JP6403338B2 - Piston pump and raw material processing apparatus provided with the piston pump - Google Patents

Description

  The present invention relates to a piston pump that pressurizes and feeds a raw material, and more particularly, to a piston pump that can perform stationary sterilization and stationary cleaning.

  In the production of pharmaceuticals and cosmetics, an apparatus for atomizing or emulsifying the raw material by pressurizing and injecting the raw material is used. In such an apparatus, it may be necessary to clean and sterilize the piston pump used to press the raw material. As a pump that can be easily cleaned and sterilized, a syringe is arranged so that the syringe head provided with a liquid inlet / outlet is directed upward in the direction of gravity, and an empty chamber is continuously provided below the syringe. To the vacant chamber, the cleaning liquid is poured upward from the vacant chamber (container chamber) and discharged from the liquid inlet / outlet. During sterilization, the plunger is moved to the vacant chamber and steam is poured from the liquid inlet / outlet of the syringe head, A pump for discharging has been proposed (Patent Document 1).

JP 2011-12591 A

  In the invention described in Patent Document 1, since the cleaning liquid is poured upward from below and discharged, there is a problem that the raw material in the syringe (cylinder) tends to remain inside. In addition, the raw material in the cylinder may flow into the empty chamber, and the biting of the raw material may cause damage to the apparatus.

  The present invention provides a piston pump that prevents contamination of the raw material by preventing the raw material from remaining in the cylinder, prevents the raw material from flowing into the storage chamber, and allows easy cleaning and sterilization. The task is to do.

  In view of the above problems, a piston pump according to the present invention includes a raw material compression cylinder having a cylinder chamber with an open rear end portion, and a liquid-tight state penetrating from the rear end portion into the cylinder chamber. The plunger that moves back and forth between the dead center and the bottom dead center and the cylinder for raw material compression are slightly inclined so that the central axis along the reciprocating direction of the plunger is at the bottom of the cylinder in the direction of gravity. A support chamber that is supported and fixed at an angle, and a housing chamber that is coaxially connected to the rear end portion of the raw material compression cylinder and that has a larger-diameter cylindrical space than the cylinder chamber and receives the plunger that reciprocates outside the cylinder chamber. A hollow cylindrical storage chamber member having a discharge port for discharging the fluid in the storage chamber, and a straight line parallel to the plunger with a stroke longer than the distance between the top dead center and the bottom dead center of the plunger. A linear drive device having a reciprocating member to be driven, and a plunger reciprocatingly moved through the reciprocating member, and a raw material supply source, a cleaning liquid supply source, and a steam supply disposed on the head of the raw material compression cylinder upward in the gravitational direction A suction port that communicates with the cylinder chamber, a suction passage that communicates the suction port with the cylinder chamber, a discharge port that is disposed downward in the gravitational direction at the head of the raw material compression cylinder, and a discharge A discharge flow path communicating with the cylinder chamber to the cylinder chamber, a first check valve disposed in the suction flow path, and a second check valve disposed in the discharge flow path, When the reciprocating member of the linear drive device moves to the final end of the stroke, the accommodation chamber member is pulled into the accommodation chamber and a communication state between the cylinder chamber and the accommodation chamber is obtained.

Since the above-described configuration is provided, the piston pump of the present invention has the following operational effects.
(1) Since the raw material compression cylinder is fixed to the table with its head slightly inclined downward in the direction of gravity, liquid cannot be accumulated in the cylinder chamber after cleaning or sterilization.
(2) Since the suction port is disposed in the cylinder head so as to face upward, the raw material flows into the cylinder chamber when gravity and the plunger are retracted and the cylinder chamber becomes negative pressure.
(3) Since the cylinder head that is on the lower side in the gravitational direction due to the tilted state of the raw material compression cylinder is provided with a discharge port in the downward direction in the gravitational direction, the raw material that has flowed into the cylinder chamber is It is discharged well from the discharge port without remaining in the water.
(4) A hollow cylindrical storage chamber member having a storage chamber composed of a cylindrical space having a diameter larger than that of the cylinder chamber is connected to the rear end of the raw material compression cylinder, and the plunger is stored in the storage chamber by a linear drive device. Therefore, the cleaning liquid or steam can be injected into the cylinder chamber from the suction port, and the plunger can be cleaned or sterilized in the storage chamber.
(5) When the plunger is pulled into the storage chamber at the time of cleaning or sterilization, the cylinder chamber and the storage chamber communicate with each other, so that the communication area is also cleaned and sterilized. Therefore, the sealing means that makes the penetration of the plunger into the cylinder chamber into a liquid-tight state, such as the packing disposed in the cylinder chamber open end region, is also cleaned and sterilized.
(6) Since the discharge port is disposed in the storage chamber member so that the fluid in the storage chamber can be discharged, in any case, the cleaning liquid or the steam flows into the cylinder chamber from the suction port of the cylinder head. After coming into contact with the surface, it flows into the storage chamber and is discharged out of the storage chamber through the discharge port. With this configuration, a problem that has occurred in the case of the conventional type in which the cleaning liquid flows from the storage chamber side to the head of the cylinder chamber, that is, impurities adhering to the storage chamber dissolve in the cleaning liquid and reattach to the cylinder chamber. There is no risk of problems.

  In the piston pump of the present invention, the inclination angle is preferably 0.5 degrees or more and less than 5 degrees. With the above configuration, the raw material is satisfactorily sucked and discharged without generating a liquid pool in the cylinder chamber, and the cleaning liquid and vapor are well discharged and discharged after sterilization.

  The linear drive device in the piston pump of the present invention is preferably a cylinder member coaxially connected to the rear portion of the housing chamber member and a reciprocating member, and is slidably provided in the cylinder member. A piston that divides the internal space into a first chamber and a second chamber, reciprocates in the cylinder member, and a piston that is fixed to the piston at the rear end side and holds the plunger at the front end side and linearly drives from the inside of the cylinder member to the accommodation chamber And a driving cylinder having a shaft, and a working fluid supply means for driving and controlling the reciprocation of the piston by switching the supply and discharge of the working fluid to and from the first chamber and the second chamber.

  With the above configuration, the piston pump can be configured with a simple configuration. In the drive cylinder, the piston reciprocates within the cylinder member, and the plunger on the raw material compression cylinder side reciprocates via the piston shaft on the tip end side of the piston. When the cylinder for raw material compression is simply installed downward in the direction of gravity, if the sealing body provided between the piston shaft and the housing chamber member is broken, the working fluid flows from between the piston shaft and the cylinder in the direction of gravity. Enter a containment chamber. This working fluid also flows into the cylinder chamber of the raw material compression cylinder located in the direction of gravity. However, in the piston pump having the configuration according to the present invention, the cylinder for raw material compression is in a slightly inclined state that is almost horizontal, so that even when the sealing body is broken and the working fluid enters the storage chamber, the working fluid Does not penetrate into the raw material compression cylinder. Accordingly, the raw material compression cylinder is not easily contaminated by the working fluid.

