JP5451489B2 - Pressure control device and connection method thereof - Google Patents

Description

  The present invention includes a pressure control valve that controls a secondary pressure of a fluid flow path to a set pressure, and a pressure setting unit that changes and sets the set pressure of the pressure control valve, and the pressure setting unit includes a spring The casing has a pressure setting spring that can change and set the set pressure by adjusting the load, and a driven rotating shaft that rotates a pressure adjusting screw that can adjust the spring load applied to the pressure setting spring, and is rotated by a drive unit. The present invention relates to a pressure control device including a drive rotation shaft that is driven and transmits rotation to the driven rotation shaft, and a connection method for connecting the drive rotation shaft to the driven rotation shaft in the pressure control device.

Conventionally, this type of pressure control device includes a pressure control valve that controls a secondary pressure of a fluid flow path to a set pressure, a pilot valve that corresponds to a pressure setting unit, and a driven rotary shaft that is provided in the pilot valve. An adjustment unit for adjusting the rotational position is provided.
The pilot valve, which is a pressure setting unit, is usually configured with a pressure setting spring that can be set and changed by adjusting the spring load, and a pressure adjustment screw that can adjust the spring load applied to the pressure setting spring. A structure is employed in which a driven drive shaft for rotating the pressure adjusting screw is provided in a state where the driven rotary shaft protrudes outside the casing.
The adjustment unit is provided with a drive unit including a drive motor and the like. The drive rotation shaft is rotated by the drive unit, and the rotation position of the driven rotation shaft is adjusted in a state of being rotated by the drive rotation shaft. Thus, the position of the pressure adjusting screw is adjusted, and the above-described spring load can be adjusted (see Patent Document 1). In the pressure control device, the casing of the pilot valve and the casing of the adjusting unit are connected by a fastener such as a bolt, and the driven rotating shaft and the driving rotating shaft are connected by a connecting member or the like.

Japanese Patent No. 4218850

Good workability is required for the connection between the driven rotary shaft and the drive rotary shaft. Specific operations to be performed include positioning at the time of connection between the pilot valve and the pressure adjusting device, relative rotation angle adjustment (front alignment) operation, connection operation of the coupling part (coupling), and driven rotation shaft and drive rotation For example, calibration work for aligning fixed axes with each other.
In the technique disclosed in the above-mentioned patent document 1, the positioning function at the time of connection between the pilot valve and the pressure adjusting device and the relative rotation angle adjustment (front alignment) work are separately adjusted at the joint between the explosion-proof case 46 and the pilot valve. Was necessary. As for the connecting operation of the connecting portion (coupling), it is necessary to insert and fix the lock pin 68 and the connecting pin 67. As for the calibration work, the driven rotary shaft and the drive rotary shaft are often fixed to each other while the pilot valve is rotated by the manual operation handle. ) And the connecting pin 67 had to be removed. Further, the angle adjustment could be adjusted only in units of 180 °.
That is, in the connection between the driven rotary shaft and the drive rotary shaft, the operator, when connecting the driven rotary shaft and the drive rotary shaft, pays attention to the centering state of the driven rotary shaft and the drive rotary shaft, , Positioning when connecting the pilot valve and the pressure regulator, positioning relative rotation angle (front alignment), connecting portion (coupling) It was necessary to carry out the connecting work and the calibration work described above. For this reason, it has become a burden more than necessary for the worker.

  The present invention has been made in view of the above-described problems, and an object of the present invention is, for example, when connecting a driven rotary shaft extending from a lower portion of a pilot valve and a drive rotary shaft extending to an upper portion of an adjusting portion. Another object of the present invention is to provide a pressure control device that does not impose an excessive burden on an operator, and a connection method thereof.

In order to achieve the above object, the connection method of the present invention includes a pressure control valve that controls the secondary pressure of the fluid flow path to a set pressure, and a pressure setting unit that changes and sets the set pressure of the pressure control valve. The pressure setting unit includes a pressure setting spring capable of changing and setting the set pressure by adjusting a spring load, and a driven rotating shaft for rotating a pressure adjusting screw capable of adjusting a spring load applied to the pressure setting spring. A pressure control device including a drive rotation shaft that is rotated by a drive unit and transmits rotation to the driven rotation shaft, and a connection method for connecting the drive rotation shaft to the driven rotation shaft,
Positioning the drive rotary shaft by a fixed base provided with a support portion for positioning the casing at a position where the driven rotary shaft can be coupled to the drive rotary shaft;
The casing is guided to the drive rotary shaft side by the guide portion provided on the fixed base, with the axis of the driven rotary shaft aligned with the axis of the drive rotary shaft. Positioning in the axial center direction of the drive rotary shaft,
A rotating shaft connecting portion is mounted from the driven rotating shaft to the driving rotating shaft, and connects the driven rotating shaft and the driving rotating shaft.

According to the above characteristic configuration, when the operator moves the driven rotary shaft from the casing of the pressure setting unit to the drive rotary shaft side and tries to connect the driven rotary shaft and the drive rotary shaft, With the drive rotating shaft positioned by the fixed mount, the casing is moved toward the drive rotating shaft in a state where the axis of the driven rotating shaft is aligned with the axis of the drive rotating shaft by the guide of the fixed mount. Guided. Further, the casing is positioned in the axial direction of the drive rotation shaft by the support portion of the fixed base, so that the driven rotation shaft is positioned in a connected state in the direction along both axial centers of the drive rotation shaft. Then, the rotating shaft connecting portion is mounted from the driven rotating shaft to the driving rotating shaft, and the driven rotating shaft and the driving rotating shaft are connected.
That is, when the worker mounts the rotating shaft connecting portion from the driven rotating shaft to the driving rotating shaft, the driven rotating shaft and the driving rotating shaft are centered, and the driven rotating shaft is driven in the axial direction of the driving rotating shaft. With the shaft positioned with respect to the drive rotation shaft, mounting operations such as the relative rotation angle alignment (front alignment) operation, the connection portion (coupling) connection operation, and the calibration operation can be performed. Thereby, when mounting | wearing a rotating shaft coupling part, an operator can perform a mounting | wearing operation | work simply without being conscious of centering and positioning, and can improve the connection workability | operativity.
As described above, the driven rotary shaft is properly centered and the driven rotary shaft is properly positioned with respect to the drive rotary shaft in the direction along the axial center. It is possible to realize a connection method that can be connected to each other.

