pressurized chamber is smoothly drained from the drain port, which has a larger diameter than the liquid supply port, through the rod and the fluid supply port, so that the next pressurization process can be carried out quickly.During this time, the pressurized chamber has elasticity. Because it is formed inside the membrane, it will not be damaged by gravel, etc. fed into the housing, and will not cause cracks in the elastic membrane if gravel, etc. is caught between the housing and the elastic membrane. The shape of the elastic membrane is maintained by a porous support with a curved cross section provided between the lower side of the elastic membrane and the cylindrical body, so that it does not accidentally come into contact with pressure oil, etc. Even if sand etc. is mixed in, it will fall from the small hole of the support body to the cylinder side, and the durability of the elastic membrane can be maintained without causing sliding between the elastic membrane and the support body through sand etc. This was achieved by taking technical measures.

<Embodiments - Configuration> Next, embodiments of the invention of this application will be described below based on FIGS. 1 to 5. Furthermore, the 6th
Components having the same features as those in the drawings will be described using the same reference numerals.

In the embodiment shown in FIGS. 1 to 3, 1' is a pressure feeding device which constitutes the gist of the invention of this application, and this embodiment uses a filter press 14 to feed slurry-like sludge containing fine sand, gravel, etc. under pressure. The cylindrical body 2 and the front and rear lids 3, 3' form a housing 4 with a constant capacity.

Inside the housing 4, there is a rubber elastic membrane 5' that bulges out like a bag even in its natural state, and its base ring-shaped end is connected to the base end of the lid 3 via a ring-shaped retainer 30. It is fixed in a clamped state with bolts or the like (not shown).

A support plate 33 made of metal and having a semicircular cross section is integrally connected to the retainer 20 and has a large number of small holes 34, 34, . . . as shown in FIG. The full stroke length of the elastic membrane 5' is provided in a pressurizing chamber 8' between the lower side of the elastic membrane 5' and the inner surface of the lower part of the cylindrical body 2.

Further, a pressurizing chamber 8' is provided on the outside through a predetermined gap 28 having a ring-shaped cross section between the housing 4 and the cylindrical body 2.
A pressurized chamber 7' is defined inside, and the front part thereof is connected to a metal plate with a ring-shaped set gap between it and the cylindrical body 2, as shown in detail in Fig. 2. 1
6 and a sub-plate 19 whose periphery is curved toward the pressurized chamber 7' side are clamped and fixed in a substantially planar shape by bolts 22 and nuts 23, and the rear surface has a sub-plate 19 whose periphery is curved toward the pressurized chamber 7' side. A ring-shaped protrusion 31 is formed and fitted into a ring-shaped groove 32 formed corresponding to the sub-plate 15.
6 is connected to a hydraulic cylinder 18 as an actuator by a rod 17 inserted through a seal 27 of the lid body 3', and the elastic membrane 5' is inserted into the cylinder body 2 of the housing 4 by the forward and backward movement of the hydraulic cylinder 18. It expands and contracts while forming a set gap with the cylindrical body 2.

The plate 16 and the sub-plate 19 are connected to the lock nut 2 with respect to the rod 17 with the elastic membrane 5' in between.
0 and is tightened by a cap nut 21.

The pressurized chamber 7' is connected to the slurry tank 11 by an on-off valve 24, a pressure pump 12, and a filter press 14 by a three-way valve 29 connected to a supply/discharge port 15 formed in the lid 3.
The slurry 13 is supplied to the pressurized chamber 7', and is discharged by applying pressure thereto.

On the other hand, in the pressurizing chamber 8', a relatively small-diameter liquid supply port 14' and a relatively large-diameter liquid drain port 14'' are connected to the pump via on-off valves 24, 24 and an electromagnetic switching valve 25. 10 is also provided, and oil 9, which is a pressurized liquid, is supplied and discharged through a tank 26.