  The piston pump of the present invention preferably includes connection means for releasably connecting the rear end portion of the raw material compression cylinder and the front end portion of the storage chamber member. According to this configuration, the raw material compression cylinder and the storage chamber member can be detached from each other and reassembled. Therefore, apart from cleaning at any time when the piston pump is used, after the completion of one raw material processing step, the raw material compression cylinder and the housing chamber member can be disassembled and the respective members can be carefully cleaned. At this time, for example, a sealing means between members such as packing can be easily attached and detached, and cleaning and replacement can be easily performed. As such a connecting means, it is desirable that it has a simple configuration, and the raw material compression cylinder and the storage chamber member can be firmly and coaxially connected to each other, and can be easily removed and reassembled.

  Preferably, the connecting means includes an insertion portion extending in a cylindrical shape from the rear side of the raw material compression cylinder, a first flange portion protruding on the outer circumference at a position in front of the insertion portion, and a storage chamber member A concave receiving portion that is provided at the front end of the receiving portion and receives and fits the insertion portion; and a rear side of the first flange portion that is provided on the periphery of the opening edge of the receiving portion. A second flange portion having a front plane that is in contact with the plane, and a clamping device that sandwiches the first flange portion and the second flange portion and couples the raw material compression cylinder and the storage chamber member. Yes.

  According to the above configuration, since the cylindrical insertion portion of the raw material compression cylinder is fitted and inserted into the concave receiving portion of the storage chamber member, the cylinder chamber, the plunger, and the storage chamber are easily coaxial. Thus, the raw material compression cylinder and the storage chamber member are assembled coaxially. At this time, since the first flange portion and the second flange portion are in contact with each other in the surface contact state between the rear side plane and the front side plane, the clamping device only holds the first and second flange portions. The coaxial connection between the raw material compression cylinder and the chamber member can be easily fixed. In addition, the connection and fixation can be easily released simply by removing the clamp device.

  In the piston pump of the present invention, preferably, the discharge port is provided on the lower side in the gravity direction of the storage chamber member and at the end of the storage chamber close to the raw material compression cylinder.

  With the above configuration, the discharge port is provided at the lowest position in the direction of gravity in the interior of the storage chamber. For this reason, the cleaning liquid after cleaning hardly remains in the storage chamber. Therefore, the piston pump can be kept clean and clean.

  The piston pump of the present invention preferably further includes a third check valve that is disposed in the discharge flow path that communicates with the discharge port and prevents the fluid from flowing backward into the storage chamber.

  With the above-described configuration, the backflow of the waste liquid can always be prevented by the third check valve even if the storage chamber becomes negative pressure without closing the discharge port.

  The piston pump of the present invention is preferably a through hole in which the inner diameter gradually increases toward the accommodation chamber between the open end of the cylinder chamber of the raw material compression cylinder and the accommodation chamber, and the plunger can pass through the inside. A plunger guide having

  With the above configuration, the plunger that has been drawn into the storage chamber after cleaning can be reliably penetrated inward from the open end of the cylinder chamber along the plunger guide.

  The piston pump of the present invention preferably further includes a branch port provided in the middle of the pipe communicating with the suction port from the outside, and a steam drain provided in communication with the discharge flow path from the discharge port. .

  With the above configuration, the suction port can communicate with the raw material supply source, the cleaning liquid supply source, and the vapor supply source via the branch port. At the time of cleaning, the cleaning liquid supplied to the pipe from the branch port is injected into the suction port, flows into the cylinder chamber through the first check valve, flows into the storage chamber, and then flows from the discharge port through the discharge channel. Discharged. Further, at the time of sterilization, when the steam supplied to the pipe from the branch port and injected into the suction port is condensed by exchanging heat with the piston pump, moisture generated by condensing the steam is discharged from the steam drain. Since the unaggregated steam itself is not discharged from the steam drain, the cylinder chamber and the storage chamber can be filled and the inside of the piston pump can be sterilized effectively.

In the piston pump of the present invention, desirably, the first check valve is a spherical valve body, a valve seat made of super engineering plastic, and the valve body is urged against the valve seat to seal the raw material, And a spring for setting the cracking pressure of the first check valve to 0.003 to 0.02 MPa.

  With the above configuration, a separate pump for pressurizing the raw material for the raw material injection becomes unnecessary. Such a pump has a large wetted area and is difficult to clean and sterilize. Since a pump for injecting the raw material under pressure is not required, impurities and germs are not easily mixed into the raw material.

The raw material processing apparatus of the present invention preferably includes a piston pump, a raw material container that stores the raw material, and a suction pipe that communicates the raw material container and the suction port.

With the above configuration, the raw material is sucked from the raw material container into the cylinder chamber as the plunger moves backward, and is discharged from the discharge port by the forward movement of the plunger. Is done well.

  Because of the above configuration, the piston pump of the present invention has an effect of preventing contamination of the raw material by preventing the raw material from remaining in the cylinder and easily cleaning or sterilizing the cleaning chamber. Yes.

The longitudinal cross-sectional view of the piston pump by one Embodiment of this invention is shown. The piping diagram of the piston pump by one Embodiment of this invention is shown. The longitudinal cross-sectional enlarged view of the cylinder head of the piston pump of FIG. 1 is shown. FIG. 2 is a state diagram showing the operation of the piston pump of FIG. 1 in each process, where (a) shows a state where the plunger has reached top dead center, (b) shows a state where the plunger has reached bottom dead center, (c). Indicates the state in which the plunger has moved to the end of the stroke.