Further features of the connecting method of the present invention are as follows:
The rotary shaft coupling portion is provided with a first external fitting fixing member for externally fixing the driven rotational shaft and a second external fitting fixing member for externally fixing the driving rotational shaft, and the second external fitting. The fixing member is provided with a rotation operation unit that externally fixes the rotation shaft coupling portion to the drive rotation shaft by a rotation operation from the outside, or releases the external fitting fixation.
The first external fitting fixing member is externally fixed to the driven rotation shaft, and the rotation operation portion is operated in a state where the casing is supported by the support portion, and the second external fitting fixing member is This is in the point of being fitted and fixed to the second rotation shaft.

According to the above characteristic configuration, the operator externally fixes the first external fitting fixing member to the driven rotation shaft and supports the casing by the support portion, and drives the driven rotation shaft and the driven rotation shaft in the axial direction of the driven rotation shaft. The second external fitting fixing member can be connected to the drive rotation shaft by simply rotating the rotation operation portion in a state where the rotation shaft is properly positioned. That is, when connecting the driven rotary shaft and the drive rotary shaft, the worker can easily realize the connection by only a simple operation of the rotary operation portion.
In addition, the rotation operation unit is rotated to release the external fitting fixation of the second external fitting fixing member with respect to the drive rotation shaft, thereby facilitating an operation (calibration operation) for adjusting the rotation angle between the driven rotation shaft and the drive rotation shaft. It becomes.

Further features of the connecting method of the present invention are as follows:
The rotary shaft connecting portion includes a first external fitting fixing member that externally fixes the driven rotary shaft, a manual rotary operation member that can rotate the driven rotary shaft about its axis, and the manual rotary operation member And a second external fitting fixing member for externally fixing the driving rotary shaft.
The first outer fitting fixing member and the manual rotation operating member are configured to be connectable and separable,
The support portion is provided with an opening having a diameter larger than the diameter of the first outer fitting fixing member in the axial direction of the drive rotation shaft,
Placing the manual rotation operation member and the second external fitting fixing member on the drive rotation shaft;
Inserting the driven rotation shaft to which the first outer fitting fixing member is fitted and fixed into the opening, and supporting the casing by the supporting portion;
In a state where the casing is supported by the support portion, the first external fitting fixing member and the manual rotation operating member are connected, and the second external fitting fixing member is externally fixed to the driving rotary shaft. The driven rotary shaft is connected to the drive rotary shaft.

Of the members of the rotary shaft connecting portion, the manual rotation operating member that rotates the driven rotary shaft is usually provided with a large diameter in the axial direction of the drive rotary shaft so as to rotate the driven rotary shaft with a small force. On the other hand, other members are provided with a relatively small diameter in the axial direction of the drive rotation shaft.
Further, since the support portion supports the casing and may support a small-diameter casing, the opening provided in the support portion is preferably made as small as possible.
According to the above characteristic configuration, the first outer fitting fixing member and the manual rotation operation member are configured to be connectable and separable in the rotary shaft connecting portion. As a result, the operator places the first externally fitted fixing member that is externally fitted and fixed on the driven rotary shaft on the support portion while the manual rotary operation member and the second externally fitted fixed member are placed on the drive rotary shaft. After being inserted into the provided opening, the first external fitting fixing member and the manual rotation operating member are connected, and the second external fitting fixing member is externally fixed to the drive rotary shaft, so that the driven rotary shaft and the drive are driven. Connect the rotating shaft.
From the above, it is not necessary to insert a relatively large-diameter manual rotation operation member into the opening, and the aperture has a comparison that allows the driven rotation shaft to which the first external fitting fixing member is externally fixed to be inserted. The diameter can be reduced. As a result, the support portion provided with the opening can support a relatively small-diameter casing.
Further, according to the above characteristic configuration, the first external fitting fixing member can be externally fixed to the driven rotary shaft in advance, so that the work operability when connecting the driven rotary shaft and the drive rotary shaft is improved. Can be made.

In order to achieve the above object, the pressure control device of the present invention comprises:
A pressure control valve that controls the secondary pressure of the fluid flow path to a set pressure, and a pressure setting unit that changes and sets the set pressure of the pressure control valve are provided, and the pressure setting unit is configured by adjusting a spring load. The casing includes a pressure setting spring capable of changing and setting the set pressure, and a driven rotating shaft capable of rotating a pressure adjusting screw capable of adjusting a spring load applied to the pressure setting spring. A pressure control device comprising a drive rotary shaft that transmits rotation to a driven rotary shaft,
A fixed mount for positioning the drive rotary shaft is provided;
The fixed gantry includes a support portion that positions the casing at a position where the driven rotation shaft can be connected to the drive rotation shaft;
A guide portion for guiding the casing to the drive rotation shaft side in a state in which the position of the driven rotation shaft matches the position of the drive rotation shaft;
A rotating shaft connecting portion that connects the driven rotating shaft and the driving rotating shaft is provided.

According to the said characteristic structure, while exhibiting the effect | action similar to the connection method of the said Claim 1, the pressure control apparatus which exhibits the same effect is realizable.
That is, the guide portion guides the casing to the drive rotation shaft side with the axis of the driven rotation shaft and the axis of the drive rotation shaft aligned, and the support portion turns the driven rotation shaft to the drive rotation shaft. The casing is positioned at a connectable position. Thus, the operator can connect the driven rotary shaft and the drive rotary shaft by attaching the rotary shaft connecting portion from the driven rotary shaft to the drive rotary shaft without being aware of the centering or positioning of the shaft.

A further characteristic configuration of the pressure control device of the present invention is as follows.
The rotary shaft coupling portion is provided with a first external fitting fixing member for externally fixing the driven rotational shaft and a second external fitting fixing member for externally fixing the driving rotational shaft, and the second external fitting. The fixing member is provided with a rotation operation portion that externally fixes the rotation shaft connecting portion to the drive rotation shaft by an external rotation operation or releases the external fit fixing.

According to the said characteristic structure, while exhibiting the effect | action similar to the connection method of the said Claim 2, the pressure control apparatus which exhibits the same effect is realizable.
That is, in a state where the first external fitting fixing member externally fixes the driven rotation shaft, the rotation operation unit can be attached to the driving rotation shaft by a simple operation of external rotation operation. Since it is fitted and fixed, the driven rotary shaft and the drive rotary shaft can be easily connected.
In addition, the rotation operation unit is rotated to release the external fitting fixation of the second external fitting fixing member with respect to the drive rotation shaft, thereby facilitating the operation (calibration work) for adjusting the rotation angle between the driven rotation shaft and the drive rotation shaft. It becomes.

