JPH09222177A - Pressure adjusting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a core wire from being twisted by a method wherein a holding member for fixing the core wire to adjust pressure of fluid, a connecting member capable of drawing the holding member along with a refraction of a spacer and a feeder screw for threadably engaging with the spacer are provided. SOLUTION: As a feeder screw 6 is rotated in a rightward direction with a force applied from outside of a casing, a spacer 4 advances and in turn when the screw is rotated in a leftward direction, the spacer 4 is retracted. As the spacer 4 advances forward, the spacer 4 advances the core wire 2 and the holding member 3 while their contacted surface being pushed by it. With such an arrangement as above, the core wire 2 advances in a feeding-in pipe and a feeding-out pipe. As the spacer 4 is retracted, a first engaging end 5a and a second engaging end 5b are engaged to each other, a third engaging end 5c and the holding member 3 are engaged to each other, and the core wire 2 and the holding member 3 are retracted as the spacer 4 is retracted. With such an arrangement as above, the core wire 2 is retracted within the feeding-in pipe and the feeding-out pipe. The connecting member 5 is a cylindrical member which encloses the feeding screw 6 and has a through-pass hole through which the feeding screw 6 may pass.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention can be used in, for example, a sampling device for water quality adjustment used in a power plant, a boiler plant, etc., and particularly adjusts the pressure of high-pressure sample water in this type of device. The present invention relates to a pressure adjusting device, and more particularly, to a pressure adjusting device that can prevent damage to a core wire and that has few failures.

[0002]

2. Description of the Related Art Generally, it is known that a boiler plant is provided with a sampling device for collecting water for boiler, measuring the quality of the water, and monitoring the quality of the water in order to prevent troubles caused by the water for boiler. . However, in the sampling device, it is important to supply high-pressure boiler water (sample water) at a constant amount and a constant pressure regardless of fluctuations in the boiler pressure. Therefore, in this sampling device, a pressure adjusting device for adjusting the pressure of so-called high-pressure sample water is usually provided. The structure of such a conventional pressure adjusting device is, for example, as shown in FIG.

As shown in FIG. 2, the pressure adjusting device 100 is connected to the introduction pipe 101 that is a fluid introduction passage, the discharge pipe 103 that is a fluid discharge passage, and the introduction pipes 101 and 103. The cylinder 108 is The cylinder 108 has a core wire 105 and a feed screw 1
06, a holding member 107 such as a nut, and a cylinder 108. The feed screw 106 and a holding member 107 that is screwed into the feed screw 106 are built in the cylinder 108. One end portion of the core wire 105 is fixed to the holding member 107, and the other end portion is inserted into the introduction pipe 101 and the extraction pipe 103. The feed screw 106 is connected to a rotary gear or a handle 109 at one end outside the cylinder 108. The rotary gear is connected to a rotary shaft of a motor (not shown), and the handle 109 is manually rotatably connected. When the rotary gear or the handle 109 rotates, the feed screw 106 rotates and the holding member 1
07 moves forward or backward in the axial direction. With the movement of the holding member 107, the core wire 105 advances or retracts the introduction pipe and the extraction pipe.

According to the pressure adjusting device thus constructed, the high-pressure sample water collected from the boiler plant or the like is introduced from the introduction port 102 to the introduction pipe 101 and the cylinder 108.
While flowing through the inside of the pipe and the outlet pipe 103 to the outlet 104, the holding member 107 moves in the axial direction by the rotation of the feed screw 106, and the core wire 105 also moves in the inlet pipe 101 and the outlet pipe 103 in the axial direction. Moving. In other words, the core wire 105 moves forward or backward according to the rotation direction of the feed screw 106. As a result, the pressure of the sample water can be reduced and adjusted to a predetermined value. Therefore,
The decompressed sample water supplied from the outlet 104 to a measuring device (not shown) can be constantly adjusted to a constant amount and a constant pressure.

However, the conventional pressure adjusting device has the following drawbacks.

Iron oxide, dust, or the like in the sample water adheres to the threads of the feed screw, which causes the holding member to solidify, and the core wire is twisted as the holding member rotates as the feed screw rotates. That is, when the lead screw rotates,
The holding member may also rotate with this rotation, and at this time, there was a problem that the core wire was twisted or damaged.

Therefore, in order to improve the performance of the device, it has been desired to eliminate the above drawbacks.

[0008]

SUMMARY OF THE INVENTION An object of the present invention is to provide a pressure adjusting device which can prevent the twisting of the core wire and which has few failures.