  Referring to FIGS. 1 and 2, a piston pump according to an embodiment of the present invention includes a material compression cylinder 21 having a cylindrical cylinder chamber 22 having a rear end opened therein, and a cylinder from the rear end to the cylinder. One end is inserted into the chamber 22, and the plunger 11 is moved back and forth between the top dead center and the bottom dead center for feeding out the raw material, and the open end side inner wall surface of the cylinder chamber 22 is disposed between the plunger 11. The center axis X of the raw material compression cylinder 21 is nearly horizontal with a slight inclination angle with respect to the horizontal axis H so that the sealing 23 to be sealed and the columnar head portion 21a of the cylinder 21 are on the lower side in the gravity direction. The base 14 for supporting and fixing the raw material compression cylinder 21 in an inclined state and the other end side of the plunger 11 that is coaxially connected to the rear portion of the raw material compression cylinder 21 and reciprocates outside the cylinder chamber 22 are received. The plunger 11 is directly driven as the hollow cylindrical storage chamber member 31 having the storage chamber 32 and the discharge port 33 for discharging the cleaning liquid or vapor in the storage chamber 32 and the linear drive device 40 that reciprocally drives the plunger 11. A drive cylinder 46 and a hydraulic device 50 that operates the drive cylinder 46 by controlling the supply and discharge of the working fluid; a suction port 61 that is disposed upward in the direction of gravity for supplying the raw material, vapor, or cleaning liquid to the cylinder chamber 22; 22 is a first check that is disposed in a discharge port 62 that discharges the material pressurized by the plunger 11 downward in the direction of gravity and a suction flow path 63 that communicates the suction port 61 with the cylinder chamber 22. A second check valve 72 disposed in a discharge flow path 64 that communicates the valve 71, the discharge port 62 with the cylinder chamber 22, and the discharge port 33. It includes a third check valve 36 to prevent fluid backflow into Luo communication with discharge passage 30 to the arranged has been accommodating chamber 32.

  In the present embodiment, for the sake of convenience, the direction closer to the head 21 a than the center of the raw material compression cylinder 21 may be referred to as the front, and the direction closer to the storage chamber member 31 from the center may be referred to as the rear.

  When the raw material compression cylinder 21 is supported and fixed by the table 14 in the inclined state, it is desirable that the inclination angle α is set to 0.5 degrees or more and less than 5 degrees. A particularly preferable inclination angle α is an inclination of 1/100 (0.573 degrees) or more and 1 ° or less. The gradient of 1/100 is described in the guideline (issued by the Ministry of Health, Labor and Welfare) regarding the production of aseptic pharmaceuticals by aseptic manipulation. This gradient is a gradient in which the liquid in the cylinder chamber 22 flows due to its own weight. Since the raw material compression cylinder 21 is installed in a substantially horizontal inclined state with a slight inclination angle so that the head 21a is on the lower side in the direction of gravity, no raw material remains in the cylinder chamber 22. When the inclination angle α exceeds 5 degrees, the disassembly and cleaning of the piston pump 10 and the operability of assembly are deteriorated. In addition, it is easy to provide the suction port 61 on the upper surface of the raw material compression cylinder 21 in a direction perpendicular to the cylinder center axis X. However, when the suction port 61 has an inclination of 5 degrees or more, the material supply by its own weight is smoothly performed. May not be done. In the inclined state of 1 °, the raw material is satisfactorily supplied only by its own weight and the negative pressure due to the backward movement of the plunger 11.

  Since the raw material compression cylinder 21 is disposed on the table 14 in a substantially horizontal inclined state, the seal of the packing 35b provided between the storage chamber member 31 and the piston shaft 45 of the drive cylinder 46 is broken. Even so, the working fluid does not enter the cylinder chamber 22 of the raw material compression cylinder 21. For this reason, the inside of the cylinder chamber 22 can be kept clean.

  The pressure of the raw material in the cylinder chamber 22 reaches a high pressure of 100 MPa to 245 MPa. The raw material compression cylinder 21 has a thickness that can withstand this high pressure. Since this cylinder 21 is cleaned using a chemical solution, it is made of a corrosion-resistant metal material such as precipitation hardening stainless steel or austenitic stainless steel.

  Here, the cleaning liquid is an inorganic base aqueous solution, an inorganic acid aqueous solution, a basic cleaning agent mainly composed of an inorganic base such as sodium hydroxide or potassium hydroxide, and a surfactant, and an acid cleaning comprising an inorganic acid and a surfactant. Agents, sodium hypochlorite, active chlorine, basic disinfectants mainly composed of surfactants, nonpolar solvents and other chemicals are used.

  The cylinder chamber 22 of the raw material compression cylinder 21 has a packing storage portion 22b that is recessed in the inner wall surface of the open end side region, and a packing 23 as a sealing means for sealing between the plunger 11 is provided. It extends from the packing storage portion 22b to the storage chamber member 31 side. The packing 23 is disposed with at least one, preferably a plurality of sealing members in close contact with each other. The packing 23 composed of a plurality of sealing members is manufactured in a shape suitable for sealing performance. The packing 23 may include a support member that supports the position of the plunger 11 on the axis of the cylinder 21.

  The packing 23 is any material that simultaneously satisfies the pressure resistance against the pressure for pressurizing the raw material, the heat resistance against the temperature of the steam injected into the cylinder chamber for sterilization, and the chemical resistance against the chemical liquid that is the steam or cleaning liquid, and the corrosion resistance. Can be made with. The packing 23 is made of polytetrafluoroethylene (PTFE), polyetheretherketone (PEEK), polyethersulfone (PFE), polyimide (PI) or other super engineering plastic, a copolymer containing these, CFRP, or the like. The

  Since the packing 23 is closely arranged, the raw material is prevented from adhering between the inner surface of the packing storage portion 22b and the packing 23, and the packing is fixed. As described above, if the clamping device 13 of the connecting means is removed, the raw material compression cylinder 21 and the storage chamber member 31 can be easily detached from each other. In this state, the packing 23 is removed from the packing storage portion 22b of the cylinder chamber 22. Can be easily disassembled and removed. In addition, the packing 23 can be easily assembled to the packing storage portion 22b when the raw material compression cylinder 21 and the storage chamber member 31 are connected.

  The plunger 11 is a rod member having a columnar shape, and is made of super steel metal, fine ceramics, or other highly rigid material. The plunger 11 may be subjected to a surface treatment that provides wear resistance, such as DLC (diamond-like carbon) coating or TiCN (titanium carbonitride) coating, depending on the raw materials and usage conditions.

  The plunger 11 is held with a degree of freedom in inclination and position on a piston shaft 45 formed integrally with a piston 42 that reciprocally slides in the drive cylinder 46 by a fixing member 17 at the rear end. Therefore, the plunger 11 reciprocates in the cylinder chamber 22 at one end side as the piston 42 and the piston shaft 45 are linearly driven. Since the plunger 11 is held with a degree of freedom, the plunger 11 reciprocates inside the cylinder chamber 22 while maintaining its posture by the packing 23.

  When pressurizing the raw material, the plunger 11 reciprocates between the top dead center and the bottom dead center in the cylinder chamber 22. When cleaning or sterilizing, as will be described later, the plunger 11 moves back in the cylinder chamber 22 and is in the cylinder chamber 22 inside the storage chamber member 31 connected to the rear portion of the raw material compression cylinder 21. It is drawn into the storage chamber 32 communicating with the rear.

