JP7260902B2 - liquid pumping device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid pumping device for pressurizing a liquid stored in a container with a driving fluid that has flowed into the container and discharging the liquid out of the container.

2. Description of the Related Art There is a liquid pumping device that pressurizes a liquid stored in a container using steam or compressed air as a driving fluid and discharges the liquid out of the container (for example, Patent Document 1). A pumping device such as that disclosed in Patent Document 1 is called a pumping trap, and is a mechanical pump that does not require electricity. Pumping traps do not require electricity, so they have the advantage of being applicable, for example, to areas where power supply is difficult.

JP 2014-029187 A

However, when steam is used as the driving fluid, the steam contacts the liquid stored in the container and is condensed, so it takes more time to increase the pressure inside the container than when compressed air is used, and the pumped flow rate is reduced. In Patent Literature 1, a plate member is attached to the inside of the container, and the plate member is arranged above the liquid surface to prevent steam from directly hitting the liquid surface, thereby suppressing the progress of condensation. However, it is impossible to provide the plate member above the entire liquid surface, and a portion of the steam hits the liquid surface directly.

The present invention provides a liquid pumping device that can reduce the amount of condensation of steam, shorten the pressure rise time in a container, and increase the pumping flow rate by completely preventing steam from directly hitting the liquid surface. It is intended to

In order to achieve the above object, a liquid pressure-feeding device according to the present invention is a liquid pressure-feeding device for pressurizing a liquid stored in a container with a driving fluid flowed into the container and discharging the liquid outside the container. a driving fluid inlet for allowing the driving fluid to flow into the container; a driving fluid outlet for discharging the driving fluid in the container to the outside of the container; a valve body for opening and closing the driving fluid inlet; A float for detecting the liquid level of the liquid stored in the container, an operating member for operating the valve element based on the liquid level detected by the float, and a flow direction of the driving fluid flowing in from the driving fluid inlet. and an adjusting member for preventing the driving fluid from directly going to the lower liquid surface, the adjusting member being configured to allow the driving fluid to flow downward from the driving fluid inlet through the perimeter of the actuating member. It has a receiving portion that prevents the driving fluid from moving toward the driving fluid, and a scattering prevention portion that prevents the driving fluid from scattering in the horizontal direction and guides the driving fluid upward.

According to this configuration, the scattering prevention portion of the adjustment member prevents the driving fluid from scattering in the horizontal direction and guides the driving fluid upward. Further, the receiving portion of the adjustment member can prevent the driving fluid from flowing downward from the driving fluid inlet through the perimeter of the actuating member. Therefore, it is possible to completely prevent the drive fluid from directly hitting the liquid surface. As a result, even when steam is used as the driving fluid, it is possible to suppress the condensation amount of the steam, shorten the pressure rise time in the container, and increase the pumping flow rate.

In the present invention, the adjustment member may have a bottom wall that constitutes the receiving portion, and a peripheral wall that constitutes the scattering prevention portion rising from the outer periphery of the bottom wall. The adjustment member is, for example, a bottomed cylindrical spacer member. According to this configuration, the adjustment member can be realized with a simple configuration.

In this case, it further comprises a cylindrical valve seat member attached to the container and on which the valve body is seated, and a plurality of outlets formed in the valve seat member, wherein the outlets correspond to the valve seat member. may be spaced apart in the circumferential direction of and opposed to the peripheral wall. According to this configuration, it is possible to effectively prevent the driving fluid from scattering in the horizontal direction from the lead-out hole.

In this case, the adjustment member is placed on a step portion provided on the valve seat member so as to protrude radially outward, and the stop ring attached to the valve seat member allows the adjustment member to be disengaged upward. may be prevented. According to this configuration, by attaching the valve seat member to the container, the adjustment member can also be attached to the container via the valve seat member, which facilitates assembly.

According to the liquid pumping device of the present invention, by completely preventing vapor from directly hitting the liquid surface, the amount of vapor condensation can be suppressed, the pressure rise time in the container can be shortened, and the pumping flow rate can be increased. can.

1 is a schematic configuration diagram showing a liquid pumping device according to a first embodiment of the present invention; FIG. It is a schematic block diagram which shows the state different from FIG. 1 of the same pumping apparatus. It is a longitudinal cross-sectional view which shows the same pumping apparatus. It is a longitudinal cross-sectional view which shows the drive valve of the same pressure-feeding apparatus. FIG. 5 is a vertical cross-sectional view showing a state of the driven valve different from that in FIG. 4 ; It is an exploded view showing a drive valve and an adjustment member of the pressure-feeding device.

