JP7320258B2 - Temperature responsive valve with cleaning means - Google Patents

Description

A temperature responsive valve having a cleaning means according to the present application relates to a technology for cleaning foreign matter adhering to the inside of a temperature responsive valve such as a temperature control trap.

In an industrial plant, a piping system is installed to transfer high-temperature steam generated by a boiler to a supply destination, and drain (condensed water) is generated from the steam in this piping. A branch pipe for drain recovery is connected to the main pipe for transferring steam, and the drain is often discharged as waste by a steam trap installed at the end of this branch pipe.

However, in some cases, a temperature control trap as a temperature responsive valve is used instead of the steam trap in order to retain the drain in the branch pipe and adjust the temperature of the branch pipe to a predetermined set temperature. For example, when a high-viscosity fluid such as heavy oil is transported through a transport pipe, if the temperature drops, the heavy oil or the like will solidify. For this reason, a branch pipe through which high-temperature steam or drain flows is arranged along the transport pipe to function as a trace heat transfer pipe, and heat is exchanged with the transport pipe for the heavy oil, etc. to raise the temperature of the heavy oil, etc. and prevent solidification.

Here, for example, in the case of heavy oil, a temperature of about 40 degrees is sufficient for transportation, but the temperature of the steam is over 100 degrees, so if the steam is used as a heat source for the trace heat transfer tube, the temperature of the heavy oil will rise. There is too much danger. Therefore, a temperature control trap is provided at the end of the trace heat transfer tube to adjust the temperature of the trace heat transfer tube to an appropriate set temperature.

A temperature control trap provided at the end of the trace heat transfer tube is formed with a valve chamber into which steam or drain flows from the trace heat transfer tube, and a discharge chamber is further formed below the valve chamber. . The valve chamber and the discharge chamber are connected by a small-diameter valve port, and steam and drain flow through the valve port with the valve chamber side as the upstream side and the discharge chamber side as the downstream side.

A valve shaft having a valve element at its tip is disposed in the valve chamber. The valve body at the tip is positioned toward the valve opening, and a bimetal laminate as a temperature-sensitive member is attached to the valve shaft.

When high-temperature drain flows into the valve chamber, the bimetal laminate expands in response to the high temperature, moving the valve shaft in the axial direction, and the valve body at the tip closes the valve port. After that, when the temperature of the drain drops due to heat exchange with the object to be heated, the bimetal laminate contracts in response to this temperature drop, the valve shaft moves according to the expansion of the return spring, and the valve body opens the valve opening. The low-temperature drain is discharged to the discharge chamber side. In this way, the opening and closing of the valve opening are repeated based on the displacement of the valve shaft, and the temperature of the trace heat transfer tube is kept at a constant reference temperature.

The rear end of the valve shaft protrudes outward from above the temperature control trap, and the valve shaft moves in the axial direction when operated by an operator from the outside to adjust the position of the valve shaft in the valve chamber. . Thereby, the reference temperature in the trace heat transfer tube can be freely set.

By the way, foreign matter such as rust and scale (scale) may flow into the valve chamber of the temperature control trap together with steam and drain. When such foreign matter adheres to and accumulates on or near the valve port, the foreign matter obstructs the flow rate of the drain, making it impossible to properly adjust the temperature of the trace heat transfer tube. In particular, the valve opening of the temperature control trap is formed to have a narrow opening for fine adjustment of the flow rate of the drain, so the influence of adhesion of foreign matter is great. Such foreign matter adheres to the upstream and downstream sides near the valve opening.

As a cleaning technique for removing foreign substances adhering to the vicinity of the valve opening, there is a technique disclosed in Patent Document 1 described later. In this technique, a cleaning tool 63 is threaded through the lower portion of the case 2 of the valve device 1 (Patent Document 1, paragraph [0023], FIG. 1).

When removing scales such as rust and limescale deposited on the valve seat communication passage 14 of the case 2, the handle 76 of the cleaning tool 63 is rotated to rotate the cleaning rod 65 to enter the valve port 51. A shaper portion 79 at the tip of the cleaning rod 65 scrapes off the scale deposited around the valve opening 51 . Such scale cleaning work is performed periodically (Patent Document 1, paragraph number [0027], FIG. 2).