  The storage chamber member 31 is a hollow cylindrical member, and the storage chamber 32 is formed by an internal cylindrical space. The storage chamber member 31 is coaxially connected to the rear portion of the raw material compression cylinder 21, and the cylinder member 41 of the drive cylinder 46 is coaxially connected to the rear end portion of the storage chamber member 31. 21, the storage chamber member 31, and the cylinder member 41 of the drive cylinder 46 are integrated into a housing of the cylinder pump 10. The continuous connection of the cylinder member 41 to the storage chamber member 31 can be realized, for example, by screw fastening.

  The front of the storage chamber member 31 is partitioned by a partition wall 31 a on the raw material compression cylinder 21 side, and the storage chamber 32 is provided as a chamber partitioned by the inner surface of the partition wall 31 a and the piston shaft 45. Accordingly, the storage chamber 32 is provided between the piston 42 on the rear end side of the cylinder chamber 22 of the raw material compression cylinder 21, is larger in the radial direction than the cylinder chamber 22, and moves the plunger 11 in the cylinder direction in the axial direction. 22 is a space that has a length that allows it to be pulled out from 22 toward the back of the packing 23. A substantially cylindrical through hole 31b is formed at the center of the partition wall 31a, and the plunger guide 12 is received in the through hole 31b.

  The piston pump 10 includes connection means for releasably connecting the material compression cylinder 21 and the storage chamber member 31. The connecting means includes an insertion portion 21c that extends in a cylindrical shape from the rear side of the raw material compression cylinder 21, a first flange portion 21b that protrudes on the outer periphery at a position in front of the insertion portion 21c, and a storage chamber. A concave receiving portion 31c that is provided in front of the partition wall 31a of the member 31 and receives and fits the insertion portion 21c, and protrudes on the periphery of the opening edge of the receiving portion 31c, and is in a fitted state with the insertion portion 21c. The second flange portion 31d having a front plane that is in contact with the rear plane of the first flange portion 21b, and the clamp device 13 that clamps the first flange portion 21b and the second flange portion 31d that are in contact with each other. It consists of and. The cylinder chamber 22 and the storage chamber 32 are coaxially connected in the insertion fitting state of the insertion portion 21c and the concave receiving portion 31c, and the first and second flange portions 21b abutting each other in this fitting state, By clamping 31d with the clamp device 13, the coaxial connection between the raw material compression cylinder 21 and the storage chamber member 31 is fixed, and the connection can be released simply by removing the clamp device 13.

  The clamp device 13 is constituted by, for example, an annular member having a groove 13a inside. The clamping device 13 is manufactured in half so that each forms a semicircle. Both ends of the two members of the clamp device 13 are connected by a connecting member such as a bolt, a nut, a pin, or the like. The clamping device 13 sandwiches and fixes the first flange portion 21b and the second flange portion 31d with the groove 13a. At this time, the first flange portion 21b is urged toward the second flange portion 31d. The clamp device 13 fixes the raw material compression cylinder 21 to the storage chamber member 31 against the pressure of the raw material compressed by the plunger 11 in the cylinder chamber 22. Since the clamp device 13 is fixed by tightening the two members with a coupling member, it can be easily attached and detached. Since the clamp device 13 has a simple shape, it is easy to clean and to keep the device clean.

  The storage chamber member 31 includes a sensor 34 (34a, 34b, 34c) that detects the piston shaft 45 of the piston 42. The sensor 34a detects the position of the piston shaft 45 when the plunger 11 reaches top dead center. The sensor 34b detects the position of the piston shaft 45 when the plunger 11 reaches the bottom dead center. The sensor 34c detects the piston shaft 45 when the piston 42 moves to the end of the stroke and the plunger 11 is drawn into the storage chamber 32. The sensor 34 can be a proximity switch or a limit switch. The sensor 34b for detecting the bottom dead center is preferably a sensor with a self-diagnosis function. By using a sensor with a self-diagnosis function, when the sensor fails, the failure can be detected and the power of the apparatus can be shut off. If the sensor 34b cannot detect the bottom dead center, the plunger may move back to the retracted end. In the raw material pressurizing step, if the plunger 11 is retracted to the retracted end, the raw material flows into the storage chamber 32, so that the plunger 11 is galled, the third check valve 36, the thermometer 38, the steam drain 37 is damaged, etc. An unexpected failure of the piston pump 10 device occurs. Since the sensor 34b is a sensor with a self-diagnosis function, the malfunction of the piston pump 10 and the outflow of raw materials can be prevented.

  The sensor 34b may be provided with a timer for measuring the reciprocation time between the normal sensor and the plunger 11 instead of using the B contact sensor with a self-diagnosis function. When the timer is provided, a warning is issued when the reverse time from the top dead center to the bottom dead center of the drive cylinder 46 that drives the plunger 11 linearly exceeds a predetermined time, or the power of the drive cylinder 46 can be shut off. In this case, the piston pump 10 can detect a failure of the sensor 34b.

 A drain hole 35 is provided behind the storage chamber member 31. A packing 35 a is provided in front of the drain hole 35. By providing the drain hole 35 and the packing 35a, even when the sealing of the packing 35b is broken, leakage of hydraulic oil to the storage chamber 32 side or leakage of steam / cleaning liquid to the cylinder member 41 side is prevented. To prevent.

  The discharge port 33 is provided on the lower side in the direction of gravity of the storage chamber 32, preferably on the lower side in the direction of gravity on the front side of the storage chamber 32 (on the side of the compression raw material cylinder 21). The discharge port 33 discharges the cleaning liquid and steam condensed water flowing into the cylinder chamber 22. Since the piston pump 10 is arranged at a slight angle so that the cylinder head portion 21a is on the lower side in the direction of gravity, the steam condensed water or the cleaning liquid flowing into the storage chamber 32 stays in the storage chamber 32. Without discharge, it is discharged well.

  A steam drain 37 and a third check valve 36 are connected to the discharge flow path 30. The third check valve 36 prevents fluid from flowing into the storage chamber 32 from the discharge port 33. The steam drain 37 discharges water generated by the condensation of steam when the steam exchanges heat with each component of the piston pump 10 and the temperature of the steam decreases. Since the steam drain 37 is provided in the discharge flow path 30 from the discharge port 33 located at the lowermost part of the storage chamber 32, water generated in the storage chamber 32 is unlikely to remain in the storage chamber 32. When the cleaning liquid or the like remains in the storage chamber 32, the solute of the cleaning liquid is deposited on the wall surface of the storage chamber 32, and the foreign matter washed out by the cleaning liquid adheres, or remains in the cleaning liquid, the precipitated solute, the attached foreign matter, or the vapor drain. There is a risk that various bacteria will propagate. Since the discharge port 33 is disposed on the lower side in the gravity direction of the end portion of the storage chamber 32 near the cylinder chamber 22, these can be prevented.