A further characteristic configuration of the pressure control device of the present invention is as follows.
The rotary shaft connecting portion includes a first external fitting fixing member that externally fixes the driven rotary shaft, a manual rotary operation member that can rotate the driven rotary shaft about its axis, and the manual rotary operation member And a second external fitting fixing member for externally fixing the driving rotary shaft.
The first outer fitting fixing member and the manual rotation operating member are configured to be connectable and separable,
The support portion is provided with an opening portion having a diameter larger than the diameter of the first external fitting fixing member in the axial direction of the drive rotation shaft.

According to the said characteristic structure, while exhibiting the effect | action similar to the connection method of the said Claim 3, the pressure control apparatus which exhibits the same effect is realizable.
According to the above characteristic configuration, the rotary shaft coupling portion is separated between the first outer fitting fixing member and the manual rotation operation member, and the first outer fitting fixing member is fitted and fixed to the driven rotation shaft. The manual rotation operation member and the second external fitting fixing member can be placed on the drive rotation shaft.
That is, among the members constituting the rotating shaft connecting portion, the manual rotation operation member is not inserted into the opening, and only the first external fitting fixing member is inserted. Thereby, the diameter of the opening can be made relatively small so that only the first external fitting fixing member can be inserted. As a result, the support portion provided with the opening can support a relatively small-diameter casing.

A further characteristic configuration of the pressure control device of the present invention is as follows.
The rotating shaft connecting portion is provided with a sliding connecting member that connects the first external fitting fixing member and the manual rotation operating member slidably in the axial direction of the drive rotating shaft. It is in.

According to the above characteristic configuration, the sliding connecting member connects the first outer fitting fixing member and the manual rotation operating member so as to be slidable in the axial direction of the drive rotating shaft. Can be connected in a state in which mutual misalignment is allowed.
Thereby, even if it is a case where the axial center of a driven rotating shaft and the axial center of a drive rotating shaft shift | deviate with use, the connection of a driven rotating shaft and a driving rotating shaft can be maintained appropriately.

A further characteristic configuration of the pressure control device of the present invention is as follows.
The fixed gantry includes a positioning and fixing mechanism that prevents the casing supported by the support portion from being detached from the support portion in the axial direction of the driven rotation shaft.
In the state where the positioning and fixing mechanism works, the casing can be rotated around the axis of the driven rotating shaft.

  According to the above-described characteristic configuration, the positioning and fixing mechanism is configured to prevent the casing supported by the support portion from being detached from the support portion in the axial direction of the driven rotation shaft. Can be rotated. As a result, the casing is positioned in the axial direction of the driven rotary shaft, and the direction around the axis of the driven rotary shaft can be adjusted to the direction in which the pipe can be connected to the casing.

It is a whole block diagram of the pressure control device of the present invention. It is a one part perspective view of the pressure control apparatus of this invention. It is a partial sectional view of the pressure control device of the present invention. It is a partial sectional view of the pressure control device concerning a 1st embodiment of the present invention. It is a disassembled perspective view of the rotating shaft connection part of this invention. It is a partial sectional view of a pressure control device concerning a 2nd embodiment of the present invention.

[First Embodiment]
An embodiment of a pressure control device and a connecting method thereof according to the present invention will be described with reference to the drawings.
As shown in FIG. 1 or FIG. 2, the pressure control device includes a pressure control valve 2 that adjusts the secondary pressure of the fluid flow path 1 to a set pressure, and a pressure that changes and sets the set pressure of the pressure control valve 2. And a setting unit 3. And the pressure setting part 3 is specifically comprised from the pilot valve 4 which supplies a drive pressure to the pressure control valve 2 so that the secondary side pressure of the fluid flow path 1 may become set pressure. Although details will be described later, the pressure control device of the present invention is configured to change and set the set pressure of the pressure control valve 2 by adjusting the setting of the pilot valve 4.

  Here, although illustration is omitted, for example, by branching the downstream side of the fluid flow path 1 from the pressure control valve 2 into a plurality of branch paths, and connecting each of the plurality of branch paths to each consumer. In addition, it is configured to supply a fluid such as natural gas to a plurality of consumers. The secondary pressure on the downstream side of the pressure control valve 2 can be adjusted to a set pressure lower than the primary pressure on the upstream side.

  As shown in FIG. 1, the pressure control valve 2 includes a first diaphragm D1, and the internal space is partitioned into a first chamber H1 and a second chamber H2 by the first diaphragm D1. The pressure control valve 2 includes a first valve body B1 that opens and closes the fluid flow path 1, and the first valve body B1 is configured to be opened and closed by a first diaphragm D1. The first chamber H1 is provided with a biasing spring G1 that presses and biases the first diaphragm D1 toward the valve closing direction of the first valve body B1.

  As shown in FIGS. 1 and 3, the pilot valve 4 includes a second diaphragm D2 and a third diaphragm D3, and the internal space of the second diaphragm D2 and the third diaphragm D3 is the third chamber H3. It is divided into a fourth chamber H4 and a fifth chamber H5. The third chamber H3 is communicatively connected to the secondary side of the fluid flow path 1 (downstream side from the pressure control valve 2) by the first secondary pressure introduction path 5, and the second secondary pressure The introduction path 6 is connected to the first chamber H1 of the pressure control valve 2 in communication. The fourth chamber H4 is connected to the primary side (upstream side of the pressure control valve 2) of the fluid flow path 1 by the primary pressure introduction path 7 and is connected to the pressure control valve 2 by the driving pressure introduction path 8. The two rooms H2 are connected in communication. The fifth chamber H5 is provided with a pressure setting spring G2 that presses and urges the second diaphragm D2 toward the third chamber H3. Although not shown, the second diaphragm D2 and the third diaphragm D3 are connected by a connecting portion or the like, and are configured to be integrally displaceable up and down. A pressure setting spring G2 is disposed in the fifth chamber H5. The pressure setting spring G2 biases the third diaphragm D3 toward the fourth chamber H4, so that the second diaphragm D2 is third. It is urged to the chamber H3 side.

  A second valve body B2 is provided at the distal end of the primary pressure introduction path 7, and the second valve body B2 is configured to be opened and closed by a second diaphragm D2. That is, when the second diaphragm D2 is displaced toward the third chamber H3, the second valve body B2 is opened, and the fluid on the primary side of the fluid flow path 1 passes through the primary pressure introduction path 7 to the fourth chamber H4. be introduced. On the other hand, when the second diaphragm D2 is displaced toward the fourth chamber H4, the second valve body B2 is closed, and the introduction of the primary fluid into the fourth chamber H4 is stopped.