JP 2019-49351 A

The technique disclosed in the aforementioned Patent Document 1 has a problem that the cleaning work of the valve device 1 must be periodically performed by a worker or the like. Scales such as rust and limescale are gradually deposited and accumulated according to the valve operation of the device, but such scales are difficult to see from the outside of the device, making it impossible to perform cleaning work at appropriate timing.

Therefore, a temperature responsive valve having a cleaning means according to the present application aims to solve these problems, and is a temperature responsive valve having a cleaning means capable of frequently and automatically removing foreign matter according to the operation of the valve. The purpose is to provide valves.

A temperature responsive valve having cleaning means according to the present application includes:
A main body that is connected to a piping system that transfers fluid and that has a flow path in which fluid flows from upstream to downstream. a body having a
A shaft portion located inside the body and rotatable about a central axis, the shaft portion having an abrading portion disposed in contact with or in close proximity to the flow path in which the valve opening is located; and a fluid receiving portion provided on the shaft portion for receiving the flow of the fluid to rotate the shaft portion;
It is characterized by having

In the temperature responsive valve having the cleaning means according to the present application, the fluid receiving portion provided on the shaft portion receives the flow of the fluid and rotates the shaft portion. As the shaft rotates, the scraping portion also rotates in contact with or in close proximity to the flow path in which the valve mouth portion is located.

Therefore, according to the flow of the fluid, the scraping unit can automatically scrape off and clean the foreign matter adhering to the flow path where the valve opening is located. Therefore, the foreign matter can be removed frequently and automatically according to the operation of the valve.

1 is a cross-sectional view of a temperature control trap 1 showing a first embodiment of a temperature responsive valve having cleaning means according to the present application; FIG. FIG. 2 is a view of the valve stem 10 shown in FIG. 1 as viewed from the distal end side; 2 is an enlarged cross-sectional view of the vicinity of the valve seat 60 shown in FIG. 1, and is a cross-sectional view showing a state in which the valve is closed to the limit position. FIG. 2 is an enlarged cross-sectional view of the vicinity of the valve seat 60 shown in FIG. 1, and is a cross-sectional view showing a state in which the valve is opened to the limit position. FIG. FIG. 4 is a cross-sectional view of a temperature control trap 11 showing a second embodiment of a temperature responsive valve having cleaning means according to the present application;

The main terms indicated in the embodiments respectively correspond to the following elements of the temperature responsive valve with cleaning means according to the present application.

Temperature control traps 1, 11 Temperature-responsive valves Rotating blades 2, 4 Fluid receiver Rotating blades 2, 4, valve shaft 10, upstream blade 17, downstream blade 18 Cleaning means Guide member 6・Guide part: valve shaft 10... Shaft part: upstream blade 17, downstream blade 18... Scraping part: casing 31, casing lid 32... Main body: inflow path 52... Jet flow path: rear end 52b of inflow path... Jet port Inflow path 52, valve chamber 53, valve seat upstream chamber 61, valve port 62, valve seat downstream chamber 63, bottom chamber 54, outflow path 55 Flow path Valve port 62 Valve port center line L1・・・Center axis Drain, Steam, Air・・・Fluid

[First embodiment]
A first embodiment of a temperature responsive valve having cleaning means according to the present application will be described using a temperature control trap as an example. A temperature control trap is provided at the end of the trace heat transfer tube and has a function of keeping the trace heat transfer tube at a set temperature. Trace heat transfer tubes maintained at a constant set temperature are used as anti-coagulation traces for high-viscosity fluids such as heavy oil, and anti-freeze traces for instrumentation equipment.