  In order to confirm that the cylinder chamber 22 and the storage chamber 32 have reached a predetermined temperature during steam sterilization, a resistance thermometer 38 such as a thermoelectric element, a resistance temperature detector, or a thermistor is provided between the discharge port 33 and the steam drain 37. It is preferable to provide other temperature measuring means. The sterilization effect can be assured by maintaining at a predetermined temperature for a certain period.

  The plunger guide 12 is inserted and accommodated in the through hole 31b formed in the partition wall 31a from the raw material compression cylinder 21 side. The through hole 31b is a stepped hole having an enlarged diameter portion on the front side. The plunger guide 12 has a stepped cylindrical shape whose outer surface is fitted and inserted into the through hole 31b, and includes a through hole 12a through which the plunger 11 passes. The through hole 12 a communicates with a packing storage portion 22 b provided in the cylinder chamber 22. The rear end of the through hole 12a has a substantially conical surface 12b whose cross section gradually increases toward the accommodation chamber 32 side. When the plunger 11 is drawn into the housing chamber 32, the plunger 11 lies with the cylinder chamber 22 side tilted downward in the weight direction. When the plunger 11 is re-inserted into the cylinder chamber 22 from the position where the accommodating chamber 32 is also drawn in, the one end side of the plunger 11 is guided by the substantially conical surface 12b and smoothly passes through the through hole 12a. Is inserted well into the cylinder chamber 22.

  The substantially conical surface 12b only needs to have a function of guiding the plunger 11 and guiding it to the cylinder chamber 22, and widely includes a conical surface, a spindle surface, a morning glory surface, and the like.

  The plunger guide 12 includes a cooling pipe 15. The cooling pipe 15 passes from the upper outer surface of the storage chamber member 31 through the storage chamber member 31, opens to the through hole 12 a, further extends downward from the through hole 12 a, and opens to the lower outer surface of the storage chamber member 31. It communicates with the coolant outlet 20. The coolant generator 81 generates a coolant that is pure water and feeds the coolant to the cooling pipe 15. The cooling liquid is supplied to the packing 23 through the cooling pipe 15 and the through hole 12a. The coolant wets the packing 23, removes sliding heat between the packing 23 and the plunger 11, and is discharged from the discharge port 20. The coolant further acts as a lubricant between the plunger 11 and the packing 23. A drain 19 and a check valve 18 are provided in the discharge passage communicating with the discharge port 20. At the time of raw material processing, if the packing 23 leaks due to wear, the leaked raw material can be discharged to the discharge port 20 to prevent the raw material from entering the storage chamber 32. The discharge port 20 discharges cleaning liquid or steam condensed water during cleaning or sterilization.

  The linear drive device 40 is demonstrated according to FIG.1 and FIG.2. The linear drive device 40 includes a drive cylinder 46 and a hydraulic device 50 that is a working fluid supply means. The hydraulic device 50 can be provided inside the table 14.

  The drive cylinder 46 will be described with reference to FIG. The drive cylinder 46 includes a hollow cylindrical cylinder member 41 having a hollow portion 43 therein, a cylindrical piston 42 that reciprocates in the hollow portion 43, and a piston shaft 45 that is integrally formed with the piston 42. It is equipped with. One of the cylinder members 41 is connected to the rear end portion of the storage chamber member 31 via a screw mechanism or the like. The piston shaft 45 slides with respect to the inner wall surface of the storage chamber 32, and reciprocates within the cylinder member 41 together with the piston 42. The cavity 43 is partitioned by a piston 42 into a first chamber 43a and a second chamber 43b that are working fluid chambers. A space defined by the rear end of the piston 42 and the inner surface of the cylinder member 41 is the first chamber 43a. A space defined by the front end surface of the piston 42, the piston shaft 45, and the inner surface of the cylinder member 41 is the first chamber 43a. Two chambers 43b.

  The entire stroke of the drive cylinder 46 is a distance (reciprocating stroke) from the top dead center to the bottom dead center of the plunger 11 at the time of raw material processing, and an additional stroke for further pulling the plunger 11 into the storage chamber 32 from the bottom dead center. It has the length which added.

  In the present embodiment, the piston 42 and the piston shaft 45 are integrally formed. However, the piston 42 and the piston shaft 45 may be configured as separate members and coupled to each other.

  The cylinder member 41 is provided with working fluid supply / discharge ports 44a and 44b for supplying and discharging working fluid to and from the first chamber 43a and the second chamber 43b, respectively. In this embodiment, the case where hydraulic oil is used as the working fluid and the drive cylinder 46 is used as the hydraulic cylinder will be described as an example. However, the hydraulic fluid in the present invention uses hydraulic oil, high-pressure water, or other incompressible fluid. it can. When the plunger 11 is moved backward in the direction of the storage chamber 32, the hydraulic oil 50 is supplied to the second chamber 43b by switching the direction switching valve 54 of the hydraulic device 50.

  The hydraulic device 50 is a device that controls supply and discharge of hydraulic oil to and from the first chamber 43 a and the second chamber 43 b of the drive cylinder 46, and sucks the hydraulic oil from the tank 51 that stores the hydraulic oil. A hydraulic pump 52 that discharges to the hydraulic oil supply flow path, a motor 53 that drives the hydraulic pump 52, a first flow path that communicates with the first chamber 43a, and a second flow path that communicates with the second chamber 43b, A hydraulic open circuit including a direction switching valve 54 for switching connection with the hydraulic oil supply flow path and a relief valve 55 is configured.

  In addition, instead of the hydraulic device 50 including the direction switching valve 54, a closed circuit hydraulic device including a reversible motor and a bidirectional discharge hydraulic pump is used, and each of the two ports of the hydraulic pump is connected to the hydraulic oil supply / discharge port 44a. , 44b can be connected to provide an efficient system with high responsiveness. In this case, a variable displacement hydraulic pump is used to offset the difference between the hydraulic oil supply amount and the discharge amount depending on the presence or absence of the piston shaft 49 between the first chamber 43a and the second chamber 43b. A hydraulic device having a circuit or the like may be used. Since various hydraulic devices are constructed as products, they can be appropriately selected and used according to the actual scale and processing conditions of the piston pump 10 of the present invention.

  Further, the linear drive device 40 according to the present invention is not limited to the configuration of the hydraulic cylinder and hydraulic device as in the above embodiment, but includes a linear drive guide, a servo mechanism including a ball screw and a servo motor, a linear motor and other linear drive means. Available. Of course, when high pressure water is used as the working fluid, a high pressure water generator is used instead of the hydraulic device 50.

