JP4562652B2 - Spear tube assembly disassembly and assembly equipment - Google Patents

Description

  The present invention relates to an apparatus for disassembling and assembling a spear tube assembly used in a spear valve such as a draft beer barrel.

  A pressure vessel valve called a spear valve is detachably attached to an upper portion of a pressure vessel such as a draft beer barrel. Such a spear valve includes a body that is screwed into a base of a pressure vessel, and a spear tube assembly in which an upper portion is accommodated in the body. A spear tube assembly includes a spear tube provided with a top flange at the tip and a spring receiver radially projecting at the side, a main seal packing mounted under the top flange of the spear tube, and a main seal packing And a coil spring inserted between the washer and the spring receiver, and the main seal packing is pressed against the top flange of the spear tube by a repulsive force against the compression of the coil spring. It has been.

  As a device for assembling such a spear tube assembly, a main seal packing is placed on a mounting surface of a tip fitting having a cylinder disposed at the lower portion, a washer is placed on the main seal packing, and a coil spring is placed thereon. Place the spear tube with the top flange facing down, push up the tip bracket, raise the main seal packing, washer and coil spring with respect to the spear tube and push it up to the top flange of the spear tube. There is a device to be mounted on the device (see Patent Document 1).

  In addition, as a device for disassembling the spear tube assembly, the spear tube assembly is fixed with the top flange facing down, and the metal rod is directed from the top surface to the main seal packing while holding the main seal packing from the outer periphery. There is an apparatus that separates the main seal packing and the washer by pushing up only the washer and the coil spring to separate the spear tube assembly (see Patent Document 2).

Furthermore, as a device for exchanging the main seal packing of the spear tube assembly, the spear tube is fixed to the base with the top flange facing up, and the holding plate is inserted and fixed between the washer and the main seal packing. Is moved in the axial direction of the spear tube, the spear tube and the main seal packing are pushed up to separate the main seal packing and the washer, the main seal packing is removed by the packing removing means, and there is a device for attaching (Patent Document) 3).
JP 2000-25814 A JP 2000-25813 A JP 2000-109194 A

  However, the device described in Patent Literature 1 can assemble a spear tube assembly but cannot disassemble it. Since the main seal packing is destroyed, the apparatus described in Patent Document 2 cannot be reused even when the main seal packing is not deteriorated. The spear tube assembly can be disassembled but cannot be assembled. Even if the apparatus described in Patent Document 3 can replace the main seal packing, the coil spring and the washer cannot be detached from the spear tube and disassembled, and these inspections and replacements cannot be performed.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a disassembly and assembly apparatus that can disassemble and assemble a main seal packing and a coil spring from a spear tube without destroying them in a spear tube assembly for a pressure vessel valve.

  In the present invention, the main seal packing (6) disposed on the spear tube (4) is interposed between the spring receiver (8) of the spear tube (4) and the main seal packing (6). A disassembly / assembly device (10) for a spear tube assembly (3) that presses against a top flange (5) of the spear tube (4) with a predetermined pressure using a repulsive force against compression of a coil spring (9), Tube support means (14) for supporting the spear tube (4) from the spring receiver (8) side, and a spring presser (33) that can be inserted between the main seal packing (6) and the coil spring (9). ), The spear tube (4) is supported by the tube support means (14), and the main seal packing (6) is connected to the top flange ( ) In the first position where the spring retainer (33) faces between the main seal packing (6) and the coil spring (9). From (A), the second position (B) displaced in the direction of increasing the compression amount of the coil spring (9) relative to the first position (A), and the first position (A) Also, a spear tube assembly (3) comprising spring pressing drive means (20, 22) for driving each to a third position (C) displaced in the direction of decreasing the compression amount of the coil spring (9). The above-described problems are solved by the disassembly / assembly apparatus (10).

  According to the disassembling and assembling apparatus of the present invention, the spear tube is supported by the tube supporting means in a state where the main seal packing is pressed against the top flange at a predetermined pressure, and the spring presser is in the first position as the main seal packing. The main seal packing can be removed from the spear tube while being inserted between the coil spring and pushed down to the second position by the spring pressing drive means and the main seal packing is released from the predetermined pressure. Further, after the main seal packing is further removed, the spring spring can be further raised to the third position by the spring pressing drive means, and the coil spring can be removed from the spear tube in a state where the coil spring is in a non-pressure state. . The spear tube assembly can be assembled by attaching the coil spring and the main seal packing to the spear tube by the reverse procedure.