(Description of the configuration of temperature control trap 1)
FIG. 1 is a cross-sectional view of a temperature control trap 1 according to this embodiment. The casing 31 is provided with an inflow port 51 and an outflow port 56, and a casing lid 32 is attached to the top by screw connection. The inlet 51 is connected to the end of a trace heat transfer tube (not shown) and the outlet 56 is connected to an outlet tube (not shown). A cylindrical valve chamber 53 is formed in the casing 31 , and the valve chamber 53 communicates with the inflow port 51 through an inflow passage 52 . In the flow path formed in the valve chamber 53, the inflow port 51 side is the upstream side, and the outflow port 56 side is the downstream side.

A valve seat 60 is attached and fixed to the bottom chamber 54 positioned below in the casing 31 by screw connection. 3 and 4 are enlarged views of the vicinity of the valve seat 60. FIG. The valve seat 60 has a valve seat upstream chamber 61 formed on the upstream side of the valve port 62 and a valve seat downstream chamber 63 formed on the downstream side. The valve seat upstream chamber 61 and the valve seat downstream chamber 63 have coaxial cylindrical shapes.

The diameter of the valve port 62 formed as an opening is configured to be smaller than the diameters of the valve seat upstream chamber 61 and the valve seat downstream chamber 63 . The valve chamber 53 communicates with an outflow port 56 via a valve chamber upstream chamber 61 , a valve port 62 , a valve seat downstream chamber 63 , a bottom chamber 54 and an outflow path 55 .

As shown in FIGS. 3 and 4, the valve seat downstream chamber 63 is formed with a ceiling surface 63a continuous with the valve port 62 and a side wall 63b continuous with the ceiling surface 63a. The ceiling surface 63a has a substantially conical shape that slopes from the valve port 62 toward the side wall 63b, and the side wall 63b has a cylindrical shape.

A cylindrical screen 70 (FIG. 1) is provided in the valve chamber 53 for catching foreign matter. The drain that has flowed in from the inflow port 51 passes through the inflow passage 52, passes through the screen 70, and flows into the valve chamber 53 in the direction of the arrow 101. As shown in FIG.

Here, the inflow path tip 52b of the inflow path 52 directly connected to the valve chamber 53 is configured to have a smaller diameter than the inflow path rear end 52a, and the inflow path 52 is configured to gradually narrow toward the valve chamber 53. ing. Therefore, the drain that has passed through the inflow passage 52 is ejected from the inflow passage tip 52b toward the valve chamber 53 with high fluid pressure.

A valve shaft 10 is arranged in the valve chamber 53 so as to be rotatable about the center line L1. FIG. 2 is a view of the valve shaft 10 viewed from the tip side. Eight rotating blades 2 are radially fixed at equal intervals to a portion near the rear end of the valve shaft 10 from the central portion.

In addition, an upstream blade 17 having a thin rectangular parallelepiped shape with a corner portion configured as a blade is integrally formed on the tip side of the valve shaft 10, and the tip of the upstream blade 17 has a conical shape. A valve body 12 having the same is integrally formed. The upstream blade 17 and the valve body 12 are positioned within the valve seat upstream chamber 61 . In this embodiment, the upstream blade 17 is arranged in close proximity to the inner wall of the valve seat upstream chamber 61 serving as the flow path, but it may be arranged in contact therewith. “Proximity” means a state of being close enough to remove foreign matter adhering to the target wall surface.

In this embodiment, a central rod 15 is fixed to the vertex of the valve body 12 , and the central rod 15 is arranged to pass through the valve opening 62 . Since the central rod 15 is formed thinner than the valve port 62, the flow of drain at the valve port 62 is practically not hindered. Further, a downstream blade 18 is integrally fixed to the tip of the center rod 15, and this downstream blade 18 is positioned in the valve seat downstream chamber 63. As shown in FIG. The downstream blade 18 has a thin planar shape, and like the upstream blade 17, the corner portion is configured as a blade.

The downstream blade 18 has a shape corresponding to the cross-sectional shape of the valve seat downstream chamber 63 along the cylindrical axis direction. 3 and 4, the downstream blade 18 has a top blade 18a and a side blade 18b, the top blade 18a of the downstream blade 18 is inclined, and this inclination angle is It is the same as the inclination angle of the surface 63a. Also, the width of the downstream blade 18 corresponds to the cylindrical diameter of the valve seat downstream chamber 63 . In the present embodiment, the downstream blade 18 is arranged in close proximity to the inner wall of the valve seat downstream chamber 63 as the flow path, but it may be arranged in contact therewith.