  In the raw material compression cylinder 21, the suction port 61 and the cylinder chamber 22 are arranged in a suction flow path that communicates with the cylinder chamber 22 in the gravity direction above the cylinder chamber 22 of the head 21 a. The first check valve 71 supplies the raw material, vapor, or cleaning liquid supplied to the suction port 61 to the cylinder chamber 22 and prevents the raw material pressurized by the plunger 11 from flowing back to the suction port 61. The first check valve 71 includes a valve body 73 which is a sphere, a valve seat 74 having a conical valve seat surface for receiving the valve body 73, a spring 76 and a housing 75. The valve seat 74 has a substantially columnar shape and includes tapered surfaces 74a on both sides. The tapered surface 74a, the cylinder 21 and the housing 75 around the suction port 61 are in contact with each other and assembled in a liquid-tight state. The spring 76 biases the valve body 73 toward the valve seat 74. Since the parts constituting the check valve 71 have a simple shape, they are suitable for cleaning and sterilization. The valve body 73, the housing 75, and the spring 76 are formed of a corrosion-resistant metal.

  The valve seat 74 can be made of PTFE, PEEK, PES, PI or other super engineering plastics. The material of the valve seat 74 is more desirably a resin having wear resistance. The valve seat 74 is made of resin having hot water resistance, pressure resistance, and chemical resistance, so that it can not only withstand the steam temperature and the pressure of the raw material during pressurization, but can also be cleaned in place with various chemical solutions. Become. Further, the valve seat 74 made of resin can prevent generation of harmful wear powder due to contact with the valve body 73 and mixing of the wear powder into the raw material. Further, since the valve seat 74 is made of resin, it can be elastically deformed by tightening the housing 75 to seal between the housing 75 and the cylinder chamber 22.

  The cracking pressure of the first check valve 71 is set to 0.003 to 0.02 MPa. The cracking pressure is desirably 0.003 to 0.01 MPa. Since the cracking pressure is set very low, the first check is performed against the bias of the spring 76 by the negative weight generated in the cylinder chamber 22 due to the weight of the raw material in the raw material container 91 and the retraction of the plunger 11. The valve 71 is opened. For this reason, when the plunger 11 moves backward, the raw material flows from the raw material container 91 into the cylinder chamber 22. That is, the piston pump 10 sucks the raw material when the plunger is retracted.

  As described above, since the raw material is sucked into the cylinder chamber 22 as the plunger 11 moves backward, another pump for injecting the raw material becomes unnecessary. Such a pump has a large wetted area and is difficult to clean and sterilize. Since the piston pump 10 does not require such another pump for pressurizing the raw material, impurities and germs are not easily mixed into the raw material.

  The suction port 61 is provided coaxially with the first check valve 71, and the member in which the suction port 61 is formed is fastened to the raw material compression cylinder 21 with a bolt 16, and the first check valve 71 is connected to the cylinder 21. And the member of the suction port 61 are coaxially fixed. The members of the first check valve 71 and the suction port 61 can be easily disassembled and reassembled from the cylinder 21 when cleaning, sterilization, or replacement becomes necessary.

  The discharge port 62 is provided in the cylinder head 21a so as to open to the lower side in the gravity direction, and the second check valve 72 is lower in the gravity direction than the cylinder chamber 22 of the cylinder head 21a. The discharge port 64 and the cylinder chamber 22 are disposed in a discharge flow path 64. The second check valve 72 is closed when the plunger 11 sucks the raw material, the cleaning liquid, or the vapor into the cylinder chamber 22, and opens when the plunger 11 pressurizes the raw material. Accordingly, the raw material pressurized by the advance of the plunger 11 in the cylinder chamber 22 is discharged from the discharge port 62 and sent to the chamber 92. The structure of the second check valve 72 is the same as that of the first check valve 71, and the fixing structure in which the member formed with the discharge port 62 can be detached from the raw material compression cylinder 21 is also the same as that of the suction port 61. Detailed description thereof will be omitted.

  It is desirable to provide a thermometer 39 in the vicinity of the discharge port 62 so that the temperature of the vapor discharged from the discharge port 62 during sterilization can be measured.

  The operation of the piston pump 10 according to the present embodiment will be described below with reference to FIG.

  When pressurizing the raw material, it operates as follows. When hydraulic oil is supplied to the first chamber 43a by the hydraulic device 50, the hydraulic oil is discharged from the second chamber 43b to the tank 51, and the plunger 11 moves forward. At this time, the raw material in the cylinder chamber 22 is compressed to increase its pressure. When the pressure exceeds the cracking pressure of the second check valve 72, the second check valve 72 is opened, and the pressurized raw material is discharged from the discharge port 62.

  As shown in FIG. 4A, when the plunger 11 moves forward and reaches top dead center, the sensor 34a detects the piston shaft 45. At this time, the hydraulic device 50 switches the supply of hydraulic oil to the second chamber 43b. When the hydraulic oil is supplied to the second chamber 43b, the hydraulic oil in the first chamber 43a is discharged to the tank 51, and the plunger 11 moves backward. When the plunger 11 moves backward and the differential pressure between the static pressure from the liquid level of the raw material container 91 applied to the raw material and the negative pressure in the cylinder chamber 22 exceeds the cracking pressure of the first check valve 71, the first check valve 71 opens, and the raw material flows into the cylinder chamber 22 from the suction port 61.

  As shown in FIG. 4B, when the plunger 11 reaches the bottom dead center, the sensor 34b detects the piston shaft 45. Then, the hydraulic device 50 switches the supply of hydraulic oil to the first chamber 43a again. By repeating the above operation, the piston pump 10 continuously repeats the suction and discharge of the raw material.

  When cleaning or sterilizing the piston pump 10, the hydraulic device 50 moves the piston 42 toward the rear end of the cylinder member 41. When the plunger 11 reaches the bottom dead center, the sensor 34b detects this. The hydraulic device 50 continues to supply hydraulic oil to the second chamber 43b, and the piston 42 moves to the end of the cylinder member 41, which is the stroke end, as shown in FIG. 4 (c). When the piston 42 reaches the end, the sensor 34c detects the piston shaft 45.

  When the piston 42 is retracted to the rearmost end of the cylinder member 41, the distal end portion of the plunger 11 is retracted from the middle of the substantially conical surface 12b of the plunger guide 12 to a position behind it. At this time, since the tip end of the plunger 11 is also removed from the packing 23, the cylinder chamber 22 and the storage chamber 32 communicate with each other. Since the surface of the packing 23 is completely exposed, the entire surface of the packing 23 can come into contact with the cleaning liquid or vapor. The entire surface of the plunger 11 can come into contact with the cleaning liquid or steam. Since the plunger 11 is located from the middle of the substantially conical surface 12b to the rear thereof, the effective cross-sectional area through which the cleaning liquid or steam passes is increased around the tip of the plunger 11. Accordingly, the cleaning liquid or steam flows smoothly from the cylinder chamber 22 into the storage chamber 32.

