JP2005147222A - Temperature sensitive valve - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a temperature sensitive valve with a cleaning function for easily and reliably cleaning and removing scales deposited and accumulated on a valve port portion. <P>SOLUTION: The temperature sensitive valve comprises a body 1 having a fluid inlet 1a and a fluid outlet 1b, a valve seat member 4 having a valve port 41, a valve element 51 for opening/closing the valve port 41, and a temperature sensitive driver 7 for driving the valve element 51 in response to the temperature of fluid. Herein, a cleaning tool 100 is provided which is supported on the body 1 retractably in the direction of the axial center corresponding to the moving direction of the valve element 51. When rotated around the axial center at a moving position, it scuffs on an inner peripheral face 11b of a communication passage 11 ranging to the valve port 41 of the valve seat member 4 for cleaning the scales S2 causing clogging, deposited and accumulated on the inner peripheral face 11b. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a temperature-sensitive valve that can easily clean and remove scales such as rust and scale which mainly adhere to and accumulate around a valve port and cause a decrease in the discharge flow rate of a fluid and clogging.

  In general, oil pipes that feed oil such as heavy oil are indirectly wound with oil in the oil pipe by winding a steam pipe (copper pipe trace) around its circumference and passing steam through the steam pipe. The oil is heated to reduce the viscosity of the oil so that it can flow smoothly. The steam flowing in the steam pipe is lowered in temperature by heat exchange with oil, and a part of the steam is drained to generate condensate. These condensate is a temperature control composed of a temperature-sensing valve arranged at an appropriate position of the steam pipe. It is discharged to the outside by a trap.

  By the way, in consideration of the thermal conductivity with respect to the oil feeding pipe, many copper pipes having excellent thermal conductivity are used for the steam pipe. However, this copper tube is prone to rust, and adheres and accumulates on the valve part of the temperature control trap (especially around the valve port) as a scale along with dust and scale. If the scale adheres and accumulates on the valve portion in this manner, the discharge flow rate of the fluid is reduced and clogging occurs, making it difficult to discharge the condensate to the outside, so that it does not function normally as a temperature control trap.

For this reason, in order to keep the temperature control trap functioning normally, the scale deposited on the valve part is cleaned and removed from time to time. Conventionally, as a temperature control trap with the function of cleaning and removing such a scale, The following are known. That is, the valve shaft is connected to the adjustment rod so as to rotate in accordance with the rotation of the adjustment rod, the blade is provided at the portion of the valve shaft facing the inner wall of the valve body fitting hole where the valve port opens, and the adjustment rod is There is a temperature control trap in which the scale attached to the inner wall of the valve body fitting hole can be deleted with the blade by rotating the valve shaft (see, for example, Patent Document 1).
JP 2002-372166 A

  However, according to the prior art, as shown in FIG. 8, by rotating the valve shaft 80, the blade 82 provided at the tip thereof is rotated in the axial direction and pushed down from above to delete the scale. However, at this time, the scale that can be deleted by the blade 82 is mainly limited to the scale S1 that adheres and accumulates on the inner wall 81a of the valve body fitting hole 81. However, experience has shown that the scale generated in this species temperature control trap has a lot of scale S2 deposited and deposited near the valve opening 83, which is closer to the valve body 84, rather than the scale S1. This will cause a decrease in fluid discharge flow rate and a major cause of clogging. Even though the blade 82 can remove the scale S1, the scale S2 at the valve port 83 cannot be removed. Therefore, this scale S2 has been conventionally disassembled and removed from the temperature control trap, but it takes time and effort and is not efficient in terms of maintenance.

  Therefore, an object of the present invention is to provide a temperature sensitive valve with a cleaning function capable of easily and reliably cleaning and removing the scale deposited and deposited on the valve port portion.

  In order to achieve the above object, a temperature sensitive valve of the present invention comprises a body having a fluid inlet and outlet, a valve seat member having a valve port, a valve body for opening and closing the valve port, and a temperature of the fluid. In response to the temperature-sensitive drive body that drives the valve body, and by being rotated around the axis at a position where the body is supported so as to advance and retract in an axial direction that matches the moving direction of the valve body, And a cleaning tool that rubs and cleans the inner peripheral surface of the communication passage that communicates with the valve port of the valve seat member.