[0009]

According to a first aspect of the present invention for solving the above-mentioned problems, a core wire for adjusting a fluid pressure by being inserted into and removed from an introduction passage and a discharge passage is fixed to the core wire. A holding member; a spacer capable of pressing the holding member; a linking member capable of indexing the holding member as the spacer retracts; and a feed screw for screwing the spacer together. The pressure adjusting device according to claim 2, wherein the holding member includes a core wire mounting through hole and a feed screw mounting hole. It is a device.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION A preferred pressure adjusting device according to the present invention comprises an inlet passage, an outlet passage, a housing containing a core wire, a holding member, a spacer and a linking member, and a feed housed in the housing. With screws.

A suitable introducing passage is formed so that a fluid can be introduced into the housing from an external fluid supply portion for supplying the fluid to the introducing passage. A preferable introduction path is a tube or an introduction tube or a hole or an introduction hole which is capable of introducing a fluid into the housing from an external fluid supply unit and into which the core wire can be inserted. A more preferable introduction path is a cylindrical tube or a circular introduction tube or a hole or a circular introduction hole that can introduce a fluid into the housing from an external fluid supply unit and into which one end portion of the core wire can be inserted. is there.

The lead-out path is formed so that the fluid can be led out from the inside of the casing. A suitable lead-out path is a pipe or lead-out tube or a hole or lead-out hole formed so that the fluid can be led to the outside from the inside of the housing and the core wire can be inserted therein. A more preferable outlet path is a cylindrical tube, that is, a circular inlet tube or a hole, that is, a circular inlet hole, which allows fluid to be led to the outside from the inside of the housing and into which one end portion of the core wire can be inserted.

It is preferable that the introduction path and the discharge path are arranged in parallel with each other and are respectively coupled to the housing.

Examples of the fluid introduced into the introduction passage include gas, liquid, powder, suspension, emulsion and slurry. Among these, a suitable fluid is a liquid.

The casing includes a core wire, a holding member, a spacer,
It has a structure capable of incorporating a part of the link member and the feed screw.

A preferred housing has a core wire, a holding member, a spacer and a linking member built-in, and the feed screw is inserted through the housing.
It is formed so that a part of the feed screw is built in and a part of the feed screw is projected to the outside.

A preferred housing can incorporate a core wire, a holding member, a spacer and a linking member, has an insertion hole into which the feed screw can be inserted, and has the introduction path and the extraction path. It is a cylinder that is connected.

The core wire is inserted into the introduction path.
It comprises a core wire and a second core wire inserted into the lead-out path.
A suitable core wire has a first core wire inserted in the introduction path and a second core wire inserted in a lead-out path parallel to the introduction path, and is fixed to a holding member to be described later so as to respond to the movement of the holding member. It is formed so that it can move forward and backward.

The holding member can fix the core wire, is advanced by the advance of a spacer described later, and is formed so as to be able to move backward according to the backward movement of the spacer. Usually, such a holding member has a through hole for attaching a core wire,
And a lead screw mounting hole.

The core wire mounting through hole is formed so that the core wire can be mounted and the core wire can be fixed.

A suitable lead screw mounting hole is formed so that the lead screw can be inserted therethrough.

The spacer is screwed onto the feed screw,
It is formed so that the holding member is pushed and the spacer is advanced as the spacer itself is advanced by the rotation of the feed screw. A suitable spacer is screwed into a male screw formed on the outer periphery of the feed screw, comes into contact with the holding member, and the spacer itself moves forward by the rotation of the feed screw. The member is formed so that it can be pushed. More preferred spacers in contact to be the holding member and the disjunction at its distal end face, has a through hole having the inner peripheral surface of the female screw of the male screw and meshing of the feed screw, and the retaining member It is formed so that it can be pushed or pushed to move it forward. An even more preferable spacer has an engaging portion that contacts the distal end surface of the holding member at its distal end surface and engages with the linking member, and a through hole that meshes with the feed screw, The holding member is formed such that the member can move forward and the holding member can move backward via the linking member.

The linking member is formed so that the holding member can be retracted as the spacer is retracted.

A preferred linkage member is disposed inside the holding member and has a first locking portion for locking the holding member and a second locking portion for locking the engaging portion of the spacer. Have,
Further, the holding member is formed so that the holding member can be retracted as the spacer retracts, and the spacer can be advanced by advancing the spacer.

The feed screw is formed so that the spacer can be screwed. A suitable feed screw is a columnar screw provided with an engaging portion so that the spacer can be screwed.

In a more preferable pressure adjusting device, the housing is connected to the introduction passage and the discharge passage at the tip portion. A feed screw having a central axis common to the central axis is inserted through the housing. The feed screw extends from the rear end of the housing and is adapted to rotate by itself. The housing contains a core wire, a holding member, a spacer, and a linking member. The spacer is meshed with the feed screw and can be moved forward or backward by rotating the feed screw. Since the holding member fixes the core wire and is in contact with the spacer, the holding member is advanced as the spacer is advanced.