  In this state, cleaning liquid or steam is supplied from the suction port 61. Cleaning fluid or steam flows from the cylinder chamber 22 into the storage chamber 32, and cleaning or sterilization is performed on the entire liquid contact portion of the piston pump 10. As the cleaning liquid, an alkaline cleaning liquid is suitable for organic materials, and a neutral cleaning liquid is suitable for pharmaceuticals. The concentration of the cleaning liquid is adjusted according to the raw material. The flow rate is suitably 1 to 2 m / s inside the raw material cylinder chamber 22.

  When the plunger 11 is retracted to the position for cleaning or sterilization, it is essential that the tip of the plunger 11 passes through the packing 23, but the retracted position is not particularly limited. However, as in the present embodiment, it is desirable to provide a sufficient space for the cleaning liquid or steam to flow between the plunger 11 and the periphery thereof. This space is not limited to a conical space, and a cylindrical shape, a spline groove, and a spiral groove can be used. Further, the entire plunger 11 may be completely accommodated in the accommodation chamber 32.

  In the cleaning process, the cleaning liquid that has passed through the first check valve 71 from the suction port 61 flows into the cylinder chamber 22, contacts the packing 23, flows into the storage chamber 32, and is discharged from the discharge port 33. As described above, since the cleaning liquid flows from the cylinder chamber 22 to the storage chamber 32, even if dirt is attached to the storage chamber 32, the dirt dissolves in the cleaning liquid and is discharged without entering the cylinder chamber 22. Is done.

  Further, the packing 23 is structurally susceptible to dirt and easily propagates germs. However, since the cleaning liquid distributed in contact with the packing 23 is discharged from the storage chamber 32, the dirt does not flow back to the cylinder chamber 22. . In this embodiment, since the cleaning liquid flows exclusively from the cylinder head 21a and is discharged from the storage chamber 32, it is easy to keep the inside of the cylinder chamber 22, which is an important part where the raw material is pressurized, clean.

  A part of the cleaning liquid supplied from the suction port 61 does not flow into the cylinder chamber 22 but is discharged from the discharge port 62 through the second check valve 72.

  In the sterilization process, when the piston pump 10 of this embodiment is sterilized with steam, the plunger 11 is retracted until it is drawn into the storage chamber 32 as described above. Next, steam at 121 ° C. or higher (gauge pressure: 0.12 MPa or higher) is supplied from the suction port 61. The supplied vapor flows into the cylinder chamber 22, contacts the packing 23, and flows into the storage chamber 32, similar to the cleaning liquid. The condensed condensed water is discharged from the discharge port 62 or the discharge port 33. When the inside of the apparatus is filled with steam at 121 ° C. or higher, the temperature detection means provided at the discharge port 33 indicates 121 ° C. or higher. Sterilization is continued until the temperature detection means provided at the outlet 33 shows 121 ° C. or higher continuously for at least 15 minutes or longer as described in the Japanese Pharmacopoeia.

  When the process proceeds to the raw material treatment process after the cleaning or sterilization process, the hydraulic device 50 supplies hydraulic oil to the first chamber 43a. When the plunger 11 moves forward from the last retracted position, passes through the bottom dead center, and reaches the top dead center (FIG. 4A), the sensor 34a detects the piston shaft 45. At that time, the hydraulic device 50 switches the hydraulic oil supply to the second chamber 43b side. Then, the plunger 11 starts moving backward, the raw material is supplied from the raw material tank container 91, and the pressurizing operation is started.

  With reference to FIG. 2, the raw material processing apparatus 90 which is the atomization apparatus or emulsification apparatus using the above-mentioned piston pump 10 is demonstrated. The raw material processing apparatus 90 includes a raw material container 91, a piston pump 10, a chamber 92, a heat exchanger 93, a steam generator 94, and a cleaning liquid injector 95. The raw material container 91 has a cup shape and has a raw material discharge port 91 a at the bottom of the container, and the raw material discharge port 91 a and the suction port 61 are connected by a pipe 96. The pipe 96 is provided with a branch port 96a. The branch port 96a is always sealed with a plug. At the time of stationary cleaning, a cleaning liquid injection device 95 is connected to the branch port 96a. Further, during stationary sterilization, a steam generator 94 is connected to the branch port 96a. The discharge port 62 communicates with the inlet 92 a of the chamber 92. In the raw material processing step, the raw material pressurized to a high pressure by the piston pump 10 becomes a jet in the chamber 92 and collides with a ball (not shown). When the raw material jet collides with the ball, the particles contained in the raw material are atomized or the raw material is emulsified. As the chamber 92, a known chamber, for example, a chamber described in Japanese Patent No. 3151706, Japanese Patent No. 3686528, or the like can be applied. The processed raw material discharged from the chamber outlet 92 b is cooled by the heat exchanger 93 and returned to the raw material container 91. As the heat exchanger 93, for example, a double-pipe countercurrent heat exchanger is used. By using a double tube heat exchanger, the area of the heat exchanger wall surface with which the processed raw material comes into contact can be reduced. Moreover, since the raw material wetted surface on the inner surface of the heat exchanger is smooth and simple, it is easy to keep the heat exchanger clean. Moreover, it can be easily sterilized by steam. By the raw material processing apparatus 90 having the above-described configuration, it is possible to satisfactorily perform continuous repetitive processing of raw materials.

  The branch port 96a may be replaced with a three-way valve. Instead of sealing the branch port with a plug, a needle valve may be provided, and the branch port 96a may be connected to the steam generating device 94 or the cleaning liquid injection device 95 via the needle valve.

  Further, the raw material processing apparatus using the piston pump 10 may be configured to atomize or emulsify the raw material using two piston pumps that alternately perform compression operations. For example, it is performed by pressurizing the raw material to a high pressure of 100 MPa to 245 MPa with each piston pump and alternately injecting it in the chamber 92. The raw material injected in the chamber 92 is sent to the heat exchanger 93 and cooled, and when the raw material reaches a desired state (particle size, viscosity, etc.), it is recovered thereafter. If the raw material does not reach the desired state, the raw material is sent to the piston pump 10 again. In this configuration, more efficient raw material processing can be performed.