The operation when the secondary pressure is adjusted to the set pressure will be described.
When the secondary pressure of the fluid flow path 1 falls below the set pressure, the third chamber H3 of the pilot valve 4 that is connected to the secondary side of the fluid flow path 1 through the first secondary pressure introduction path 5 And the second diaphragm D2 is displaced to the third chamber H3 side by the biasing force of the pressure setting spring G2. As a result, the second valve body B2 of the pilot valve 4 is operated to the open side, and the primary side pressure of the fluid flow path 1 is introduced into the fourth chamber H4 through the primary side pressure introduction path 7, and the pressure in the fourth chamber H4 Rises. Then, the increased pressure in the fourth chamber H4 is supplied as the driving pressure to the second chamber H2 of the pressure control valve 2 through the driving pressure introduction path 8, and the pressure in the second chamber H2 also increases, and the first chamber H1. The first diaphragm D1 is displaced toward the first chamber H1 due to the pressure difference between the first chamber H2 and the second chamber H2. Therefore, the first valve body B1 of the pressure control valve 2 is operated to the open side, and the secondary side pressure of the fluid flow path 1 is increased to adjust the secondary side pressure to the set pressure.

  On the other hand, when the secondary side pressure rises higher than the set pressure, the pressure in the third chamber H3 of the pilot valve 4 rises, and the second diaphragm D2 moves toward the fourth chamber H4 against the urging force of the pressure setting spring G2. Displace. As a result, the second valve body B2 of the pilot valve 4 is operated to the closed side, and there is no fluid supply source to the fourth chamber H4. Then, the fluid in the second chamber H2 is discharged to the secondary side via the orifice 91, the second secondary pressure introduction path 6, the third chamber H3, and the first secondary pressure introduction path 5, The pressure in the two chambers H2 decreases, and the first diaphragm D1 is displaced toward the second chamber H2 due to the pressure difference between the first chamber H1 and the second chamber H2. Accordingly, the first valve body B1 of the pressure control valve 2 is operated to the closed side, and the secondary side pressure of the fluid flow path 1 is reduced to adjust the secondary side pressure to the set pressure.

  The set pressure of the pressure control valve 2 is not always set to a constant pressure, but the set pressure is adjusted to the target set pressure that changes according to the load, etc. by providing the pressure setting unit 3 including the pilot valve 4. ing. For example, in the fluid flow path 1, the load becomes large during a time period in which much demand is expected, so the pressure setting unit 3 adjusts the set pressure to a high target set pressure, and the load is set in other time periods. Therefore, the set pressure is adjusted to the low target set pressure.

  As described above, the driving pressure corresponding to the magnitude relationship between the urging force of the pressure setting spring G2 in the pilot valve 4 and the secondary side pressure supplied through the first secondary side pressure introduction path 5 is supplied from the pilot valve 4 to the pressure. The pressure is supplied to the control valve 2, and the secondary pressure is adjusted to the set pressure by the pressure control valve 2. Therefore, the pressure setting unit 3 changes and sets the set pressure of the pressure control valve 2. Specifically, the set pressure of the pressure control valve 2 is adjusted by adjusting the spring load of the pressure setting spring G2. It is configured to be freely changeable.

As shown in FIG. 3, the pilot valve 4 described so far includes a pressure setting spring G2 that can change and set a set pressure by adjusting a spring load, and a pressure adjustment that can adjust a spring load applied to the pressure setting spring G2. A screw 10, a casing 14 in which the pressure setting spring G <b> 2 and the pressure adjusting screw 10 are housed, and a first rotating shaft J <b> 1 (an example of a driven rotating shaft) that can freely rotate the pressure adjusting screw 10 while passing through the casing 14. It is composed of
On the other hand, on the side of the casing 14 where the first rotation axis J1 protrudes (the lower side in the direction of arrow Z in FIG. 3), the second rotation axis J2 (an example of a drive rotation axis) and the second rotation axis J2 are rotated. A drive unit 11 to be driven, a control unit (not shown) for changing and setting the set pressure by controlling the operation of the drive unit 11, and the drive unit 11 and the control unit in a state where the second rotating shaft J2 is penetrated. A storage section 15 is provided for storage inside. The drive unit 11 receives the adjustment signal to be set as the secondary side pressure, rotationally drives the second rotation axis J2 by an amount corresponding to the adjustment signal, and the axial direction of the second rotation axis J2 (in FIG. 3). In the direction of arrow Z), the position of the pressure adjusting screw 13 is adjusted. Therefore, the mechanism including the drive unit 11 provided in the storage unit 15 functions as the adjustment unit described above.

  More specifically, in the pressure control device of the present invention, the casing 14 of the pilot valve 4 and the storage portion 15 are connected, and the first rotating shaft J1 and the second rotating shaft J2 are connected by the rotating shaft connecting portion 16 described later. It connects, and it has the structure which adjusts the spring load of the pressure setting spring G2 because the drive part 11 rotates the 1st rotating shaft J1 and the 2nd rotating shaft J2 integrally.

  The pressure setting spring G <b> 2 is disposed in the fifth chamber H <b> 5 of the pilot valve 4, and an upper end portion thereof is in contact with the third diaphragm D <b> 3 and a lower end portion thereof is in contact with the spring receiving portion 13. And the 1st screw part N1 is formed in the inner wall part in the lower part which forms the 5th chamber H5 among the casings 14, and the spring receiving part 13 is the 2nd screw part formed in the exterior. N2 is provided in a state where the first screw portion N1 formed in the casing 14 is screwed. In the fifth chamber H5 of the pilot valve 4, the first rotating shaft J1 is disposed in a state in which the spring receiving portion 13 passes through the pressure setting spring G2 in the expansion / contraction direction (the arrow Z direction in FIG. 3). When the first rotation axis J1 rotates, the first rotation axis J1 and the spring receiving portion 13 rotate integrally, and the spring receiving portion 13 moves in the expansion / contraction direction. In this way, the spring receiving portion 13 is moved in the expansion / contraction direction by the integral rotation of the first rotating shaft J1 and the spring receiving portion 13, and the spring load applied to the pressure setting spring G2 is adjustable. Further, the first rotating shaft J1 is disposed in such a manner that a lower end portion having a small diameter penetrates the casing 14 and protrudes downward.

  On the other hand, as described above, the drive unit 11 and the control unit (not shown) are stored in the storage unit 15 that rotatably penetrates the second rotation shaft J2 that is rotationally driven by the drive unit 11. ing. The second rotating shaft J2 is disposed in a state where the upper end side portion protrudes upward from the storage portion 15. And the 1st rotating shaft J1 and the 2nd rotating shaft J2 are connected by connecting the lower end side site | part of the 1st rotating shaft J1, and the upper end side site | part of the 2nd rotating shaft J2 in the rotating shaft connection part 16 mentioned later. Are configured to be rotatable together. As a result, the second rotating shaft J2 is rotationally driven by the drive unit 11, thereby rotating the second rotating shaft J2 and the first rotating shaft J1 integrally, thereby causing the spring receiving portion 13 to move in the telescopic direction (in FIG. 3). In the direction of arrow Z), the spring load applied to the pressure setting spring G2 is adjusted.