The linking member itself moves backward while being locked by the second locking portion when the spacer moves backward, and is further locked by the holding member and the first locking portion. The holding member is moved backward.

The core wire is arranged so that one end of each core wire can be inserted into the introduction path and the extraction path.

The pressure adjusting device of the present invention operates as follows.

Usually, the fluid supplied from the fluid supply unit installed outside the pressure adjusting device is introduced into the housing through the introduction passage. The introduced fluid passes through the outlet passage and flows out to the outside.

In the fluid introduced into the introduction passage, the pressure of the fluid introduced into the introduction passage is adjusted in this way by the forward movement and backward movement of the core wire inserted in the introduction passage. The core wire advances because the spacer, which advances when the feed screw rotates clockwise, pushes the holding member. Further, as the feed screw rotates counterclockwise, the spacer retracts while engaging the linking member at the second locking portion, so that the linking member also retracts while engaging the first locking portion of the holding member. The core wire is retracted by retracting the holding member.

[0032]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG.

In the following, a pressure adjusting device according to an embodiment of the present invention will be described by taking a liquid such as water as an example.

The pressure adjusting device 1 according to the present invention includes an introducing pipe (see FIG. 2).
The introduction pipe 101 is similar to that shown in FIG. Not shown in FIG. ) And the outlet pipe (the outlet pipe 103 is similar to that shown in FIG. 2. Not shown in FIG. 1), and the cylinder corresponding to the housing (similar to the cylinder 108 in FIG. 2). (Not shown), a rotary gear (similar to rotary gear 109 in FIG. 2, not shown in FIG. 1), and a motor or handle (similar to handle 109 in FIG. 2). (Not shown in).

The introduction pipe is the pressure adjusting device 1 of the present invention.
Is a thin tube capable of introducing a liquid supplied from a liquid supply device (not shown) installed outside the cylinder into the cylinder, one end of which is connected to the liquid supply device which is also the liquid supply unit, and the other end of which is It is arranged to be coupled to the cylinder.

The lead-out pipe is a thin pipe for leading the liquid introduced into the cylinder to a predetermined place outside, and is arranged so that one end thereof is connected to the predetermined place and the other end is connected to the cylinder. .

Inside the cylinder, the core wire 2, the holding member 3, the spacer 4, the linking member 5, and the feed screw 6 are provided.
There is.

The core wire 2 has a first core wire 2a inserted into the introduction pipe and a second core wire 2b inserted into the lead-out pipe. The first core wire 2a is a shaft body that can move forward or backward in the introduction pipe, one end of the shaft body is inserted into the introduction pipe, and the other end is built in the cylinder. The second core wire 2b is a shaft body that can move forward or backward in the lead-out pipe, one end of the shaft body is inserted into the lead-out pipe, and the other end is built in the cylinder.

The outer diameter of the first core wire 2a is designed to be smaller than the inner diameter of the introduction pipe of the introduction pipe, and the gap between the outer circumference of the first core wire 2a inserted in the introduction pipe and the inner circumference of the introduction pipe is set. The fluid is designed to flow. The second core wire 2b is also formed in the same manner as the first core wire 2a, and the fluid flows through the gap between the outer circumference of the second core wire 2b inserted into the outlet tube and the inner circumference of the outlet tube.

The holding member 3 is a columnar body having a core wire mounting through hole 3a and a feed screw mounting hole 3b. The core wire attaching through hole 3 a is a through hole for fixing the core wire 2. The feed screw mounting hole 3b is
The feed screw 6 is penetrated. Feed screw mounting hole 3
b is arranged such that its central axis coincides with the central axis of the cylindrical body. The core wire attaching through hole 3a has a first through hole 3c for fixing the first core wire 2a and a second through hole 3d for fixing the second core wire 2b. The first
The through hole 3c and the second through hole 3d are arranged parallel to each other, and the feed screw mounting hole 3b is arranged between the first through hole 3c and the second through hole 3d.

The spacer 4 is a cylindrical nut that meshes with the feed screw 6, and has a feed screw insertion hole 6a having a female screw that meshes with a male screw of the feed screw 6. At one end on the inner wall surface side in the forward direction of the spacer 4,
An annular recess 7 into which a part of the linking member 5 is inserted is provided. By the formation of the annular recessed portion 7,
A first locking end 5a capable of locking the link member 5 is provided at the forward end portion of the spacer 4 in the forward direction. The spacer 4 is in contact with the core wire 2 and the holding member 3 at the tip end surface in the forward direction. The spacer 4 can move forward when the feed screw 6 rotates to the right, and can retract when the feed screw 6 rotates to the left.