  According to this configuration, the cleaning tool is entered from below so as to rub against the inner peripheral surface of the communication passage connected to the valve port of the valve seat member, and adheres to and accumulates on the inner peripheral surface of the communication passage. The scale that causes clogging can be removed. Moreover, the scale adhering to the valve body can also be removed by rotating the tip of the cleaning tool in contact with the valve body. Moreover, when the cleaning tool is not used, it is retracted from the valve port so that the fluid flow is not hindered. Furthermore, the cleaning tool can be advanced and the valve body pushed up at the tip of the cleaning tool to forcibly open and blow.

  In a preferred embodiment of the present invention, the cleaning tool is detachably supported on the body.

  According to this configuration, in applications that do not require a cleaning tool, it can be removed, so the versatility of the temperature sensitive valve is improved.

  In a preferred embodiment of the present invention, the cleaning tool includes a bush coupled to the body by a taper screw, and is supported by the bush so as to be movable forward and backward in the axial direction and rotatable about the axial center. And a polishing member for rubbing the inner peripheral surface of the.

  According to this configuration, when replacing a deteriorated polishing member after a certain period of time, it is sufficient to remove the polishing member from the bush and replace it with a new one without replacing the bushing itself. In addition, the cost of parts can be reduced by minimizing the number of discarded parts.

  In the temperature sensitive valve unit of the present invention, a body having a fluid inlet and outlet, a valve seat member having a valve port, a valve body for opening and closing the valve port, and the valve body according to the temperature of the fluid. A temperature-sensitive driving body to be driven; an insertion hole provided in the body; a closing plug that is detachably attached to the insertion hole; and a valve opening in the valve seat member that is inserted from the opened insertion hole And a cleaning tool that enters into the communication path that continues to and rubs and cleans the inner peripheral surface of the communication path.

  According to this configuration, the fluid can be prevented from leaking by closing the insertion hole with the closing plug when not cleaning, and the cleaning tool inserted through the opened insertion hole can be operated by removing the closing plug when cleaning. Thus, the scale adhering to the inner peripheral surface can be removed by rubbing the inner peripheral surface of the communication passage, and the scale adhering to the valve body can be removed and blown by forced opening. Thus, since the cleaning tool is a plug and unit for closing that can be detachably attached to the insertion hole provided in the body, assembly and maintenance with the temperature sensitive valve are facilitated.

  According to the temperature sensitive valve of the present invention, the cleaning tool is caused to enter from the lower side so as to rub the inner peripheral surface of the communication passage connected to the valve opening of the valve seat member, and is deposited and deposited on the inner peripheral surface of the communication passage. It is possible to clean the scale that causes a decrease in the amount of clogging and clogging, and it is also possible to clean the valve body and blow by forced opening. Moreover, when the cleaning tool is not used, it is retracted from the valve port so that the fluid flow is not hindered. In addition, according to the temperature-sensing valve unit that includes a closing plug and a cleaning tool as a set, fluid leakage can be prevented by closing the insertion hole with the closing plug when not cleaning. Assembly and maintenance can be performed easily and efficiently.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view of a temperature sensitive valve according to a first embodiment of the present invention. The temperature sensing valve shown in the figure includes a body 1 having a fluid inlet 1a and an outlet 1b for a fluid such as steam on both the left and right sides, and a cover 2 detachably screwed to an upper opening of the body 1, A cap 3 that covers the upper portion of the cover 2 is provided.

  Inside the body 1 is a valve seat member 4 screwed to the bottom thereof, a valve seat fitted to the valve seat member 4 and supported so as to be movable in the vertical direction, and a valve body 51 provided on the lower end side. A rod 5 is arranged, and the upper end side of the valve stem 5 is supported by an adjustment guide 6, and this adjustment guide 6 is screwed into a screw hole of the cover 2 and fixed by a lock nut 21. Is sealed by an O-ring 6a. By adjusting the movement of the adjustment guide 6 in the vertical direction, the height position of a temperature-sensitive drive body 7 to be described later in the body 1 can be adjusted as appropriate, and the spring reaction force of the return coil spring 9 can be adjusted. The valve seat member 4 has a valve port 41 at its lower portion, and the valve port 41 is opened and closed by a valve body 51 at the lower end thereof by the vertical movement of the valve rod 5.