  In one embodiment of the present invention, two arms (32) that can pivot horizontally in directions toward and away from each other about an axis, and a guide slit extending in the horizontal direction through which the other end of the arm (32) is inserted. An arm guide plate (27) provided with a spring, and the spring retainer (33) has a cross-sectional wedge shape with the central portion cut into a semicircular shape, and is attached to opposite sides of each arm (32). And each arm (32) may be a semi-circular member that forms a ring shape when combined with each other.

  According to this, the other end of the arm is moved horizontally along the guide slit from the outside of the arm guide plate, and the arm is horizontally swiveled in a direction approaching each other about the axis, so that the spring retainer is moved to the main seal packing and the coil spring. Can be inserted between. According to this, since the horizontal movement of the arm is guided by the guide slit, the spring presser can be easily disposed between the main seal packing and the coil spring. Further, since the spring presser becomes an annular shape when the arms are brought close to each other, the spring can be suppressed with an equal force when placed on the upper part of the spring.

  In one embodiment of the present invention, the spring pressing drive means (20, 22) moves the spring pressing (33) in the axial direction of the spear tube (4), and a first air cylinder (22), It may be a second air cylinder (20) that moves the first air cylinder (22) in the axial direction of the spear tube (4). Then, the spring retainer (33) is driven to the first position (A) by setting the first air cylinder (22) in a non-operating state and the second air cylinder (20) in a working state. Then, the first air cylinder (22) is driven to the second position (B) by setting the first air cylinder (22) to the operating state and the second air cylinder (20) to the operating state. 22) may be driven to the third position (C) by setting the second air cylinder (20) to a non-operation state and the second air cylinder (20) to a non-operation state. According to this, it is possible to easily and inexpensively realize a three-stage position of the spring retainer, that is, the first position, the second position, and the third position.

  Furthermore, according to an aspect of the present invention, the tube support means (14) is provided with an openable / closable safety cover (19). When the safety cover (19) is opened, the first air cylinder is provided. (22) and the second air cylinder (20) are both evacuated and inactive, the spring retainer (33) is in the third position (C), and the first air cylinder (22) and the motive power air of the second air cylinder (20) may be shut off and become inoperable. According to this, since both air cylinders do not enter the operating state when the safety cover is opened, the coil spring does not pop out and is safe even when the spring retainer is displaced from the coil spring.

  In addition, in the above description, in order to make an understanding of this invention easy, the reference sign of the accompanying drawing was attached in parenthesis, but this invention is not limited to the form of illustration by it.

  As described above, according to the disassembly and assembly apparatus of the present invention, it is possible to separate and assemble the main seal packing and the coil spring from the spear tube without destroying them. Therefore, these parts can be inspected. Further, since the operation is simple and skill is not required, the processing performance is high because the operation is simple, and the spring presser can be removed while the compression force of the coil spring is not compressed, so that the safety is high.

  FIG. 1 is a view showing a spear valve 1 attached to a pressure vessel such as a draft beer barrel. As shown in the figure, the spear valve 1 includes a body 2 that is screwed into a base of a draft beer barrel, and a spear tube assembly 3 in which an upper portion is housed in the body 2. The spear tube assembly 3 includes a spear tube 4, a top surface flange 5 provided at the tip of the spear tube 4, a main seal packing 6 provided on the bottom surface of the top surface flange 5, and a bottom surface of the main seal packing 6. A washer 7 provided on the spear tube 4, a spring receiver 8 projecting radially on the outer periphery of the spear tube 4, and a coil spring 9 interposed between the spring receiver 8 and the washer 7. The spear valve needs to be periodically disassembled and inspected because the parts including the main seal packing 6 deteriorate due to use.

  The disassembling / assembling apparatus 10 for the spear tube assembly 3 according to one embodiment of the present invention is an apparatus for disassembling and assembling such a spear valve 1, and FIG. 2 is a schematic perspective view thereof. In the present specification, “front” refers to the front side of FIG. 2, and “upper and lower” refers to the upper and lower sides in FIG.