Preferred embodiments of the present invention will be described below with reference to the drawings. 1 and 2 are schematic configuration diagrams showing a liquid pumping apparatus according to a first embodiment of the present invention. The pumping device 1 pressurizes the liquid W stored in the container 2 by the driving fluid F flowed into the container 2 and discharges the liquid W to the outside of the container 2 . 1 shows the state in which the liquid W is flowing in, and FIG. 2 shows the state in which the liquid W is discharged. The liquid W in this embodiment is water, in particular condensate from steam pipes, steam equipment and the like. Further, the driving fluid F in this embodiment is steam.

The container 2 is provided with a liquid inlet 4 through which the liquid W flows and a liquid outlet 6 through which the liquid W flows out. A liquid inflow passage 8 is connected to the liquid inflow port 4 , and a liquid outflow passage 10 is connected to the liquid outflow port 6 . An inflow side check valve 12 is connected between the liquid inflow port 4 and the liquid inflow passage 8 , and an outflow side check valve 14 is connected between the liquid outflow port 6 and the liquid outflow passage 10 .

At the top of the container 2, a driving fluid inlet 16 for allowing the driving fluid F to flow into the container 2 and a driving fluid outlet 18 for discharging the driving fluid F from the container 2 to the outside of the container 2 are provided. A driving fluid inflow passage 17 is connected to the driving fluid inflow port 16 , and a driving fluid outflow passage 19 is connected to the driving fluid outflow port 18 . The pumping device 1 has a driving valve 20 that opens and closes the driving fluid inlet 16 and a discharge valve 22 that opens and closes the driving fluid outlet 18 .

A float 24 for detecting the liquid level WL of the liquid W stored in the container 2 is accommodated inside the container 2 . Drive valve 20 and discharge valve 22 are connected to float 24 via actuation member 26 . The actuating member 26 has a known structure, and consists of a plurality of link members 26a and a single spring member 26b that are rotatably connected to each other. The operating member 26 operates the drive valve 20 and the discharge valve 22 based on the liquid level WL detected at the float 24 by a known mechanism.

When the liquid level WL shown in FIG. 1 is low, the float 24 floating on the liquid W is also at a low position. At this time, the operation of the operating member 26 causes the drive valve 20 to close and the discharge valve 22 to open. That is, the inflow of the driving fluid F into the container 2 is blocked, and the internal space of the container 2 is open to the atmosphere. When the liquid level WL is low, the pressure inside the container 2 is low. On the other hand, since the pressure inside the container 2 is low, the outflow side check valve 14 is closed.

When the liquid W flows into the container 2, the liquid level WL rises, and the float 24 also rises accordingly. When the liquid level WL exceeds a specified value, as shown in FIG. 2, the actuation member 26 operates to open the drive valve 20 and close the discharge valve 22 . That is, the driving fluid F flows into the container 2, and the discharge of the driving fluid F from the container 2 to the outside is prevented. As a result, the pressure inside the container 2 increases, so that the liquid W in the container 2 opens the outflow side check valve 14 and is discharged from the liquid outflow port 6 through the liquid outflow passage 10 to the outside of the container 2. . On the other hand, since the pressure inside the container 2 is high, the inflow side check valve 12 is closed.

When the liquid W is discharged out of the container 2, the liquid level WL drops. Along with this, the float 24 also descends and returns to the state shown in FIG. Thereafter, the state of FIG. 1 and the state of FIG. 2 are repeated, and the liquid W is pressure-fed.

Next, details of the driven valve 20 will be described with reference to FIGS. Since the structure of the exhaust valve 22 (FIG. 1) is the same as a known one, its explanation is omitted. As shown in FIG. 3, an operating member 26 is detachably attached to the inner surface of the container 2 with bolts (not shown). A float 24 is attached to one end of the actuating member 26 . That is, the float 24 is supported by the container 2 via the actuation member 26 . On the other hand, a motive pin 28 is provided at the other end of the operating member 26 .