  A temperature-sensitive drive body 7 that drives the valve body 51 up and down in accordance with the temperature of the fluid is disposed on the valve stem 5 below the adjustment guide 6 so as to be movable up and down. The temperature sensitive driving body 7 is composed of a bimetal laminate in which a plurality of bimetals are laminated. Further, a spring receiving member 8 is attached to the lower side of the temperature sensitive driving body 7, and a return coil spring 9 is interposed between the spring receiving member 8 and the bottom portion in the body 1. Here, as the bimetal laminated body constituting the temperature-sensitive drive body 7, for example, a pair of two is set so that a high expansion member such as Cu is located on the outside side and a low expansion member such as Ni is located on the inside side. A plurality of sets, which are formed as a set of two, are fitted into the valve stem 5, and the lower end portion of the temperature sensitive driving body 7 is supported on the upper surface of the spring receiving member 8.

  The fluid inflow port 1a and the inside of the body 1 communicate with each other via an introduction side communication hole 10, and the fluid discharge port 1b and the inside of the body 1 communicate with each other extending downward from the valve port 41. The passage 11 and the communication passage 11 communicate with each other via a lead-out side communication hole 12 that branches from the middle to the side.

  A taper screw hole 11a facing the communication path 11 is formed through the lower portion of the body 1, and a cleaning tool 100 is attached to the taper screw hole 11a. The cleaning tool 100 includes a bush 13, a polishing member 14, and a movement amount regulating plate 16. The bush 13 is set to be detachable from the body 1 by being screw-coupled to the taper screw hole 11a by the taper screw 13a.

  The polishing member 14 is provided with a shaper portion 14a at the distal end and a disc-like handle portion 14b at the proximal end side. The polishing member 14 is inserted into the central hole of the bush 13 and matches the moving direction of the valve element 41. It has a structure that can be moved back and forth in the axial direction and supported so as to be rotatable around the axial center manually.

  A movement amount restricting plate 16 for restricting the movement amount of the handle portion 14b of the polishing member 14 is screwed to the bush 13 to prevent the shaper portion 14a from moving excessively upward by the operation of the handle portion 14b. ing. As shown in FIG. 2, the tip of the shaper portion 14a is formed by a plurality of separation pieces 14c separated in the circumferential direction by a plurality of slits extending in the axial direction. In addition, the handle portion 14b at the base end of the shaft portion of the polishing member 14 is knurled on the outer peripheral surface so that it can be easily rotated by hand. A stepped portion 14e is provided for locking the polishing member 14 so that it does not fall off. An O-ring 15 is interposed between the bush 13 and the movement amount regulating plate 16 to improve liquid tightness so that liquid leakage does not occur.

  Next, the operation when the temperature sensing valve according to such a configuration is used as a steam trap will be described with reference to FIG. When the temperature of the steam flowing into the body 1 from the inlet 1a or the fluid mixed with steam and condensate is equal to or higher than a predetermined value, each thermal expansion element (each bimetal group) of the temperature-sensitive drive body 7 expands and moves up and down. Deforms in a curved shape (in the axial direction). The spring receiving member 8 is pressed downward by the deformation of the temperature sensitive driving body 7, and the return coil spring 9 arranged in the axial direction is compressed. The compression of the return coil spring 9 causes the valve stem 5 to descend in the axial direction, and the valve opening 41 is closed by the valve body 51 at the tip of the valve stem 5.

  On the other hand, when the amount of condensate flowing into the body 1 increases and the temperature of the fluid in the body 1 falls below a predetermined temperature, the amount of deformation of the temperature-sensitive drive body 7 in the vertical direction is small, As the coil spring 9 expands, the valve stem 5 rises in the axial direction, the valve body 51 that has blocked the valve opening is separated upward from the valve opening 41, and the valve opening 41 is opened. Thereby, the condensate is discharged from the discharge port 1b through the outlet side communication hole 12.

