Frequency type automatic drain valve

Abstract

A valve core piece comprises a valve core piece and a connecting rod connected to the valve core piece, the valve core piece is arranged on the upper surface of a valve seat, the connecting rod penetrates out of a valve cover, a drainage channel communicated with the periphery of the bottom from the center of the bottom is formed in the valve core piece, the drainage channel is communicated with a first hole in the center position, and the first hole is communicated with a second hole in the center position. The drainage channel corresponds to the second hole in the circumferential direction at the peripheral position; the rotary drive is connected to the free end of the connecting rod; according to the frequency type automatic drain valve, the conduction state of the frequency type automatic drain valve can be adjusted through rotation of the valve element part, the working time of rotation driving can be accurately controlled in a timing mode, and compared with control achieved through a thermal power mode, an active control mode has the advantage of being stable in execution; under any condition, the on-off time per minute can be not more than 3 times, and the on-off time and the off time are strictly distributed and controlled according to the amount of condensed water generated by the system.

Description

Technical Field

[0001] The invention relates to the field of steam traps, in particular to a frequency type automatic steam trap. Background Art

[0002] The treatment of condensate is often involved in steam pipelines. Recycling condensate can not only make the steam system work normally, but also recover some heat. The three types of condensate are commonly used to treat thermostatic steam traps, mechanical steam traps and thermodynamic steam traps.

[0003] Thermodynamic steam traps work based on thermodynamic properties, achieving the drainage effect based on the different movement speeds of steam and condensate, the condensation of steam, and the density difference / viscosity difference between steam and condensate. The implementation standard of thermodynamic steam traps stipulates that the number of openings and closings per minute is not more than 3 times to be qualified, but in fact, due to the influence of factors such as processing accuracy, material selection, ambient temperature, and condensate volume, it is difficult to meet the standard requirements. In addition, a large amount of steam will leak from thermodynamic steam traps during the drainage process, reducing the operating efficiency of the entire steam system. Summary of the invention

[0004] The main purpose of the present invention is to provide a frequency-type automatic steam trap, which aims to solve the problem that the thermal power steam trap is frequently opened and closed, and a large amount of steam leaks during the drainage process, thereby reducing the operating efficiency of the entire steam system.

[0005] In order to achieve the above object, the present invention provides a frequency type automatic steam trap, comprising:

[0006] The valve body has an inlet channel and an outlet channel at both ends in the length direction, a cover mounting seat is provided on the outer wall in the middle of the length direction of the valve body, an annular groove is provided at the bottom of the cover mounting seat, a first connecting channel is provided in the middle of the length direction of the valve body, the first connecting channel connects the inlet channel and the cover mounting seat, and a second connecting channel is connected between the annular groove and the outlet channel;

[0007] a valve cover connected to the cover mounting seat;

[0008] A valve seat, which is detachably mounted in the cover mounting seat, wherein the valve seat is provided with a first hole and a second hole penetrating in a thickness direction, wherein the first hole is in communication with the first connecting channel, and the second hole is in communication with the annular groove;

[0009] A valve core member, comprising a valve core and a connecting rod connected to the valve core, wherein the valve core is arranged on the upper surface of the valve seat, the connecting rod passes through the valve cover, and the valve core is provided with a drainage channel extending from the bottom center to the bottom periphery, the drainage channel is connected to the first hole at the center position, and the drainage channel corresponds to the second hole in the circumferential direction at the peripheral position;

[0010] A rotary drive is connected to the free end of the connecting rod to drive the valve core member to rotate, wherein the driving angle of the rotary drive is adjustable.

[0011] Furthermore, the connecting rod includes a first rod and a second rod, the first rod is connected to the valve chip, and the second rod forms a circumferentially fixed detachable connection with the first rod, wherein a circumferentially acting elastic member is arranged corresponding to the first rod and / or the valve chip, and the drainage channel and the second hooking channel are staggered in a free state.

[0012] Furthermore, the number of the second holes is multiple and they are evenly distributed in the axial direction of the valve seat.

[0013] Furthermore, a plurality of clamping heads are arranged on the end surface of the first rod corresponding to the second rod, and a clamping groove is arranged on the second rod corresponding to the clamping heads on the first rod.

[0014] Furthermore, the rotation drive drives the second rod to have an adjustable position in the length direction of the first rod.

[0015] Furthermore, a filter mounting seat is also provided on the outer wall in the middle of the length direction of the valve body, a filter chamber is inside the filter mounting seat, the first connecting channel is connected to the inlet channel through the filter chamber, and the frequency-type automatic drain valve also includes a filter installed in the filter chamber.