As shown in FIG. 4 , the motive pin 28 has a cylindrical mounting portion 30 and an operating pin portion 32 projecting upward from the mounting portion 30 . A female thread 30a is formed inside the mounting portion 30, and the other end of the operating member 26 is screwed into the female thread 30a. The operating pin portion 32 includes a large-diameter portion 32a projecting upward from the mounting portion 30, a diameter-changing portion 32b whose diameter gradually decreases upward from the large-diameter portion 32a, and an upper end of the diameter-changing portion 32b extending upward. and a small diameter portion 32c. Thus, the diameter of the motive pin 28 decreases in the order of the mounting portion 30, the large diameter portion 32a of the operating pin portion 32, and the small diameter portion 32c of the operating pin portion 32. As shown in FIG.

The driven valve 20 has a valve seat member 34 attached to the container 2 and a valve body 36 seated on the valve seat member 34 . The valve seat member 34 of this embodiment is cylindrical and has a valve seat mounting portion 38, a discharge portion 40, and a stopper portion 42 from above. In this embodiment, the valve seat mounting portion 38, the discharge portion 40 and the stopper portion 42 are integrally formed.

The valve seat mounting portion 38 has a cylindrical shape, and a male thread 38a is formed on the outer circumference thereof. The drive valve 20 is detachably attached to the container 2 by screwing the male screw 38 a into the female screw 35 formed on the container 2 . A hollow portion 34 a of the valve seat member 34 communicates with the driving fluid inlet 16 .

The upper surface of the valve seat mounting portion 38 constitutes a valve seat portion on which the valve body 36 is seated. The valve body 36 is a spherical body having a larger diameter than the outer diameter of the hollow portion 34a. Therefore, in the state (closed state) in which the valve body 36 of FIG. 5 is seated, the driving fluid F is prevented from flowing into the hollow portion 34a. On the other hand, when the valve body 36 in FIG. 4 is separated from the valve seat (open state), the driving fluid F flows into the hollow portion 34a. Thus, the valve body 36 opens and closes the drive fluid outlet 16 .

The discharge portion 40 is connected downward from the valve seat mounting portion 38 and has a cylindrical shape with a larger diameter than the valve seat mounting portion 38 . A plurality of outlet ports 40a that are open in the radial direction are formed in the peripheral wall of the discharge portion 40 . The lead-out port 40a allows the inside of the valve seat member 34 and the internal space of the container 2 to communicate with each other. In this embodiment, six outlets 40a are provided at intervals in the circumferential direction, but the number of outlets 40a is not limited to this.

The stopper portion 42 is connected downward from the discharge portion 40 and protrudes radially outward from the discharge portion 40 . The stopper portion 42 of the present embodiment has a hexagonal nut shape with a diameter larger than that of the discharge portion 40 . Here, “the stopper portion 42 has a larger diameter than the discharge portion 40 ” means that the circumscribed circle of the outer peripheral surface of the stopper portion 42 has a larger diameter than the discharge portion 40 . Since the stopper portion 42 has a larger diameter than the discharge portion 40 in this manner, a stepped portion 44 is formed between the stopper portion 42 and the discharge portion 40 . The step portion 44 is provided so as to protrude radially outward from the discharge portion 40 . An annular groove 46 is formed between the discharge port 40 a and the stepped portion 44 in the peripheral wall of the discharge portion 40 .

The liquid pumping device 1 further comprises an adjustment member 50 . The adjustment member 50 adjusts the flow direction of the driving fluid F that has flowed in from the driving fluid inlet 16, and prevents the driving fluid F from directly going toward the lower liquid surface WL. The adjusting member 50 of this embodiment is a bottomed cylindrical spacer member. Specifically, the adjustment member 50 has a bottom wall 52 and a peripheral wall 54 rising from the outer circumference of the bottom wall 52 . A through hole 52 a is formed in the bottom wall 52 .

The diameter of the through hole 52 a of the adjusting member 50 is slightly larger than the outer diameter of the discharge portion 40 of the valve seat member 34 and smaller than the outer diameter of the stopper portion 42 of the valve seat member 34 . Therefore, the adjustment member 50 is placed on the stepped portion 44 of the valve seat member 34 . A stop ring 56 is also attached to the groove 46 of the valve seat member 34 . This prevents the adjustment member 50 from coming off upward. The retaining ring 56 is, for example, a C-shaped retaining ring. Thus, the adjustment member 50 is retained between the shoulder 44 of the valve seat member 34 and the retaining ring 56 .