  As described above, when the temperature sensing valve is used as a steam trap, scale S2 such as scale or scale adheres and accumulates with time in the communication passage 11 connected to the downstream side of the valve port 41, and is deposited on the surface of the valve body 51. In some cases, the scale S3 adheres and accumulates, which narrows the flow path and causes a decrease in the discharge flow rate and clogging. Such scales S2 and S3 are periodically removed by the cleaning tool 100. That is, the handle member 14b of the cleaning tool 100 is operated to rotate the polishing member 14 and push it forward in the axial direction that matches the moving direction of the valve element 41. At this time, the shaper portion 14a at the tip of the polishing member 14 moves by rubbing the inner peripheral surface 11b of the narrowest portion of the communication path 11, and the scale S2 attached to the inner peripheral surface 11b is scraped off and removed by the separation piece 14c. . The polishing member 14 is further pushed up toward the valve body 51, and the tip of the shaper portion 14a is brought into contact with the valve body 51 and rotated to remove the scale S3 on the surface of the valve body. Further, the valve element 51 can be pushed up by the tip of the shaper portion 14a of the polishing member 14 to forcibly open and blown. After cleaning or when not cleaning, the handle portion 14b is returned to the original position and the cleaning tool 100 is retracted from the valve port 41 so that the fluid flow is not obstructed, and the cleaning tool 100 waits for the next use. Be made. In the cleaning tool 100, when the deteriorated cleaning tool 100 is replaced, it is sufficient to remove the polishing member 14 from the bush 13 and replace it with a new one without replacing the bush 13 and the movement amount regulating plate 16. The replacement work is facilitated, and the number of discarded parts is minimized so that the cost of the parts can be kept low. Since the amount of the scale S3 on the surface of the valve body 51 is small, the cleaning of the valve body 51 can be omitted.

  FIG. 3 shows a temperature sensitive valve according to the second embodiment. The basic configuration of the second embodiment is the same as that of the first embodiment, and the description of the same parts is omitted, and only the differences are described. As shown in FIG. 3, the cleaning tool 101 is moved in the axial direction through a bushing 13 </ b> A screwed to the tapered screw hole 11 a at the lower part of the body 1 by a taper screw 13 a and an O-ring 15 in the bush 13 </ b> A. A polishing member 14A that is supported and inserted into the body 1 is provided. The movement amount regulating plate 16 in FIG. 1 is not provided. Seal tape 17 is wound around the taper screw 13a on the outer surface of the bush 13A, and sealing processing is performed, so that liquid tightness is enhanced so that no liquid leakage occurs when the bush 13A is attached to the taper screw hole 11a. Yes. Further, the disc-shaped handle portion 14d at the base end of the shaft portion of the polishing member 14A shown in FIG. 4 is knurled on the outer peripheral surface so that it can be easily rotated by hand. The intermediate portion is provided with a stopper 14f that locks the polishing member 14A so as not to fall off from the bush 13A.

  The tip of the polishing member 14A on the insertion side into the body 1 is a blade portion 14g having a thin blade shape as shown in FIG. 5, and is continuously connected while rotating the handle portion 14d shown in FIG. When inserted into the passage 11, it advances while rubbing the inner peripheral surface 11b of the communication passage 11, and the scale S2 can be efficiently scraped off by the blade portion 14g.

  Similarly to the case of the first embodiment, when the temperature sensitive valve according to the second embodiment is used as a steam trap, the scale S2 such as scale or scale is formed in the communication passage 11 connected downstream of the valve port 41 over time. Therefore, the scale S2 is periodically removed by the cleaning tool 101. In other words, the handle 14d of the cleaning tool 101 is operated to rotate the polishing member 14A and push it forward in the axial direction that matches the moving direction of the valve element 41. At this time, the blade portion 14g at the tip of the polishing member 14A moves while rubbing the inner peripheral surface 11b of the communication path 11, so that the scale S2 adhering to the inner peripheral surface 11b is scraped off and removed. Further, the scale S3 on the surface of the valve body 51 is also removed at the tip of the blade portion 14g. When the cleaning tool 101 is not used, the handle portion 14d is returned to the original position and the cleaning tool 101 is retracted from the valve port 41 so that the fluid flow is not obstructed. To be waited for. Even in this cleaning tool 101, when the deteriorated cleaning tool 101 is replaced, it is sufficient to remove the polishing member 14A from the bush 13A and replace it with a new one without replacing the bush 13A itself. In addition, the cost of parts can be kept low by minimizing waste parts.

  The third embodiment shown in FIG. 6 is a unit type in which a cleaning tool 102 is detachably attached to the taper screw hole 11a and can be manually rotated around an axis during cleaning. The basic configuration of the third embodiment is also the same as that of the first embodiment. The description of the same parts is omitted, and only the differences are described. As shown in FIG. 6, an insertion hole 11c facing the communication passage 11 is formed through the lower portion of the body 1, and a cleaning tool 102 inserted into the body 1 from the insertion hole 11c. It is supported detachably. The cleaning tool 102 includes a polishing member 23 and a cylindrical guide body 24 that guides the polishing member 23. A brush 23 a is provided at the tip of the polishing member 23, and a handle portion 23 b is provided at the base, and the polishing member 23 is inserted into the guide hole 24 a of the guide body 24.