As described above, in the pressure control device of the present invention, the drive unit 11 integrally rotates the first rotating shaft J1 and the second rotating shaft J2 to thereby rotate the spring load of the pressure setting spring G2 of the pilot valve 4. Is adjusted. In such a configuration, if the axis of the first rotation axis J1 and the axis of the second rotation axis J2 are misaligned, the shaft may deteriorate. For this reason, the 1st rotating shaft J1 and the 2nd rotating shaft J2 need to be centered.
In the pressure control device of the present invention, the first rotary shaft J1 and the second rotary shaft J2 are centered and positioned so as to be connectable in the direction along the two shaft centers. It is comprised so that rotation axis J2 can be connected. That is, the operator connects the first rotary shaft J1 and the second rotary shaft J2 without being aware of the centering of the shaft or positioning in the direction along the two shaft centers (the arrow Z direction in FIGS. 2 and 4). it can. Therefore, the configuration will be described in detail below.

  In the pressure control device of the present invention, as shown in FIG. 2 or FIG. 4, the shaft of the second rotary shaft J2 is installed in a state where the storage portion 15 having the second rotary shaft J2 is installed on the installation surface (not shown). A fixed base 50 is provided for guiding the movement of the casing 14 in the center direction (the direction of arrow Z in FIG. 4) and positioning the casing 14 in the center direction of the second rotation axis J2.

[Fixed mount]
The fixed pedestals 50 are legs 51 (this embodiment) dispersedly arranged around the storage unit 15 in a state of being grounded on an installation surface (not shown) and extending vertically upward (upward in the arrow Z direction in FIG. 4). In the form, four (only two are shown in FIG. 4), a support 53 that is supported by the leg 51 and can support the lower end 52 of the casing 14, and an upper side from the support 53 ( 4 that extends upward (in the direction of arrow Z in FIG. 4) and guides the casing 14 toward the second rotation axis J2 in a posture in which the axial centers of the first rotation axis J1 and the second rotation axis J2 coincide. The support portion 53 is provided with an opening 58 into which the first rotation axis J1 can be inserted in the axial center direction of the second rotation axis J2 (the arrow Z direction in FIG. 4).
Further, the fixed mount 50 is provided with a storage portion external fitting fixing portion 55 that externally fixes and fixes an upper end (upper side in the direction of arrow Z in FIG. 4) of the storage portion 15. In addition, the storage portion outer fitting fixing portion 55 has a plurality of connecting portions 56 (four in the present embodiment; only two are shown in FIG. 4) for connecting the storage portion outer fitting fixing portion 55 and the support portion 53. Is provided. Accordingly, the second rotation axis J2 of the storage unit 15 is positioned with respect to the fixed mount 50.

The guide portion 54 includes a wall portion 54a extending along the axial center direction (Z-axis direction in FIG. 4) of the second rotation axis J2. The wall portion 54a has an annular shape having a diameter in the axial radial direction around the axis of the second rotation axis J2 (straight line Y in FIG. 4), and the inner surface 54b of the wall portion 54a is a side surface 57 of the casing 14. It is provided in a state along. That is, the guide portion 54 is configured such that the side surface 57 of the casing 14 extends along the inner surface 54b of the wall portion 54a, the axial centers of the first rotation axis J1 and the second rotation axis J2 are aligned, and the casing 14 is moved to the second position. Guide to the rotation axis J2.
By guiding the casing 14 with the guide portion 54, the center of the casing 14 is substantially centered with respect to the axis of the second rotating shaft J2 located at the center of the annular wall portion 54a as viewed in the axial direction of the second rotating shaft J2. The first rotation axis J1 provided on the axis can be aligned with each other, and the first rotation axis J1 and the second rotation axis J2 are centered.

The support portion 53 supports the lower end portion 52 of the casing 14 after the casing 14 is guided by the guide portion 54, thereby connecting the first rotation axis J1 provided in the casing 14 to the second rotation axis J2. Positioning at a possible position (state shown by a two-dot chain line in FIG. 4).
More specifically, the support portion 53 is formed in an annular shape as viewed in the axial direction of the second rotation shaft J2, and supports the casing 14 in a state of contacting the peripheral edge of the lower side end portion 52 of the casing 14. . Furthermore, an opening 58 is provided inside the annular support portion 53 as viewed in the axial direction of the second rotation axis J2, and the opening 58 is fixedly fitted to the rotation shaft connecting portion 16 described later. The first rotating shaft J1 is configured to be insertable. Thereby, in a state where the support portion 53 is supporting the casing 14, the first rotation shaft J1 with the rotation shaft coupling portion 16 fitted and fixed is positioned at a position where it can be connected to the second rotation shaft J2. .

Thus, the first rotation axis J1 is centered with respect to the second rotation axis J2, and the first rotation axis J1 is positioned at a position where it can be connected to the second rotation axis J2 in the direction along the axis. In this state, the operator connects the first rotary shaft J1 and the second rotary shaft J2 by operating the rotary shaft connecting portion 16 described below.
As will be described in detail later, the rotating shaft coupling portion 16 is a first outer fitting fixing member 17 that is fitted and fixed to the first rotating shaft J1, and a second outer fitting fixing member that is fitted and fixed to the second rotating shaft J2. 21. The second outer fitting fixing member 21 is provided with a rotating lever 21a (rotating operation unit) that externally fixes the second outer fitting fixing member 21 to the second rotation shaft J2 or releases the outer fitting fixation. Example) is provided.
The operator attaches the first outer fitting fixing member 17 to the first rotating shaft J1 and fixes the casing 14 to the guide portion 54 in a state where the rotating shaft connecting portion 16 is connected to the first rotating shaft J1. The casing 14 is supported by the support portion 53 while being guided. Thereby, the operator centers the first rotation axis J1 and the second rotation axis J2, and the first rotation axis J1 is the first rotation axis J1 in the axial direction (the arrow Z direction in FIG. 4). The second external fitting fixing member 21 is externally fixed to the second rotational axis J2 only by rotating the rotary lever 21a while being positioned with respect to the second rotational axis J2, and the first rotational axis J1 and the second rotational axis J2. The rotary shaft J2 can be connected. As a result, when the operator connects the first rotating shaft J1 and the second rotating shaft J2, the operator can perform a relatively simple operation of rotating the rotating lever 21a without paying special attention to the centering and positioning of the shaft. Thus, the first rotation axis J1 and the second rotation axis J2 can be connected.