  As illustrated, the disassembly / assembly apparatus 10 includes a base 11 on which other components of the disassembly / assembly apparatus 10 are placed. The base 11 is a table supported by four legs 12, and a circular hole 11 a is provided at a predetermined position in front of the base 11. Further, a cylindrical body 14 which is a tube supporting means having the same inner diameter as the circular hole 11a is welded with the center of the circular hole 11a being the same. Further, a rectangular side wall 15 extending vertically upward is attached to a predetermined rear portion of the base 11 via a mounting block 16.

  A rectangular parallelepiped upper block 18 is fixed to the front side of the upper end of the side wall 15. A safety cover 19 having a part of the side surface attached to the front side portion of the upper block 18 is disposed on the front side portion of the upper block 18 so as to be rotatable about the attachment portion 19c. The safety cover 19 has a rectangular frame 19a in which a transparent window 19b made of plastic or the like that is hard to break is fitted. The horizontal cover position where the safety cover 19 protrudes on the cylindrical body 14 and the mounting portion The other end is turned up around 19c, and can be kept stationary at any position of the substantially non-covered position.

  A second air cylinder 20 is attached below the upper block 18. The second air cylinder 20 is contracted in a non-operating state in which no air is supplied, and extends downward in an operating state in which air is supplied. A middle block 21 is attached below the second air cylinder 20. In addition, a first air cylinder 22 is attached under the middle block 21, and the first air cylinder 22 is also in a contracted state in a non-operating state in which no air is supplied, and the function in which air is supplied. In the state, it extends downward.

  A lower block 23 is attached further below the first air cylinder 22. A first suspension plate 25 extends horizontally from the side of the lower block 23. At the tip of the first suspension plate 25, an arm guide plate 27, which is a rectangular plate material and is provided with a lateral guide slit 27a in the lower portion, is fixed with a bolt. In addition, arm fixing grooves 27b are provided at two locations on the upper side of the guide slit 27a. Note that the lower end of the arm guide plate 27 floats from the base 11.

  Further, a second suspension plate 29 extends obliquely forward from the front side portion of the lower block 23 opposite to the side on which the first suspension plate 25 is attached, and the tip of the second suspension plate 29 is provided. An arm shaft 31 is attached to the arm shaft 31 and extends downward. The arm shaft 31 is attached with two arms 32 and 32 that can turn horizontally in the direction approaching and separating from each other with the arm shaft 31 as an axis. Note that the lower end of the arm shaft 31 also floats from the base 11.

  The spring retainers 33, 33 attached to both arms 32, 32 are made of a semicircular member having a wedge-shaped cross-section with the central portion cut into a semicircular shape, and are combined into an annular shape when the arms 32, 32 are brought close to each other. It becomes.

  The tips of the two arms 32, 32 extend to the opposite side of the arm guide plate 27 through the guide slit 27 a of the arm guide plate 27 described above. The spring retainers 33 and 33 can be moved by horizontally moving the tips of the arms 32 and 32 along the guide slit 27a.

  Further, an upper end of a spring 37 attached to an upper end of a spring holding member 36 extending from the base 11 is attached to the lower surface of the lower block 23. The lower block 23 is biased upward by the spring 37.

  Further, a mechanical valve 39 is attached to the side of the upper block 18. The mechanical valve 39 is connected to the safety cover 19, and the power air of the second air cylinder 20 and the first air cylinder 22 is shut off at the non-cover position where the safety cover 19 is opened, and the secondary air also escapes at the same time. The second air cylinder 20 and the first air cylinder 22 cannot be operated.

  An upper handle 40 for operating the second air cylinder 20 and a lower handle 41 for operating the first air cylinder 22 are provided on the side of the base 11 opposite to the side where the arm guide plate 27 is located. The attached handle mounting base 42 is fixed. When the upper handle 40 is moved downward, the second air cylinder 20 is extended and the middle block 21 is moved downward. When the lower handle 41 is moved downward, the first air cylinder 22 is extended and the lower block 23 is moved downward. To do.