As shown in FIG. 1, an adjusting rod 35 is arranged at the rear end of the valve shaft 10. As shown in FIG. The adjustment rod 35 is screwed to the casing lid 32 via an O-ring 36, and can be screwed by inserting a tool such as a screwdriver into an operation groove 35c formed in the upper portion. . The adjustment position of the adjustment rod 35 with respect to the casing lid 32 is fixed by a lock nut 89. As shown in FIG.

An adjustment space 35b is formed in the adjustment rod 35 along the axial direction, and the rear end of the valve shaft 10 is inserted into the adjustment space 35b. The valve shaft 10 is held movably in the axial direction (directions of arrows 105 and 106) within the adjustment space 35b. The upper portion of the adjusting rod 35 protruding from the casing lid 32 is covered with a protective cap 37. As shown in FIG.

A disk surface 35a is formed on the tip side of the adjusting rod 35. As shown in FIG. A pressing piece 39 extending in the distal direction is integrally fixed near the outer circumference of the disk surface 35a. In this embodiment, eight pressing pieces 39 are fixed to the disk surface 35a at equal intervals in the circumferential direction.

The adjusting rod 35, the valve shaft 10 and the valve seat 60 are arranged on the same axis (center line L1), and the valve body 12 of the valve shaft 10 is positioned facing the valve port 62. As shown in FIG. A spring bearing 13 is fixed near the center of the valve shaft 10 . The valve shaft 10 passes through the center hole of the container-shaped intermediate member 75 , and the intermediate member 75 is in contact with the lower side of the spring bearing 13 . The intermediate member 75 has a curved outer side, and a return spring 71 is attached between the intermediate member 75 and the bottom portion of the valve chamber 53 on the inner side of this curvature. That is, the valve shaft 10 is always biased in the direction of arrow 105 by the return spring 71 via the intermediate member 75 and the spring bearing 13 .

A bimetal laminate 40 is attached to the valve stem 10 . The upper surface of the bimetal laminate 40 contacts the lower end surface 39a of the pressing piece 39, and forms a rotation space 2s with the disk surface 35a of the adjusting rod 35. As shown in FIG. Eight rotary blades 2 fixed to the valve shaft 10 are rotatably positioned in the rotary space 2s.

The lower surface of the bimetal laminate 40 is in contact with the intermediate member 75 with the flat washer 73 interposed therebetween. This bimetal laminate 40 is configured by laminating a plurality of bimetals, which are temperature-sensitive members that deform in response to ambient temperature. It expands and contracts along the axial direction when the ambient temperature drops. FIG. 1 shows a state in which the bimetal laminate 40 is expanded.

A valve body biasing spring 72 attached to the valve shaft 10 is arranged inside the intermediate member 75 . The upper portion of the valve body biasing spring 72 abuts on the flat washer 73 and the lower portion abuts on the upper side of the spring bearing 13 via a washer 85 .

(Description of operation of temperature control trap 1)
Next, the operation of this temperature control trap 1 will be described. At the initial stage, the valve chamber 53 is filled with air, and the bimetal laminate 40 contracts according to the low-temperature atmosphere. The spring bearing 13 of the valve shaft 10 is biased by the return spring 71, and the valve shaft 10 is moved in the direction of the arrow 105 as shown in FIG. At this time, the valve body 12 is also withdrawn from the valve port 62 in the direction of the arrow 105, and the valve port 62 is opened (FIG. 4).

When the piping system starts to transfer steam, condensate flows from the inlet 51 through the trace heat transfer tubes. The drain at the initial stage is at a low temperature, and this drain pushes air out of the valve port 62 and exhausts it in the direction of the arrow 102 to the outflow port 56 . Subsequently, the low-temperature drain is discharged from the outflow port 56 along the same path.