The height of the peripheral wall 54 is set so that the upper end of the peripheral wall 54 is located above the upper edge of the lead-out port 40a when the adjustment member 50 is held by the valve seat member 34 . That is, each outlet 40 a faces the peripheral wall 54 . Specifically, in this embodiment, the axis of the outlet 40 a is perpendicular to the wall surface of the peripheral wall 54 . The upper end of the peripheral wall 54 may be positioned at or slightly below the upper edge of the outlet 40a.

Next, procedures for assembling the drive valve 20 and the adjusting member 50 and attaching them to the container 2 will be described with reference to FIGS. First, the valve seat member 34 is inserted into the through hole 52a of the adjusting member 50 from below, as indicated by an arrow A1 in FIG. The diameter of the through hole 52 a of the adjusting member 50 is slightly larger than the outer diameter of the discharge portion 40 of the valve seat member 34 and smaller than the outer diameter of the stopper portion 42 . is placed. In this state, the retaining ring 56 is attached to the groove 46 of the valve seat member 34 . As described above, the adjustment member 50 is held by the valve seat member 34, and a sub-assembly including the adjustment member 50 and the valve seat member 34 is constructed.

Next, this sub-assembly is attached to the container 2 . Specifically, as shown in FIG. 5 , the male thread 38 a of the valve seat mounting portion 38 of the valve seat member 34 is tightened to the female thread 35 formed in the container 2 . The sub-assembly is thereby attached to the container 2 . Furthermore, the valve body 36 is seated on the upper surface of the valve seat member 34 . As described above, the drive valve 20 and the adjustment member 50 are mounted on the container 2 .

Next, the motive pin 28 is inserted into the valve seat member 34 . Specifically, the actuating pin portion 32 of the motive pin 28 is inserted into the hollow portion 34a of the valve seat member 34. As shown in FIG. The outer diameter of the large diameter portion 32a of the operating pin portion 32 is slightly smaller than the inner diameter of the hollow portion 34a of the valve seat member 34, and the outer diameter of the small diameter portion 32c of the operating pin portion 32 is the inner diameter of the hollow portion 34a of the valve seat member 34. sufficiently smaller than

In the valve open state of FIG. 4, the upper end of the large diameter portion 32a of the actuating pin portion 32 is set to be approximately the same height as the lower edge of the lead-out port 40a in the hollow portion 34a of the valve seat member 34. As shown in FIG. On the other hand, the small diameter portion 32c of the operating pin portion 32 is located in the hollow portion 34a of the valve seat mounting portion 38 of the valve seat member 34 and the hollow portion 34a of the upper portion of the discharge portion 40. As shown in FIG.

Therefore, between the small diameter portion 32c of the operating pin portion 32 and the hollow portion 34a of the valve seat member 34, a passage through which the driving fluid F flows is formed. On the other hand, since the gap between the large diameter portion 32a of the operating pin portion 32 and the hollow portion 34a of the valve seat member 34 is extremely small, the driving fluid F does not flow. Further, the outer diameter of the mounting portion 30 of the motive pin 28 is larger than the inner diameter of the hollow portion 34a of the valve seat member 34. As shown in FIG. Therefore, when the valve is opened as shown in FIG. 4, the upper surface of the mounting portion 30 of the motive pin 28 contacts the lower surface of the stopper portion 42 of the valve seat member 34. As shown in FIG. As a result, the upper limit of the motive pin 28 is defined, and leakage of the driving fluid F from the hollow portion 34a of the valve seat member 34 can be prevented.

Next, the operation of the driven valve 20 and the action of the adjustment member 50 of this embodiment will be described. When the liquid level WL in the container 2 rises as shown in FIG. 2, the float 24 and the operating member 26 cause the motive pin 28 shown in FIG. In this state, the drive fluid F from the drive fluid inlet 16 flows into the hollow portion 34 a of the valve seat member 34 .

The driving fluid F that has flowed into the hollow portion 34a flows downward around the motive pin 28, which is the working member 26, and is discharged radially (horizontally) from the outlet 40a. At this time, the driving fluid F discharged horizontally from the discharge port 40 a collides with the peripheral wall 54 of the adjusting member 50 . The bottom wall 52 of the adjusting member 50 prevents the driving fluid F that has collided with the peripheral wall 54 from passing around the motive pin 28 (actuating member 26) and the valve seat member 34 toward the liquid surface WL below. That is, the bottom wall 52 of the adjusting member 50 constitutes a receiving portion that prevents the driving fluid F from passing around the operating member 26 downward.