  Hereinafter, the work of disassembling the spear tube assembly 3 by the disassembly / assembly apparatus 10 of the present embodiment will be described with reference to FIG. First, the spring receiver 8 side at the lower end of the spear tube 4 of the spear tube assembly 3 from which the body 2 has been removed is inserted into the cylindrical body 14. The safety cover 19 is lowered and both cylinders 20 and 22 are made operable. Then, the upper handle 40 is moved downward to bring the second air cylinder 20 into an operating state, and the middle block 21 is lowered. The lower handle 41 remains in the upper position, the first air cylinder 22 is in an inoperative state, and the lower block 23 is in a position raised with respect to the middle block 21. As a result, the vertical position of the spring retainer 33 is the first position A shown in FIG. 3A facing the main seal packing 6 and the washer 7. In this state, while observing from the top of the safety cover 19 through the window 19b, the arms 32 and 32 are operated from the outside of the arm guide plate 27, and the spring pressers 33 and 33 attached to the arms 32 and 32 are brought close to each other. The spear tube assembly 3 is inserted between the washer 7 and the main seal packing 6. This state is the state shown in FIG.

  Next, the lower handle 41 is moved downward to bring the first air cylinder 22 into an operating state, and the lower block 23 is lowered with respect to the middle block 21. As a result, the spring retainer 33 becomes the second position B shown in FIG. 3B that is displaced in the direction of increasing the amount of compression of the coil spring 9 relative to the first position A. As illustrated, when the lower block 23 is lowered, the spring retainer 33 is lowered while pressing the washer 7, the coil spring 9 is compressed, and the washer 7 and the main seal packing 6 are separated. Thus, in a state where the washer 7 and the main seal packing 6 are separated, the main seal packing 6 can be easily detached from the spear tube 4. In this case, when the main seal packing 6 is hardened due to deterioration, a dedicated jig or the like can be used. In this case, the portion fixed to the arm shaft 31 of the arm 32 by the first air cylinder 22 and the second air cylinder 20 is pressed downward, but the arm 32 is compressed by the compression force of the spring 9. A force is applied to the portion where the 32 spring retainers 33, 33 are attached. For this reason, the other end inserted into the arm guide plate 27 of the arms 32 and 32 is further lifted, and the portion of the arms 32 and 32 inserted into the guide slit 27a is fitted into the arm fixing groove 27b. Accordingly, the horizontal movement of the arms 32 and 32 is limited, and the spring pressers 33 and 33 are not released from the upper part of the washer 7 by being opened by mistake and the coil spring 8 does not jump out.

  Then, with the upper handle 40 raised, the second air cylinder 20 is deactivated, the middle block 21 is raised, the lower handle 41 is also raised, the first air cylinder 22 is deactivated, and the lower block 23 Also raise. As a result, the spring retainer 33 becomes the third position C in FIG. 3C that is displaced in the direction of decreasing the compression amount of the coil spring 9 relative to the first position A. As shown in the figure, the spring retainers 33, 33 are located above the top flange 5 of the spear tube 4, and the coil spring 9 has an uncompressed natural length. In this case, there is no compression force of the coil spring 9 applied to the arm 32. Therefore, the arm 32 is weakly fitted or not fitted into the arm fixing groove 27b, and the guide slit 27a can be easily slid. Then, the spring retainers 33, 33 are shifted from the upper part of the washer 7 by moving both arms 32, 32 away from each other. In this case, since the compression force of the coil spring 9 is not at all as described above, the coil spring 9 and the washer 4 can be removed from the spear tube 4 without jumping upward. Decomposition of the solid 3 can be performed.

  As described above, according to the disassembling and assembling apparatus 10 of the present embodiment, not only the main seal packing 6 but also the washer 7 and the coil spring 9 can be detached from the spear tube 4 and disassembled in the spear tube assembly 3. The member can be inspected.

  Next, the assembly process of the spear tube assembly will be described. First, the upper handle 40 is up, the second air cylinder 20 is inactive, the middle block 21 is in the raised position, the lower handle 41 is up, and the second air cylinder 23 is inactive, so At the third position C where the block 23 is also raised, both arms 32 and 32 are opened and the spear tube 4 is inserted into the cylindrical body 14. A coil spring 9 is inserted into the spear tube 4, and a washer 7 is placed on the coil spring 9. Then, both arms 32, 32 are closed and the spring pressers 33, 33 are arranged on the washer. This state is the same as the state of FIG.

  In this state, the upper handle 40 is moved downward to bring the second air cylinder 20 into an operating state, and the middle block 21 is lowered. In addition, the lower handle 41 is also lowered, the first air cylinder 22 is also in an operating state, and the lower block 23 is lowered with respect to the middle block 21. The arm 32 is slightly moved during the lowering to center the spear tube 4 and the spring pressers 33 and 33 so that the spring pressers 33 and 33 can lower the side surface of the spear tube 4. In the state where the spring retainer 33 is in the second position B, the main seal packing 6 is fitted into the top flange 5 of the spear tube 4. This state is the same as in FIG.