Further, the fixed base 50 is provided with a positioning and fixing mechanism for appropriately positioning and fixing the casing 14. Specifically, a through hole 59 that penetrates the wall 54a is provided in the wall 54a of the guide 54 in a direction perpendicular to the axis of the second rotation axis J2 (straight line Y in FIG. 4). A fastener T such as a bolt that can be screwed into the through hole 59 is provided so as to be able to protrude toward the axis in the axial direction of the second rotating shaft J2 (the direction along the arrow X in FIG. 4). ing. The fastener T is fitted in a concave portion 60 provided in a groove shape along the circumferential direction on the side surface 57 of the casing 14 supported by the support portion 53, and the casing 14 is the axis of the first rotation axis J <b> 1. The casing 14 is positioned and fixed so as to be prevented from detaching from the support portion 53 in the direction (arrow Z direction in FIG. 4) and to be rotatable around the axis of the first rotation axis J1 (straight line Y in FIG. 4). . Thereby, the casing 14 is positioned in the axial direction of the first rotation axis J1, and the direction around the axis of the first rotation axis J1 is set to the second secondary pressure introduction path with respect to the casing 14. 6 (shown in FIGS. 1 and 2) and the primary side pressure introduction path 7 (shown in FIGS. 1 and 2) can be adjusted in a connectable direction.
In this manner, the through hole 59, the fastener T, and the recess 60 function as a positioning and fixing mechanism that positions and fixes the casing 14.

(Rotating shaft connecting part)
As described above, the rotary shaft coupling portion 16 includes the first external fitting fixing member 17 that externally fixes the first rotational shaft J1, and the second external fitting fixing member 21 that externally fixes the second rotational shaft J2. And between the first rotation axis J1 and the second rotation axis J2, as shown in FIG. 5, the first external fitting fixing member 17 is placed in a first direction along the horizontal plane (the direction of the arrow X1 in FIG. 4). A first sliding support member 18 (an example of a sliding support member) that is slidably supported, and a second direction orthogonal to the first direction on the horizontal plane (the direction indicated by the arrow X2 in FIG. 4) ) Are slidably supported, and a second rotation support member 19 (an example of a slide support member) and a manual rotation operation member 20 for manually rotating the first rotation shaft J1 are provided.

More specifically, as shown in FIG. 5, the first outer fitting fixing member 17 is formed in a C shape whose upper side portion can be fitted to the lower end side portion of the first rotating shaft J1. And the 1st external fitting fixing member 17 is tightened with the fasteners T, such as a volt | bolt, in the state which fitted the lower end side site | part of the 1st rotating shaft J1 in the upper side site | part of the 1st external fitting fixing member 17. The first outer fitting fixing member 17 is fitted and fixed to the lower end side portion of the first rotating shaft J1 after reducing the diameter. A convex portion 17a extending along the first direction is formed in the lower portion of the first outer fitting fixing member 17, and the upper portion of the first sliding support member 18 is in the first direction. A first groove portion 18a extending along the line is formed. Therefore, by fitting the convex portion 17a of the first outer fitting fixing member 17 into the first groove portion 18a, the first sliding support member 18 supports the first outer fitting fixing member 17 to be slidable in the first direction. To do. The manual rotation operation member 20 is configured by a plate-like body disposed along the horizontal plane, and a groove portion 20a extending along the second direction is formed at the central portion of the upper surface thereof. The second sliding support member 19 is formed in a rod shape that can be fitted into the groove 20 a of the manual rotation operation member 20. The depth of the groove 20a of the manual rotation operation member 20 is formed to be shallower than the height of the second sliding support member 19, and the manual rotation operation member 19 is fitted in the groove 20a. Projects upward from 20. The second sliding support member 19 is fixed to the manual rotation operation member 20 by a fastening portion T such as a bolt while being fitted in the groove 20a. A second groove portion 18b extending along the second direction is formed at a lower portion of the first sliding support member 18, and the second sliding support member 19 is fitted into the second groove portion 18b. The second sliding support member 19 supports the second sliding support member 18 so as to be slidable in the second direction. The second outer fitting fixing member 21 is formed in a C shape that can be fitted to the upper end side portion of the second rotation shaft J2, and is fixed to the manual rotation operating member 20 by a fastener T such as a bolt. The second outer fitting fixing member 21 is provided with a rotating lever 21a that can be freely rotated around the rotation axis P. By rotating the rotating lever 21a, the second outer fitting fixing member 21 is reduced in diameter. Or it is comprised so that diameter expansion is possible. As a result, the operator manually rotates the rotation lever 21a to externally fix the second external fitting fixing member 21 to the upper end portion of the second rotary shaft J2, or release the external fixation. To do. The above configuration facilitates not only the assembly but also the calibration (rotational angle alignment) operation.
That is, according to the above configuration, in the axial direction of the first rotation axis J1 (the direction of the arrow Z in FIG. 4), the manual rotation operation member 20 is first than the second external fitting fixing member 21 having the rotation operation lever 21a. It is provided on the rotating shaft J1 side. Thus, the connection between the first rotation axis J1 and the second rotation axis J2 is released with the manual rotation operation member 20 fixed to the first rotation axis J1 by a simple operation of rotating the rotation lever 21a. Then, by rotating the manual rotation operation member 20, the first rotation axis J1 can be rotated and the calibration (rotational angle alignment) can be performed appropriately.

[Second Embodiment]
Next, a second embodiment of the present invention will be described based on FIG. In the pressure control device and the connection method thereof according to the second embodiment, even if the pilot valve 4 has a relatively small diameter in the axial direction of the second rotating shaft J2 (the arrow Z direction in FIG. 6), the pilot valve 4 (casing 14) is characterized in that it can be positioned while being properly guided.
Therefore, hereinafter, the configuration of the pressure control device and the connecting method thereof will be described, and description of other configurations may be omitted.

As shown in FIG. 6, the pressure control device according to the second embodiment has a fixed base 50 as in the first embodiment, and the fixed base 50 is grounded to a ground plane (not shown). In addition, the leg portions 51 (three in the present embodiment; only two are shown in FIG. 6) distributed around the storage portion 15 in a state of extending upward in the vertical direction, and supported by the leg portions 51. A support portion 53 capable of supporting the lower end portion 52 of the casing 14, and extends upward from the support portion 53 (upward in the direction of arrow Z in FIG. 6) and guides the casing 14 toward the second rotation axis J <b> 2. The support portion 53 is provided with an opening 58 into which the first rotation axis J1 can be inserted in the axial direction of the second rotation axis J2 (the arrow Z direction in FIG. 6). Yes.
Further, the fixed base 50 is provided with a storage portion external fitting fixing portion 55 that externally fixes and fixes an upper end (upper side in the direction of arrow Z in FIG. 6) of the storage portion 15. Further, the storage portion external fitting fixing portion 55 includes the storage portion external fitting fixing portion 55 and the support portion 53 in the axial direction (in the direction of arrow X in FIG. 6) of the second rotation axis J2 (see FIG. 6). 6 are provided with connecting portions 56 (four in the present embodiment; only two are shown in FIG. 6) that are distributed around the straight line Y). Accordingly, the second rotation axis J2 of the storage unit 15 is positioned with respect to the fixed mount 50. About the above structure, there is no place different from 1st Embodiment.