After that, the high-temperature drain heated by the steam flows into the valve chamber 53 through the inflow passage 52 from the inflow passage rear end 52b. The drain that has flowed in from the rear end 52b of the inflow passage passes through the screen 70, passes between the eight pressing pieces 39, and enters the rotation space 2s. Then, the drain passes through the gap between the side wall of the valve chamber 53 and the bimetal laminate 40 toward the valve port 62 .

As the temperature of the drain in the valve chamber 53 rises, the bimetal laminate 40 gradually expands. The expanding bimetal laminate 40 presses the spring receiver 13 fixed to the valve stem 10 via the plain washer 73, the valve body biasing spring 72 and the washer 85 in the direction of the arrow 106. As shown in FIG. At this time, since the relatively strong valve body biasing spring 72 does not contract, the expansion of the bimetal laminate 40 is directly transmitted to the valve shaft 10, and the valve body 12 enters the valve opening 62 to close the valve opening 62. (Fig. 3). At this time, the return spring 71 is pressed and compressed by the expansion of the bimetal laminate 40 .

By closing the valve port 62, the drainage of the drain is stopped, and the drain at the set reference temperature stays in the valve chamber 53 and the trace heat transfer pipe. As a result, the trace heat transfer pipe heats a heating target such as a heavy oil transport pipe. After that, due to heat exchange with the object to be heated, the temperature of the drain in the trace heat transfer tube gradually decreases, and the temperature of the drain in the valve chamber 53 also drops below the reference temperature.

The bimetal laminate 40 reacts to this drop in temperature of the drain and starts shrinking. Due to the contraction of the bimetal laminate 40, the return spring 71 expands and returns, pushes up the spring bearing 13 fixed to the valve shaft 10 via the intermediate member 75, and the valve shaft 10 moves in the direction of the arrow 105 to move the valve. Body 12 opens valve port 62 . As a result, the drain whose temperature is lower than the reference temperature is discharged to the outflow port 56 through the valve port 62 . After that, the high-temperature drain flows into the valve chamber 53, the expansion of the bimetal laminate 40 closes the valve port 62 again, and the drain at the reference temperature stays.

As described above, the bimetal laminate 40 expands and contracts in response to the temperature of the drain in the valve chamber 53, causing the valve body 12 of the valve shaft 10 to move up and down, and the valve opening 62 to open and close. is repeated to keep the drain in the valve chamber 53 and the trace heat transfer tube at the set reference temperature.

It should be noted that the bimetal laminate 40 may continue to expand even after the valve body 12 has completely closed the valve opening 62 due to the expansion of the bimetal laminate 40 . In this case, in order to avoid an excessive load on the bimetal laminate 40, the valve body biasing spring 72 contracts together with the return spring 71 to absorb the expansion of the bimetal laminate 40. FIG.

The reference temperature of the drain in the valve chamber 53 and the trace heat transfer tube can be freely adjusted and set. When adjusting the reference temperature, remove the protective cap 37 on the top of the temperature control trap, loosen the lock nut 89, insert a tool such as a screwdriver into the operating groove 35c, and screw the adjustment rod 35. Move axially.

When the adjusting rod 35 is tightened toward the inside of the valve chamber 53, the lower end surfaces 39a of the eight pressing pieces 39 fixed to the adjusting rod 35 press the bimetal laminate 40, thereby adjusting the position of the valve shaft 10 itself. moves downward in the direction of arrow 106, the reference temperature can be set low. Conversely, when the adjusting rod 35 is loosened, the bias of the return spring 71 causes the position of the valve stem 10 itself to move upward in the direction of the arrow 105, so that the reference temperature can be set higher.

(Description of cleaning operation)
As the temperature control trap 1 operates, foreign substances such as rust and scale adhere and accumulate on the valve opening 62 in the valve chamber 53 and its vicinity. In this embodiment, the valve shaft 10 is provided with the upstream blade 17 and the downstream blade 18, and is provided with the rotary vane 2. As shown in FIG. The valve shaft 10 is rotated by receiving the fluid pressure of the inflowing drain or the like to the rotary blade 2, and the upstream blade 17 and the downstream blade 18 scrape off and remove the foreign matter adhering to the valve opening 62 and its vicinity.