In the above configuration, the actuator 18 extends at full stroke, and the electromagnetic valve 2 is inserted into the pressurizing chamber 8'.
5, and the slurry 13 in the internal pressurized chamber 7' is passed through the three-way valve 29 in a position where the oil 9 from the tank 26 is filled by the pressure pump 10, that is, the elastic membrane 5' is in the minimum contracted state. When the slurry 13 is fed under pressure from the slurry tank 11 to the pressurized chamber 7' while being fed to the filter press 14, the electromagnetic valve 25 is switched so that the actuator 18 is moved back by a full stroke. , sub-plate 15
recedes, the elastic membrane 5' expands, the internal pressure of the pressurizing chamber 8' increases, and the oil 9 flows from the large-diameter drain port 14'' through the on-off valve 24 and the electromagnetic valve 25 to the tank 2.
6, and the elastic membrane 5' bulges accordingly, forming a negative pressure in the pressurized chamber 7', and the pump 12 is activated, and the three-way valve 29 is switched to open the slurry tank. The slurry from 11 is smoothly supplied from the supply/discharge port 15 into the pressurized chamber 7' in a push-pull state, so that the elastic membrane 5' is sufficiently expanded during the full stroke and reaches the end of the stroke. .

Therefore, when the electromagnetic valve 25 is switched and the three-way valve 29 is switched to operate the pressure pump 10 and the actuator 18, the pressure pump 10 supplies oil 9 from the tank 26 to the pressurizing chamber 8'.
is supplied from the liquid supply port 14' and the plate 1
6 assists in applying the pressing force, and not only applies pressure to the slurry 13 in the pressurized chamber 7', but also applies pressure to the slurry 13 in the pressurized chamber 8' between the elastic membrane 5' and the drum 2 of the housing 4. Since the set gap 28 is formed in the gap 28, the pressing force of the oil 9 is applied to the elastic membrane 5' from all sides except the lid 3, and an extremely large pressure is applied to the slurry 13, causing a kind of squeezing effect. is fed to the filter press 14 through the supply/discharge port 15 and the three-way valve 29.

During this time, when the elastic membrane 5' is compressed as shown by the dashed line in FIG.
The diameter is reduced by the hydraulic pressure from the cylinder 18, but in the process where the hydraulic cylinder 18 moves from the extended state to the contraction process and the elastic membrane 5' moves to an extended position, the upper side of the elastic membrane 5' hangs downward, and the There is a risk that the sides may sag and come into contact with the cylinder 2,
In the invention of this application, a plate-shaped support shown in FIG. Because the body 33 is extended, the lower half of the elastic membrane 5' runs along the support body 33, and in order to be supported, it does not come into direct contact with the cylinder body 2'. A gap can be maintained against the
Hydraulic pressure from the pressurizing chamber 8' in the next stage can be applied reliably from below the elastic membrane 5'.

Therefore, since the elastic membrane 5' is disposed on the support body 33 via the pressure oil, and since no sand or the like is mixed in the pressure oil, no damage-causing sliding occurs.

During this time, even if gravel or the like is accidentally inserted between the elastic membrane 5' and the support 33, many small holes 34, 3
4. It will not fall below and damage the elastic membrane 5'.

Then, by repeating the above process,
The slurry 13 from the slurry tank 11 is sucked and discharged by the pressure feeding device 1' and transferred to the filter press 14.
It is fed under high pressure to.

Moreover, in the invention of this application, since the elastic membrane 5' forms the pressurized chamber 7' inside the drum 2 of the housing 4 through a predetermined gap 28, the slurry to be supplied and discharged is Even if gravel or the like is mixed in the drum 13, it will not be caught between the inner surface of the drum 2 of the housing 4 and the elastic membrane 5', causing damage to the inner surface of the cylinder 2 or causing damage to the inner surface of the cylinder 2. Even if the inner circumferential surface of the elastic membrane 5' comes into contact with the small hole 34 of the support 33,
Since gravel and the like fall toward the cylinder 2 side from 34..., cracks in the elastic membrane 5' due to the sliding of the gravel can be avoided.