  The piston pump in this embodiment is suitable as a pump that pressurizes the raw material to 100 MPa to 245 MPa in a high-pressure injection type atomizer or emulsifier. In particular, it is suitable when the frequency of sterilization of the manufacturing apparatus is high in industries such as food, pharmaceuticals, and cosmetics.

  For example, when titanium oxide used for foundation and sunscreen is passed 10 times at 245 MPa, the median diameter of 2 μm is atomized to 0.065 μm. If it is a conventional size, it will become white when stretched on the skin, which is unnatural. When 10 passes of magnesium hydroxide used for laxative (laxative) and antacid (gastric acid neutralization) at 245 MPa, the median diameter, which was 4.5 μm, is atomized to 0.25 μm. Since the specific surface area of the particles is increased by atomization, the amount used can be reduced and the same medicinal effect as before can be obtained.

DESCRIPTION OF SYMBOLS 10 Piston pump 11 Plunger 12 Plunger guide 12a Through hole 12b Substantially conical surface 13 Clamping device 14 Stand 15 Cooling piping 20 Coolant discharge port 21 Raw material compression cylinder 21a Cylinder head 21b First flange portion 21c Insertion portion 22 Cylinder chamber 22b Packing storage portion 23 Packing 30 Discharge flow path 31 Storage chamber member 31c Concave receiving portion 31d Second flange portion 32 Storage chamber 33 Discharge port 34, 34a, 34b, 34c Sensor 36 Third check valve 37 Steam drain 38, 39 Temperature Total 40 Linear drive device 41 Cylinder member 42 Piston 43a First chamber 43b Second chamber 44 Hydraulic oil supply / discharge port 45 Piston shaft 46 Drive cylinder 50 Hydraulic device (working fluid supply means)
61 Suction port 62 Discharge port 63 Suction channel 64 Discharge channel 71 First check valve 72 Second check valve 73 Valve body 74 Valve seat 90 Material processing device 91 Material container 92 Chamber 93 Heat exchanger 94 Steam generation Equipment 95 Cleaning liquid injection equipment H Horizontal axis X Center axis of cylinder for raw material compression

Claims (11)

A piston pump that pressurizes and feeds raw materials,
A raw material compression cylinder having a cylinder chamber with an open rear end;
A plunger penetrating from the rear end portion into the cylinder chamber in a liquid-tight state and reciprocating between a top dead center and a bottom dead center for feeding the raw material;
The raw material compression cylinder is supported and fixed in a substantially horizontal inclined state with a slight inclination angle so that the central axis along the reciprocating direction of the plunger is the lower side of the gravity direction of the cylinder. Stand,
Concentrically connected to the rear end portion of the raw material compression cylinder and having a cylindrical space having a diameter larger than that of the cylinder chamber, a storage chamber for receiving the plunger, and a drain for discharging the fluid in the storage chamber. A hollow cylindrical storage chamber member having an outlet;
A linear drive device that has a reciprocating member that linearly reciprocates in parallel with the plunger with a stroke longer than the distance between the top dead center and the bottom dead center of the plunger, and that reciprocates the plunger through the reciprocating member; ,
A suction port which is disposed upward in the direction of gravity at the head of the raw material compression cylinder and communicates with a raw material supply source, a cleaning liquid supply source and a steam supply source in a switchable manner;
A suction flow path communicating the suction port with the cylinder chamber;
A discharge port disposed downward in the direction of gravity at the head of the raw material compression cylinder;
A discharge passage communicating the discharge port with the cylinder chamber;
A first check valve disposed in the suction flow path;
A second check valve disposed in the discharge flow path;
With
When the reciprocating member of the linear drive device moves to the final end of the stroke, the storage chamber member is pulled into the storage chamber and a communication state between the cylinder chamber and the storage chamber is obtained. , Piston pump.   2. The piston pump according to claim 1, wherein the inclination angle is not less than 0.5 degrees and less than 5 degrees. The piston pump according to claim 1 or 2, wherein the linear drive device is:
A cylinder member coaxially connected to a rear portion of the accommodation chamber member; and the reciprocating member, which is slidably provided in the cylinder member, and the internal space of the cylinder member is defined as a first chamber and a second chamber. A piston that divides into a chamber and reciprocates in the cylinder member, and a piston shaft that is fixed to the piston at a rear end side and that has a distal end side that holds the plunger and linearly drives from the inside of the cylinder member to the accommodation chamber. A drive cylinder;
A piston pump comprising: a working fluid supply means that controls switching of supply and discharge of the working fluid to and from the first chamber and the second chamber to drive and control the reciprocation of the piston. The piston pump according to any one of claims 1 to 3,
A piston pump comprising connecting means for releasably connecting a rear end portion of the raw material compression cylinder and a front end portion of the storage chamber member. 5. The piston pump according to claim 4, wherein the connecting means is
An insertion portion extending in a cylindrical shape from the rear side of the raw material compression cylinder, and a first flange portion protruding on the outer periphery at a position on the front side of the insertion portion,
A concave receiving portion that is provided at a front end portion of the storage chamber member and receives and fits the insertion portion, and protrudes on an opening edge circumference of the receiving portion, and the first insertion portion is in a fitted state of the insertion portion. A second flange portion having a front plane that is in contact with the rear plane of the flange portion;
A piston pump comprising: a clamp device that sandwiches the first flange portion and the second flange portion and couples the raw material compression cylinder and the storage chamber member. The piston pump according to any one of claims 1 to 5,
The said discharge port is a piston pump provided in the gravity direction lower side of the said storage chamber, and the edge part near the cylinder for raw material compression of the said storage chamber. The piston pump according to any one of claims 1 to 6,
A piston pump further comprising a third check valve that is disposed in a discharge flow path that communicates with the discharge port and prevents a back flow of fluid toward the storage chamber. The piston pump according to any one of claims 1 to 7,
Between the open end of the cylinder chamber of the raw material compression cylinder and the storage chamber, there is provided a plunger guide having an inner diameter that increases toward the storage chamber and a through hole through which the plunger can pass. Piston pump. The piston pump according to any one of claims 1 to 8,
A branch port provided in the middle of the pipe communicating from the outside to the suction port;
A steam drain provided in communication with a discharge flow path from the discharge port;
Further equipped with a piston pump. The piston pump according to any one of claims 1 to 9, wherein the first check valve is
A valve body that is a sphere,
Super engineering plastic valve seats,
A piston pump comprising: a spring that urges the valve body against the valve seat to seal the raw material and sets a cracking pressure of the first check valve to 0.003 to 0.02 MPa. A raw material processing apparatus,
The piston pump according to any one of claims 1 to 9,
A raw material container for storing the raw material ;
A suction pipe communicating the raw material container and the suction port;
A raw material processing apparatus.

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