The link member 5 is a cylindrical body which surrounds the feed screw 6 and has a through hole into which the feed screw 6 is inserted. The linking member 5 has, at both ends thereof, a second locking end 5b for locking the first locking end 5a of the spacer 4 and a third locking end 5c for locking the holding member 3. Have. The second locking end 5b is formed at the rear end of the cylindrical linking member 5 so as to spread in a brim shape, and the third locking end 5c is spread at the tip of the cylindrical linking member 5 in a brim shape. Formed. When the spacer 4 retracts, the linking member 5 has the first locking end 5
Since a and the second locking end 5b are engaged with each other and the third locking end 5c is engaged with the holding member 3, as the spacer 4 retreats, the core wire 2 and the The holding member 3 is retracted.

The feed screw 6 is a columnar screw provided with a not-shown tooth engaging portion on which the spacer 4 can be screwed, on its peripheral side surface. The leading end portion of the feed screw 6 is inserted into the screw insertion hole of the spacer 4 and the feed screw mounting hole 3b, and the rear end portion thereof is projected to the outside of the housing. A rotary gear or a handle (not shown) is coupled to the rear end portion. In the case of automatic driving, the rotary gear is coupled to a motor installed outside the housing, and when the rotary gear rotates due to the rotation of the motor, the feed screw 6 rotates. In the case of manual drive, when the handle is rotated, the feed screw is rotated.

The second engaging end 5b constitutes the first engaging portion in the present invention, and the second engaging end 5c constitutes the second engaging portion in the present invention.

Next, the operation of the pressure adjusting device 1 of the present invention will be described.

The liquid supplied from the fluid supply unit installed outside the pressure adjusting device 1 is introduced into the introducing pipe. When the feed screw 6 is rotated right by the force from the outside of the casing, the spacer 4 moves forward, and when it is rotated counterclockwise, the spacer 4 moves backward.

When the spacer 4 moves forward, the spacer 4
Pushes the contact surfaces of the core wire 2 and the holding member 3 while advancing them. As a result, the core wire 2 advances in the introduction pipe and the extraction pipe. When the spacer 4 moves backward,
The first locking end 5a and the second locking end 5b are engaged with each other, and the third
The locking end 5c and the holding member 3 are engaged with each other, and the spacer 4
The core wire 2 and the holding member 3 retreat with the retreat. As a result, the core wire 2 moves backward in the introducing pipe and the extracting pipe.

The pressure of the liquid is adjusted by the action of the core wire 2 when passing through the introduction pipe. When the liquid passes through the introduction pipe, it is introduced into the housing. The introduced liquid passes through the inside of the housing and is led out to the outlet pipe. The pressure of the liquid is adjusted by the action of the core wire 2 when passing through the outlet pipe. The liquid passes through the outlet pipe and is delivered to a predetermined place outside.

As a result, the pressure of fluid such as liquid can be adjusted.

[0050]

As described above, according to the present invention, it is possible to provide a small-sized pressure adjusting device which is capable of preventing the twisting of the core wire and has few failures.

[Brief description of drawings]

FIG. 1 is a sectional view showing a pressure adjusting device of the present invention.

FIG. 2 is a cross-sectional view showing a conventional pressure adjusting device.

[Explanation of symbols]

1 ... Pressure adjusting device, 2 ... Core wire, 2a ... 1st
Core wire, 2b ... Second core wire, 3 ... holding member, 3a.
..Core wire attaching through holes, 3b ... Feed screw attaching holes, 3c ... First through holes, 3d ... Second through holes,
4 ... spacer, 5 ... coupling member, 5a ... first
Locking end, 5b ... Second locking end, 5c ... Third locking end, 6 ... Feed screw, 6a ... Feed screw insertion hole, 7
... Recessed part, 100 ... Pressure adjusting device, 101 ...
-Introduction pipe, 102 ... Sample introduction port, 103 ... Outflow pipe, 104 ... Outflow port, 105 ... Core wire, 106 ...
..Feed screw, 107 ... holding member, 108 ... cylinder, 109 ... rotary gear or handle.

Claims (2)

[Claims] 1. A core wire for adjusting a fluid pressure by being inserted into and removed from an introduction path and a discharge path, a holding member for fixing the core wire, a spacer capable of pressing the holding member, and the spacer. And a feed screw for screwing the spacer together, the pressure adjusting device comprising: 2. The pressure adjusting device according to claim 1, wherein the holding member has a through hole for attaching a core wire and a feed screw attaching hole.