Furthermore, the curved radius formed around the sub-plate 19 and the retainer 30 prevents fatigue, cracks, etc. due to wear of the corresponding portions during expansion and contraction of the elastic membrane 5'.

Also, when the hydraulic cylinder 18 retreats, the slurry 13
In the process of sucking into the pressurized chamber 7' inside the elastic membrane 5', the lower side of the elastic membrane 5' is supported by the support body 31 via pressure oil and is expanded to the lower side of the cylinder body 2. Even if they make contact, fatigue due to sliding contact will not occur.

Therefore, when the elastic membrane 5' is stretched, the cross section is maintained in a substantially circular shape, and when the next pressurized discharge is performed, the elastic membrane 5'
The occurrence of wrinkles prevents the formation of curling up, thereby preventing the elastic membrane 5' from being damaged or cracked.

Next, the embodiment shown in FIGS. 4 and 5 is different from the above-mentioned embodiment in the structure of the support 31', in which a large number of small holes 34, 34, . The support body 31' is made up of three plates that slide with the plate 16 at its front end.
The retainer 30 is integrally supported by means such as welding, and the rearmost one is also integrally supported by the retainer 30, and in order to prevent the central one from coming off, there is a long groove 35 as shown in FIG. , the lower half of the elastic membrane 5' is supported by the support 31' in the posture from when the elastic membrane 5' is contracted to when it is expanded. Even if the support body 31' expands and contracts, the support body 31' expands and contracts accordingly.
Even when the elastic membrane 5' and the support body 31' come into contact with each other, there is no substantial sliding between them, and the elastic membrane 5' maintains its cross-sectional deformation while maintaining a predetermined ring-shaped gap with respect to the cylindrical body 2. 28 can be held all around the circumference, and prevents the lower half of the elastic membrane 5' from sagging, thereby preventing wrinkles from being formed due to loosening during expansion and contraction, and curling during the next pressurization. The effect of preventing breakage, damage, etc. from occurring due to formation is substantially the same as in the above-described embodiment.

Of course, as in the above embodiment, gravel and the like between the elastic membrane 5' and the support 31' do not fall downward through the small holes 34, 34, . . . and damage the elastic membrane 5'.

It goes without saying that the embodiments of the invention of this application are not limited to the above-mentioned embodiments; for example, a coil spring may be inserted loosely on the outside of the elastic membrane to further prevent deformation in the natural state. The following aspects can be adopted.

<Effects of the Invention> As described above, according to the invention of this application, basically, the rear end of the elastic membrane made of rubber or the like that defines the pressurizing chamber and the pressurized chamber inside the housing is connected to the lid body with its front end surface. By being fixed to the plate and making it expandable and contractible, it is possible to supply and discharge a pressurized liquid such as slurry to the pressurized chamber inside the elastic membrane, so if gravel etc. is mixed in the slurry, etc. There is no damage to the inner surface of the housing or cracks in the elastic membrane due to gravel getting caught between the elastic membrane and the housing, and the pumping function can always be maintained as designed, ensuring durability. This has an excellent effect of improving the performance.

In addition, when supplying and discharging pressurized liquid such as oil to the pressurized chamber formed between the elastic membrane and the housing, a plate integrally provided with the elastic membrane is installed on the pressurized chamber side of the housing. By connecting to an actuator such as an external hydraulic cylinder via a rod,
The pressurized liquid can be rapidly discharged, and the excellent effect of improving the working efficiency of the recycling device is achieved.

Further, by doing so, the diameter of the liquid drain port can be made larger than the diameter of the liquid supply port, and the pressurized liquid can be discharged even more smoothly.

In addition, by forming a pressurized chamber for storing a pressurized liquid such as slurry inside the elastic membrane, by providing a coil spring, multiple sleeves, and support bars on the outside of the elastic membrane, the elastic membrane can be expanded and contracted. The excellent effect of maintaining shape retention during contraction is achieved.