  Although the temperature sensing valve concerning the said structure is the case where it aims at the cleaning of a scale, Comprising: The case where the cleaning tool 102 was inserted and attached from the insertion hole 11c of the bottom face of the body 1 was demonstrated, when not cleaning (before cleaning) The user who does not need cleaning or removes the cleaning tool 102 from the body 1 and attaches the closing plug 20 shown in FIG. 7 to the insertion hole 11c.

  In the case of the third embodiment, at the time of cleaning, the plug 20 of FIG. 7 is first removed from the lower part of the valve. Subsequently, the polishing member 23 </ b> B is inserted from the guide hole 24 a of the guide body 24, and the brush 23 a at the tip is introduced into the body 1. At this time, while the handle portion 23b is rotated in the axial direction, the polishing member 23 is pushed along the guide hole 24a so as to rub the inner peripheral surface 11b of the communication passage 11 connected to the valve port 41. Thereby, the brush 23a is rubbed against the inner peripheral surface 11b and the valve port 41, and the scale S2 adhering to the inner peripheral surface 11b is scraped off and cleaned. In this case, unlike the case of the first and second embodiments, the tip of the polishing member 23 is a brush 23a, so that not only the inner peripheral surface 11b of the communication path 11 but also the valve body 51 with respect to the valve seat member 4 The entire surface of the seating part can be cleaned, and there is little risk of scratching these parts. After cleaning or when not cleaning, the cleaning tool 102 is removed and the open insertion hole 11c is closed with the plug 20 in FIG. 7 to prevent fluid leakage. Since this cleaning tool 102 is a unit with a closing plug 20 that is detachably attached to the insertion hole 11c provided in the body 1, assembly and maintenance with the temperature sensitive valve are facilitated. For users who do not need cleaning, the plug 20 for closing attached to the insertion hole 11c may be attached as it is without being removed, and any of them can be freely selected according to the user's request.

It is a longitudinal cross-sectional view of the temperature sensitive valve which concerns on 1st Embodiment of this invention. It is a perspective view which expands and shows the shaper part of a polishing member. It is a longitudinal cross-sectional view which shows the temperature sensitive valve which concerns on 2nd Embodiment of this invention. It is a longitudinal cross-sectional view which expands and shows a bush and a cleaning tool. It is a side view which shows the blade part of the cleaning tool front-end | tip. The temperature sensing valve which concerns on 3rd Embodiment of this invention is shown, and it is a longitudinal cross-sectional view after cleaning tool mounting | wearing. The temperature sensing valve which concerns on 3rd Embodiment of this invention is shown, and it is a longitudinal cross-sectional view after plug attachment. It is a figure which shows the conventional scale cleaning condition typically.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Body 1a Inlet 1b Outlet 4 Valve seat member 41 Valve port 51 Valve body 7 Temperature-sensitive drive body 11 Communication path 11b Inner peripheral surface 100, 101, 102 Cleaning tool 14, 14A, 23 Polishing member 13, 13A Bush 24 Guide Body S2, S3 scale

Claims (4)

A body having a fluid inlet and outlet;
A valve seat member having a valve opening;
A valve body for opening and closing the valve opening;
A temperature-sensitive drive body that drives the valve body in accordance with the temperature of the fluid;
The inner circumference of the communication passage connected to the valve port in the valve seat member is supported by the body so as to be able to advance and retract in the axial direction matching the moving direction of the valve body and rotated around the axial center at the advanced position. A cleaning tool that rubs and cleans the surface;
A temperature sensitive valve.   2. The temperature sensing valve according to claim 1, wherein the cleaning tool is detachably supported by the body.   2. The cleaning tool according to claim 1, wherein the cleaning tool is supported by a bush coupled to the body with a taper screw, and is supported by the bush so as to be movable forward and backward in the axial direction and rotatable about the axial center. A temperature sensitive valve having a polishing member for rubbing the surface. A body having a fluid inlet and outlet;
A valve seat member having a valve opening;
A valve body for opening and closing the valve opening;
A temperature-sensitive drive body that drives the valve body according to the temperature of the fluid;
An insertion hole provided in the body, a closing plug that is detachably attached to the insertion hole, and a communication path that is inserted from the opened insertion hole and that communicates with the valve port of the valve seat member. A cleaning tool for rubbing and cleaning the inner peripheral surface of the passage;
Temperature-sensing valve unit with

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