That is, as described above, the drain flows into the valve chamber 53 from the inflow passage rear end 52b through the inflow passage 52. The diameter is smaller than the trailing end 52a. Therefore, the drain that has passed through the inflow passage 52 is jetted from the inflow passage tip 52b toward the valve chamber 53 with high fluid pressure, and this drain collides with the rotary blades 2 fixed to the valve shaft 10, and the eight blades are ejected one by one. Rotate the rotating blade 2 in the direction of rotation.

As a result, the valve shaft 10 rotates about the center line L1, and accordingly the upstream blade 17 and the downstream blade 18 also rotate to scrape off foreign matter adhering to the inner surfaces of the valve seat upstream chamber 61 and the valve seat downstream chamber 63. Remove. FIG. 3 shows the valve shaft 10 lowered in the direction of arrow 106 to the limit position.

While the valve shaft 10 descends toward the limit position, the upstream blade 17 scrapes off foreign matter from the side wall of the valve seat upstream chamber 61, and the edge of the upstream blade 17 contacts the bottom surface of the valve seat upstream chamber 61. As a result, foreign matter on the bottom surface is also scraped off. In addition, the side blade 18b of the downstream blade 18 scrapes off foreign matter adhering to the side wall 63b of the valve seat downstream chamber 63. As shown in FIG. When the valve stem 10 descends to the limit position and the valve port 62 is completely closed, the inflow of drain into the valve chamber 53 is temporarily stopped, so that the upstream blade 17 and the downstream blade 18 also rotate. interrupt.

Here, as described above, the bimetal laminate 40 expands or contracts in response to the temperature inside the valve chamber 53, and the valve stem 10 repeats up and down movement in order to open and close the valve port 62. FIG. Therefore, when the valve stem 10 rises in the direction of the arrow 105 due to the contraction of the bimetal laminate 40 from the state shown in FIG. 17 and the downstream blade 18 also rise while rotating.

In the process in which the valve stem 10 rises toward the limit position, the upstream blade 17 scrapes off foreign matter on the side wall of the valve seat upstream chamber 61, and the side blade 18b of the downstream blade 18 removes foreign matter adhering to the side wall 63b of the valve seat downstream chamber 63. Scrape off. Then, when the valve shaft 10 rises to the limit position in the direction of the arrow 105 as shown in FIG. The scraped foreign matter is discharged from the outflow port 56 together with the drain and the like through the valve port 62 .

As described above, while the drain is flowing into the valve chamber 53, the valve shaft 10 constantly rotates, and the upstream blade 17 and the downstream blade 18 scrape off the foreign matter adhering to the valve opening 62 and its vicinity. to remove. In addition, as the valve stem 10 moves up and down, the upstream blade 17 and the downstream blade 18 scrape off foreign matter while moving in the direction of the central axis L1. can be done. In order to ensure smooth rotation of the valve shaft 10, a lubricating means such as a bearing may be provided at the spring bearing 13 or the like.

[Second embodiment]
Next, a second embodiment of a temperature responsive valve having cleaning means according to the present application will be described. FIG. 5 shows the temperature control trap 11 in this embodiment. The same reference numerals are assigned to the same configurations as those of the temperature control trap 1 in the first embodiment described above, and the description of the configuration and operation is omitted.

In the temperature control trap 11 according to this embodiment, the guide member 6 is attached to the upper surface of the bimetal laminate 40. As shown in FIG. A through hole is formed in the central portion of the guide member 6, and the valve stem 10 is arranged in a state of passing through this through hole. The guide member 6 has a mortar shape with an upper surface inclined toward the through hole.