  Then, the upper handle 40 is kept down, the lower handle 41 is turned up, the first air cylinder 22 is deactivated, and the lower block 23 is raised relative to the middle block 21. As a result, the spring retainer 33 is in the first position A. This is the same as the state shown in FIG. Then, the arm 32 is opened and the spear tube assembly 3 is taken out. Thus, according to the disassembly and assembly apparatus 10 of this embodiment, the spear tube assembly 3 can also be assembled.

  According to this embodiment, the vertical position adjustment of the spring retainer 33 can be performed by operating two cylinders in this way, so that the three-stage position adjustment can be performed easily and inexpensively. Further, since the operation direction of each cylinder and the operation direction of the handle for operating the cylinder are the same direction, an operation error can be prevented.

  In addition, this invention may be implemented with a various form, without being limited to the form mentioned above. For example, the method for disassembling and assembling a spear tube assembly in which a washer is provided between the main seal packing and the coil spring has been described. However, the present invention is not limited to this, and the present invention is also applied to a tube assembly in which no washer is provided. Form disassembly and assembly equipment is available.

The fragmentary sectional view of a spear valve. The schematic perspective view of the disassembly / assembly apparatus of the spear tube assembly concerning one form of this invention. The figure which showed the operation | movement which decomposes | disassembles a spear tube assembly using the disassembly / assembly apparatus of this invention.

Explanation of symbols

3 Spear tube assembly 4 Spear tube 5 Top flange 6 Main seal packing 8 Spring receiver 9 Coil spring 10 Disassembly / assembly device 14 Tube support means 19 Safety cover 20 Second air cylinder 22 First air cylinder 27 Arm guide plate 27a Guide slit 31 Arm shaft 32 Arm 33 Spring retainer A First position B Second position C Third position

Claims (5)

The main seal packing disposed on the spear tube is attached to the top flange of the spear tube by utilizing a repulsive force against compression of a coil spring interposed between the spring receiver of the spear tube and the main seal packing. An apparatus for disassembling and assembling a spear tube assembly that is pressed at a predetermined pressure,
Tube support means for supporting the spear tube from the spring receiving side;
A spring retainer that can be inserted between the main seal packing and the coil spring;
When the spear tube is supported by the tube support means and the main seal packing is pressed against the top flange by the predetermined pressure, the spring presser is used as the main seal packing. And a first position facing the coil spring, a second position displaced in a direction to increase the amount of compression of the coil spring relative to the first position, and the first position relative to the first position. A spear tube assembly disassembling / assembling apparatus comprising spring pressing drive means for driving each of the coil springs to a third position displaced in a direction of decreasing the compression amount of the coil spring. Two arms that can pivot horizontally in directions toward and away from each other about an axis;
An arm guide plate provided with a guide slit extending in the horizontal direction through which the other end of the arm is inserted, and
The spring retainer has a cross-sectional wedge shape with a central portion cut into a semicircular shape, is attached to opposite sides of each arm, and is combined with each arm close to each other to form an annular shape. The disassembling / assembling apparatus according to claim 1.   The spring pressing drive means is a first air cylinder that moves the spring pressing in the axial direction of the spear tube, and a second air cylinder that moves the first air cylinder in the axial direction of the spear tube. The disassembly and assembly apparatus according to claim 1 or 2, wherein   The spring retainer is driven to the first position by bringing the first air cylinder into a non-actuated state and the second air cylinder into an actuated state, and the first air cylinder is actuated, The second air cylinder is activated to drive the second position, the first air cylinder is deactivated, and the second air cylinder is deactivated to the third position. The disassembly / assembly apparatus according to claim 3, wherein the disassembly / assembly apparatus is driven.   A safety cover that can be opened and closed is provided above the tube support means, and when the safety cover is open, the air of the first air cylinder and the second air cylinder is removed and both are inactive. 5. The operation according to claim 3, wherein the spring retainer is in the third position, and the power air of the first air cylinder and the second air cylinder is shut off to become inoperable. Disassembly and assembly equipment.

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