Accordingly, in the invention of this application, a porous support having a curved cross section is interposed between the elastic membrane and the cylindrical body of the housing, so that the elastic membrane expands from the time of contraction to the time of expansion. In order to prevent the lower half of the elastic membrane from sagging downwards due to the support, the elastic membrane is stretched in a sagging state during the process, and the next time hydraulic pressure is applied, it may break or be damaged due to wrinkles, etc. This has the excellent effect of not causing any damage.

Furthermore, even if sand or the like accidentally gets mixed into the pressurized liquid, the many small holes in the support prevent the sand or the like from falling and causing damage due to sliding between the elastic membrane and the support. .

Since the elastic membrane can maintain its cylindrical cross-sectional shape in this manner, an excellent effect of improved durability is achieved.

In addition, even though the upper half of the elastic membrane may sag, it retains its shape during the shrinking process and does not cause wrinkles or curling, so the lower half has approximately the same cross-sectional shape as the upper half. The effect is that it is retained and can be compressed and discharged uniformly.

Further, due to the large number of holes in the support, sand, gravel, etc. interposed between the support and the elastic membrane fall downward, thereby preventing damage to the elastic membrane as well as the housing.

[Brief explanation of drawings]

1 to 5 are explanatory diagrams of embodiments of the invention of this application, and FIG. 1 is an overall schematic vertical sectional view of one embodiment;
Fig. 2 is an enlarged sectional view of the joint between the plate and the elastic membrane, Fig. 3 is a perspective view of the support, Fig. 4 is a schematic longitudinal sectional view of another embodiment, and Fig. 5 is a perspective view of the support. FIG. 6 is a schematic sectional view of a pumping device based on the prior art. 15... Supply/discharge port, 4... Housing, 8'...
Pressurized chamber, 7'... Pressurized chamber, 1'... Pressure feeding device, 5'
...Elastic membrane, 16...Plate, 17...Rod, 18...Actuator, 19...Subplate, 33, 33'...Support.

Claims (1)

[Scope of Claims] 1. A pressurized chamber for pressurized liquid and a pressurized chamber for pressurized liquid are defined in a housing having a pressurized liquid supply/discharge port on one side and a pressurized liquid supply/discharge port on the other side. In a pumping device in which a bag-shaped elastic membrane is interposed and a support for the elastic membrane is provided in a housing, the proximal end of the elastic membrane is fixed to one side of the housing, and the other side is connected to the housing in a ring-shaped manner. It is fixed to a plate on the pressure chamber side having a gap, and the plate is connected to an actuator outside the housing via a rod, and a porous hole with a curved cross section is provided below the elastic membrane and closer to the housing. 1. A pumping device characterized in that a support body made of a flexible plate has its base end fixed to a housing. 2. The pumping device according to claim 1, wherein the cross section of the support body is formed in a sub-arc shape smaller than a semicircle. 3. The pressure feeding device according to claim 1, wherein the base end of the support body is fixed to the lid body. 4. The pressure feeding device according to claim 1, wherein the base end of the support body is fixed to the base end of the cylindrical body. 5. The pressure feeding device according to claim 1, wherein the support body comprises one plate. 6 A bag-shaped elastic bag defining a pressurized chamber for pressurized liquid and a pressurized chamber for pressurized liquid in a housing having a pressurized liquid supply/discharge port on one side and a pressurized liquid supply/discharge port on the other side. In a pumping device in which a membrane is interposed, the proximal end of the elastic membrane is fixed to one side of the housing, and the other side is held between the housing and a plate on the pressure chamber side having a ring-shaped gap. The plate is connected to an actuator outside the housing via a rod, and a support formed of a stretchable porous plate is interposed between the plate and the housing below the elastic membrane. A pressure feeding device characterized by: 7. The pressure feeding device according to claim 6, wherein the support body comprises a plurality of plates that are slidable relative to each other.