In the second embodiment, the casing 14 having the first rotation axis J1 is guided and positioned by the fixed mount 50 described above, and the first rotation axis J1 and the second rotation axis J2 are connected to each other by the rotation axis. Although it connects by the part 16, the characteristic is that the member which comprises the rotating shaft connection part 16 is comprised so that connection and isolation | separation are possible. Therefore, in the following, the configuration of the rotary shaft coupling portion 16 and a coupling method using the same will be described.
As described in the first embodiment, the rotary shaft connecting portion 16 includes the first external fitting fixing member 17 that externally fixes the first rotary shaft J1, and the first external fitting fixing member 17 in the first direction along the horizontal plane. A first slide support member 18 (an example of a slide support member) that is slidably supported in the direction of arrow X1 in FIG. 4 and a second that is orthogonal to the first direction in the horizontal plane. A second sliding support member 19 (an example of a sliding support member) that is slidably supported in a direction (arrow X2 direction in FIG. 4), and a manual rotation operation member 20 that manually rotates the first rotation shaft J1. And a second external fitting fixing member 21 that externally fixes the second rotary shaft J2.
Here, among the members constituting the rotating shaft connecting portion 16, the manual rotation operating member 20 is configured to move the first rotating shaft J1 with a small force in the axial diameter direction of the second rotating shaft J2 (the arrow Z direction in FIG. 6). It is configured to have a large diameter so that it can rotate, and the other members are configured to have a relatively small diameter.

The first sliding support member 18 and the second sliding support member 19 that slidably connect the first outer fitting fixing member 17 and the manual rotation operation member 20 in a horizontal plane are so-called Oldham. It is composed of a joint. For this reason, the first external fitting fixing member 17 and the manual rotation operating member 20 are in a state via the first sliding support member 18 and the second sliding support member 19 in the axial direction of the second rotation axis J2. It can be connected and disconnected.
In the second embodiment, the first outer fitting fixing member 17 and the first rotation fixing member 17 are separated from the first rotation shaft J1 in a state where the first outer fitting fixing member 17 and the manual rotation operating member 20 are separated, and the manual rotation operation member. 20 and the second external fitting fixing member 21 are placed on the second rotation axis J2 on the second rotation axis J2 side of the opening 58 (the lower side of the arrow Z in FIG. 6).
The first sliding support member 18 and the second sliding support member 19 can be connected to either the first outer fitting fixing member 17 or the manual rotation operation member 20, but in this embodiment, FIG. As shown, both the first sliding support member 18 and the second sliding support member 19 are connected to the manual rotation operation member 20.

According to the above-described configuration, the operator inserts the first rotating shaft J1 into the opening 58 of the support portion 53 and connects the second rotating shaft J2 to the first rotating shaft J1 to be connected to the second rotating shaft J2. In the case where the first rotation shaft J1 is guided to the side, the first rotation shaft J1 is inserted into the opening 58 in a state where the first outer fitting fixing member 17 having a relatively small diameter is fitted. That is, the manual rotation operation member 20 is not inserted into the opening 58, and only the first external fitting fixing member 17 is inserted. Thereby, since the aperture diameter of the opening part 58 should just be larger than the diameter of the 1st external fitting fixing member 17 in the axial-diameter direction (arrow X direction in FIG. 6) of the 2nd rotating shaft J2, relatively Small diameter can be set.
And since the aperture diameter of the opening part 58 provided in the support part 53 can be made into a comparatively small diameter, the pilot which has the casing 14 of a comparatively small diameter in the axial diameter direction (arrow X direction in FIG. 6) of the 2nd rotating shaft J2. The valve 4 can also be supported by the support portion 53.

Next, the connection method by the said structure is demonstrated based on FIG.
When the operator connects the first rotary shaft J1 to the second rotary shaft J2, first, of the members constituting the rotary shaft connecting portion 16, the first external fitting fixing member 17 is externally fitted to the first rotary shaft J1. The manual rotation operation member 20 and the second external fitting fixing member 21 are placed on the second rotation axis J2 on the second rotation axis side of the opening 58 (downward in the direction of arrow Z in FIG. 6). To do.
At this time, the first sliding support member 18 and the second sliding support member 19 can be connected to either the first outer fitting fixing member 17 or the manual rotation operation member 20, but in this embodiment, As shown in FIG. 6, both the first sliding support member 18 and the second sliding support member 19 are connected to the manual rotation operation member 20.
Next, the casing 14 is guided to the guide portion 54 in a state in which the first external fitting fixing member 17 is externally fixed to the first rotational axis J1, and the first rotational axis J1 and the first external fitting fixing member 17 are It guides to the second rotating shaft J2 side through the opening 58 of the support portion 53.
In a state where the lower end portion 52 of the casing 14 is supported by the support portion 53, the first external fitting fixing member 17, the manual rotation operating member 20, and the second external fitting fixing member 21 are connected to the first sliding support member. 18 and the second sliding support member 19 are connected (state shown by a two-dot chain line in FIG. 6).
And the 1st rotating shaft J1 and the 2nd rotating shaft J2 are connected by fixing the 2nd fitting fitting member 21 to the 2nd rotating shaft J2.

[Another embodiment]
(A) In the second embodiment, when the first rotating shaft J1 is guided to the second rotating shaft J2 side through the opening 58, the opening 58 is the member constituting the rotating shaft connecting portion 16. Only the first outer fitting fixing member 17 is inserted. However, the first external fitting fixing member 17 can be externally fixed to the first rotation shaft J1 in a state where the first sliding support member 18 and the second sliding support member 19 are connected. In this case, since the first outer fitting fixing member 17, the first sliding support member 18, and the second sliding support member 19 are inserted into the opening 58, the aperture 58 has a diameter of The outer fitting fixing member 17, the first sliding support member 18, and the second sliding support member 19 are set to have insertable apertures. Even in this case, since the manually rotating operation member 20 having a relatively large diameter is not inserted into the opening 58, the aperture can be set to a relatively small diameter.