The driving fluid F that collides with the peripheral wall 54 is prevented from scattering in the horizontal direction by the peripheral wall 54 and is guided upward along the peripheral wall 54 . In other words, the peripheral wall 54 of the adjusting member 50 prevents the driving fluid F from scattering in the horizontal direction, and constitutes a scattering prevention portion that guides the driving fluid F upward. The driving fluid F guided upward along the peripheral wall 54 goes to the upper space inside the container 2 without going to the liquid surface WL.

When the liquid level WL in the container 2 becomes low as shown in FIG. 1, the float 24 and the operating member 26 move the motive pin 28 shown in FIG. (The valve is closed). In this state, the driving fluid F from the driving fluid inlet 16 does not flow into the container 2 . Thereafter, the valve open state (FIG. 4) and the valve closed state (FIG. 5) are repeated according to fluctuations in the liquid level WL.

According to the above configuration, the peripheral wall 54 (splash prevention portion) of the adjustment member 50 shown in FIG. 4 prevents the driving fluid F from scattering in the horizontal direction and guides the driving fluid F upward. Further, the bottom wall 52 (receiving portion) of the adjustment member can prevent the driving fluid F from passing downward around the actuating member 26 . Therefore, it is possible to completely prevent the drive fluid F from directly hitting the liquid surface WL. As a result, even when steam is used as the driving fluid F, the condensation amount of the steam can be suppressed, the pressure rise time in the container 2 can be shortened, and the pumped flow rate can be increased.

Further, since the adjusting member 50 is composed of a bottomed cylindrical spacer member, the structure is also simple. Furthermore, since the outlet port 40a of the valve seat member 34 faces the peripheral wall 54, it is possible to effectively prevent the driving fluid F from scattering in the horizontal direction from the outlet hole 40a.

An adjusting member 50 is retained between the stepped portion 44 of the valve seat member 34 and the stop ring 46 . Therefore, by attaching the valve seat member 34 to the container 2, the adjusting member 50 can also be attached to the container 2 via the valve seat member 34, which facilitates assembly.

The present invention is not limited to the above embodiments, and various additions, changes, or deletions are possible without departing from the scope of the present invention. For example, in the above-described embodiment, the adjusting member 50 is configured by a bottomed cylindrical spacer member, the bottom wall 52 of the adjusting member 50 constitutes the receiving portion, and the peripheral wall 54 of the adjusting member 50 constitutes the scattering preventing portion. However, the configurations of the adjusting member 50, the receiving portion, and the anti-scattering portion are not limited to these. Accordingly, such are also included within the scope of this invention.

1 liquid pumping device 2 container 16 driving fluid inlet 18 driving fluid outlet 24 float 26 operating member 34 valve seat member 36 valve body 40a outlet 44 stepped portion 50 adjusting member 52 bottom wall (receiving portion)
54 peripheral wall (scattering prevention part)
56 retaining ring F driving fluid W liquid

Claims (2)

A liquid pumping device for pressurizing a liquid stored in a container by a driving fluid flowed into the container and discharging the liquid outside the container,
a driving fluid inlet for flowing a driving fluid into the container;
a driving fluid outlet for discharging the driving fluid in the container to the outside of the container;
a valve body that opens and closes the driving fluid inlet;
a float for detecting the liquid level of the liquid stored in the container;
an actuating member that actuates the valve element based on the liquid level detected by the float;
an adjustment member that adjusts the flow direction of the driving fluid that has flowed in from the driving fluid inlet to prevent the driving fluid from flowing directly toward the liquid surface below;
The adjusting member includes a receiving portion that prevents the driving fluid from flowing downward through the periphery of the operating member from the driving fluid inlet, and a receiving portion that prevents the driving fluid from scattering in the horizontal direction. and a scattering prevention part that guides the fluid upward,
The adjustment member has a bottom wall that constitutes the receiving portion, and a peripheral wall that constitutes the scattering prevention portion rising from the outer periphery of the bottom wall,
a tubular valve seat member attached to the container and on which the valve body is seated;
a plurality of outlets formed in the valve seat member,
A pumping device for liquid in which the outlet ports are spaced apart in the circumferential direction of the valve seat member and face the peripheral wall . 2. The liquid pumping device according to claim 1 , wherein the adjustment member is mounted on a step portion provided on the valve seat member so as to protrude radially outward,
A liquid pressure-feeding device in which the adjustment member is prevented from coming off upward by a retaining ring attached to the valve seat member.

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