Further, in the temperature control trap 11, eight rotating blades 4 are radially fixed at equal intervals from the central portion of the valve shaft 10 to the rear end. A lower end of the rotary vane 4 constitutes an oblique side corresponding to the inclination of the upper surface of the guide member 6 and is close to the guide member 6 . The guide member 6 is in contact with the lower end surfaces 9a of the eight pressing pieces 9 fixed to the disk surface 35a of the adjusting rod 35. As shown in FIG.

In the present embodiment, since the guide member 6 is provided, the high-pressure drain ejected from the inflow path tip 52b of the inflow path 52 is guided to the rotary vane 4 along the inclined surface of the guide member 6. As shown in FIG. As a result, the drain reliably collides with the rotary vane 4, the rotary vane 4 is rotated within the rotation space 4s, and the upstream blade 17 and the downstream blade 18 scrape off and remove the foreign matter.

In addition, since the lower end of the rotary vane 4 constitutes an oblique side corresponding to the inclination of the upper surface of the guide member 6, the area of the rotary vane 4 can be secured as large as possible, and the fluid pressure of the drain can be ensured more reliably. can receive

In this embodiment, the guide member 6 having the shape of a mortar was exemplified.

[Other embodiments]
In each of the above-described embodiments, eight rotary blades 2 and 4 are illustrated, but seven or less or nine or more rotary blades may be employed. Further, the shape and structure of the rotary blades 2 and 4 are not limited to those exemplified in each embodiment, and other shapes and structures may be adopted as long as they are configured to rotate the shaft portion by receiving the flow of fluid. .

Further, in each of the above-described embodiments, the upstream blade 17 and the downstream blade 18 are illustrated as the scraping portion, but only one of the upstream blade 17 and the downstream blade 18 may be provided. Furthermore, the shape and structure of the upstream blade 17 and the downstream blade 18 are not limited to those exemplified in each embodiment. Other configurations may be employed as long as they can scrape off the foreign matter.

In each of the above-described embodiments, the inflow passage 52 whose diameter gradually decreases toward the valve chamber 53 is exemplified as the ejection passage, and the tip 52b of the inflow passage is shown as the ejection port. Any other configuration may be adopted as long as it is formed to be smaller than the diameter of the nozzle and increases the fluid pressure of the fluid ejected from the ejection port.

Furthermore, the ejection channel is curved along a plane direction orthogonal to the axis (the center line L1 in the embodiment) of the valve stem (shaft portion), and the fluid is ejected from the ejection port toward the rotation direction of the fluid receiving portion. may be adopted. As a result, it is possible to apply a unidirectional rotational force to the fluid receiving portion, and to more reliably rotate the shaft portion.

1, 11: temperature control trap 2, 4 rotating blades 6: guide member 10: valve stem 17: upstream blade
18: Downstream blade 31: Casing Casing lid 32 52: Inflow path
52b: Rear end of inflow passage 53: Valve chamber 54: Bottom chamber 55: Outflow passage 61: Upstream chamber of valve seat
62: Valve port 63: Valve seat downstream chamber L1: Center line

Claims (4)

A main body that is connected to a piping system that transfers fluid and that has a flow path in which fluid flows from upstream to downstream. a body having a
A shaft portion located inside the body and rotatable about a central axis, the shaft portion having an abrading portion disposed in contact with or in close proximity to the flow path in which the valve opening is located; and a fluid receiving portion provided on the shaft portion for receiving the flow of the fluid to rotate the shaft portion;
A temperature responsive valve with cleaning means comprising: In a temperature responsive valve having cleaning means according to claim 1,
the flow path has a jetting flow path for jetting the fluid from the jetting port to the fluid receiving part;
The ejection port is formed so as to gradually narrow in the ejection channel,
A temperature responsive valve having cleaning means characterized by: In a temperature responsive valve having cleaning means according to claim 1 or claim 2,
a guide portion that guides the fluid flowing through the flow path toward the fluid receiving portion;
A temperature responsive valve with cleaning means comprising: In a temperature responsive valve having cleaning means according to claim 3,
The scraping portion has an upstream scraping portion located upstream of the valve opening, and a downstream scraping portion located downstream of the valve opening.
A temperature responsive valve having cleaning means characterized by:

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