(B) In the above embodiment, as an example of the rotation operation unit, the second external fitting fixing member 21 is provided with the rotation lever 21a that can be rotated around the rotation axis P. Even if the rotation operation portion is a thumbscrew or the like that can be freely rotated around the rotation axis P on the second external fitting fixing member 21, the rotation operation portion exhibits its function well.

  The pressure control device according to the present invention is a connection that can connect the driven rotary shaft to the drive rotary shaft in a state where the driven rotary shaft and the drive rotary shaft are properly centered and the driven rotary shaft is properly positioned with respect to the drive rotary shaft. The present invention can be effectively used as a method, a pressure control device that provides a pressure control device, and a connection method thereof.

DESCRIPTION OF SYMBOLS 1 Fluid flow path 2 Pressure control valve 3 Pressure setting part 10 Pressure adjusting screw 11 Drive part 16 Rotating shaft coupling part 17 1st external fitting fixing member 18 1st sliding support member (an example of a sliding support member)
19 Second sliding support member (an example of a sliding support member)
20 Manual Rotation Operation Member 21 Second External Fixing Fixing Member 50 Fixing Base 53 Supporting Portion 54 Guide Portion 58 Opening Portion 59 Through Hole (Example of Positioning Fixing Mechanism)
60 recess (an example of a positioning and fixing mechanism)
T fastener (example of positioning and fixing mechanism)
G2 Pressure setting spring J1 First rotating shaft (an example of a driven rotating shaft)
J2 Second rotating shaft (an example of a driving rotating shaft)

Claims (8)

A pressure control valve that controls the secondary pressure of the fluid flow path to a set pressure, and a pressure setting unit that changes and sets the set pressure of the pressure control valve are provided, and the pressure setting unit is configured by adjusting a spring load. The casing includes a pressure setting spring capable of changing and setting the set pressure, and a driven rotating shaft capable of rotating a pressure adjusting screw capable of adjusting a spring load applied to the pressure setting spring. In a pressure control device including a drive rotation shaft that transmits rotation to a driven rotation shaft, a connection method for connecting the drive rotation shaft to the driven rotation shaft,
Positioning the drive rotary shaft by a fixed base provided with a support portion for positioning the casing at a position where the driven rotary shaft can be coupled to the drive rotary shaft;
The casing is guided to the drive rotary shaft side by the guide portion provided on the fixed base, with the axis of the driven rotary shaft aligned with the axis of the drive rotary shaft. Positioning in the axial center direction of the drive rotary shaft,
A connecting method for connecting the driven rotary shaft and the drive rotary shaft by mounting a rotary shaft connecting portion from the driven rotary shaft to the drive rotary shaft. The rotary shaft coupling portion is provided with a first external fitting fixing member for externally fixing the driven rotational shaft and a second external fitting fixing member for externally fixing the driving rotational shaft, and the second external fitting. The fixing member is provided with a rotation operation unit that externally fixes the rotation shaft coupling portion to the drive rotation shaft by a rotation operation from the outside, or releases the external fitting fixation.
The first external fitting fixing member is externally fixed to the driven rotation shaft, and the rotation operation portion is operated in a state where the casing is supported by the support portion, and the second external fitting fixing member is The connection method according to claim 1, wherein the second rotation shaft is externally fitted and fixed. The rotary shaft connecting portion includes a first external fitting fixing member that externally fixes the driven rotary shaft, a manual rotary operation member that can rotate the driven rotary shaft about its axis, and the manual rotary operation member And a second external fitting fixing member for externally fixing the driving rotary shaft.
The first outer fitting fixing member and the manual rotation operating member are configured to be connectable and separable,
The support portion is provided with an opening having a diameter larger than the diameter of the first outer fitting fixing member in the axial direction of the drive rotation shaft,
Placing the manual rotation operation member and the second external fitting fixing member on the drive rotation shaft;
Inserting the driven rotation shaft to which the first outer fitting fixing member is fitted and fixed into the opening, and supporting the casing by the supporting portion;
In a state where the casing is supported by the support portion, the first external fitting fixing member and the manual rotation operating member are connected, and the second external fitting fixing member is externally fixed to the driving rotary shaft. The connecting method according to claim 1, wherein the driven rotating shaft and the driving rotating shaft are connected. A pressure control valve that controls the secondary pressure of the fluid flow path to a set pressure, and a pressure setting unit that changes and sets the set pressure of the pressure control valve are provided, and the pressure setting unit is configured by adjusting a spring load. The casing includes a pressure setting spring capable of changing and setting the set pressure, and a driven rotating shaft capable of rotating a pressure adjusting screw capable of adjusting a spring load applied to the pressure setting spring. A pressure control device comprising a drive rotary shaft that transmits rotation to a driven rotary shaft,
A fixed mount for positioning the drive rotary shaft is provided;
The fixed gantry includes a support portion that positions the casing at a position where the driven rotation shaft can be connected to the drive rotation shaft;
A guide portion for guiding the casing to the drive rotation shaft side in a state in which the position of the driven rotation shaft matches the position of the drive rotation shaft;
A pressure control device provided with a rotating shaft connecting portion for connecting the driven rotating shaft and the driving rotating shaft.   The rotary shaft coupling portion is provided with a first external fitting fixing member for externally fixing the driven rotational shaft and a second external fitting fixing member for externally fixing the driving rotational shaft, and the second external fitting. The rotation member which externally fixes and fixes the said rotating shaft connection part with respect to the said drive rotating shaft by the rotation operation from the outside, or cancels external fitting fixation is provided in the fixing member. Pressure control device. The rotary shaft connecting portion includes a first external fitting fixing member that externally fixes the driven rotary shaft, a manual rotary operation member that can rotate the driven rotary shaft about its axis, and the manual rotary operation member And a second external fitting fixing member for externally fixing the driving rotary shaft.
The first outer fitting fixing member and the manual rotation operating member are configured to be connectable and separable,
5. The pressure control device according to claim 4, wherein the support portion is provided with an opening portion having a diameter larger than a diameter of the first external fitting fixing member in an axial diameter direction of the drive rotation shaft.   The rotating shaft connecting portion is provided with a sliding connecting member that connects the first external fitting fixing member and the manual rotation operating member so as to be slidable in the axial direction of the drive rotating shaft. Item 7. The pressure control device according to Item 6. The fixed gantry includes a positioning and fixing mechanism that prevents the casing supported by the support portion from being detached from the support portion in the axial direction of the driven rotation shaft.
The pressure control device according to any one of claims 4 to 7, wherein the casing can be rotated around an axis of the driven rotation shaft in a state where the positioning and fixing mechanism is operated.

Images