[0016] Furthermore, the filter mounting seat is provided with a liquid level sensor extending into the filter cavity, and the frequency-type automatic drain valve also includes a controller, which receives data from the liquid level sensor and controls the operation of the rotary drive.

[0017] Furthermore, a flow sensor is provided in the inlet channel and / or the outlet channel, and the flow sensor is electrically connected to the controller.

[0018] Furthermore, a packing seal is provided at a position where the connecting rod contacts the valve cover.

[0019] Furthermore, the valve core member is made of polymer.

[0020] The frequency-type automatic steam trap provided by the present invention can adjust the conduction state of the frequency-type automatic steam trap by the rotation of the valve core, and the working timing of the rotary drive can be precisely controlled by timing. Compared with the control by thermal power, the active control method has the advantage of stable execution. Sensors are set at specific positions of the corresponding valve body to identify the position of condensed water, thereby providing guidance for the operation of the rotary drive; regardless of any conditions, the switch is achieved no more than 3 times per minute, and the opening time and closing time are strictly allocated and controlled according to the amount of condensed water generated by the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 1 is a schematic diagram of a frequency-type automatic steam trap according to a first embodiment of the present invention;

[0022] Figure 2 It is a schematic diagram of the installation of the valve seat in the frequency type automatic steam trap of the first embodiment of the present invention;

[0023] Figure 3 1 is a schematic diagram of a valve body in a frequency-type automatic steam trap according to a first embodiment of the present invention;

[0024] Figure 4 1 is a cross-sectional schematic diagram of a frequency-type automatic steam trap according to a first embodiment of the present invention;

[0025] Figure 5 1 is a schematic diagram of a frequency-type automatic steam trap according to a second embodiment of the present invention (the first rod is combined with the second rod);

[0026] Figure 6 It is a schematic diagram of a frequency-type automatic steam trap according to a second embodiment of the present invention (the first rod and the second rod are combined and separated).

[0027] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0028] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0029] Those skilled in the art will appreciate that, unless expressly stated otherwise, the singular forms "a", "an", "said", "above", and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present invention refers to the presence of the features, integers, steps, operations, elements, units, modules, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, units, modules, components, and / or groups thereof. It should be understood that when we refer to an element as being "connected" or "coupled" to another element, it may be directly connected or coupled to the other element, or there may be intermediate elements. In addition, the "connection" or "coupling" used herein may include wireless connection or wireless coupling. The term "and / or" used herein includes all or any unit and all combinations of one or more associated listed items.

[0030] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as generally understood by those skilled in the art in the art to which the present invention belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have meanings consistent with the meanings in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless specifically defined as herein.

[0031] Reference Figures 1 to 6 In one embodiment of the present invention, a frequency-type automatic steam trap includes:

[0032] The valve body 100 has an inlet channel 110 and an outlet channel 120 at both ends in the length direction. A cover mounting seat 130 is provided on the outer wall of the middle part of the length direction of the valve body 100. An annular groove 131 is provided at the bottom of the cover mounting seat 130. A first connecting channel 140 is provided in the middle part of the length direction of the valve body 100. The first connecting channel 140 connects the inlet channel 110 and the cover mounting seat 130. A second connecting channel 150 is connected between the annular groove 131 and the outlet channel 120.

[0033] A valve cover 200 connected to the cover mounting seat 130;

[0034] The valve seat 300 is detachably mounted in the cover mounting seat 130 , and the valve seat 300 is provided with a first hole 310 and a second hole 320 penetrating in the thickness direction, the first hole 310 is in communication with the first connecting channel 140 , and the second hole 320 is in communication with the annular groove 131 ;

[0035] The valve core member 400 includes a valve core 410 and a connecting rod 420 connected to the valve core 410. The valve core 410 is disposed on the upper surface of the valve seat 300. The connecting rod 420 passes through the valve cover 200. The valve core 410 is provided with a drainage channel 411 extending from the bottom center to the bottom periphery. The drainage channel 411 is connected to the first hole 310 at the center position. The drainage channel 411 corresponds to the second hole 320 in the circumferential direction at the peripheral position.

[0036] The rotary driver 500 is connected to the free end of the connecting rod 420 to drive the valve core member 400 to rotate, wherein the driving angle of the rotary driver 500 is adjustable.

[0037] In the prior art, it is difficult for thermodynamic steam traps to meet standard requirements due to the influence of factors such as processing accuracy, material selection, ambient temperature, and condensate volume. In addition, a large amount of steam will leak from thermodynamic steam traps during drainage, reducing the operating efficiency of the entire steam system.

[0038] The frequency type automatic drain valve provided by the present invention has a valve body 100 as the main structural member, which is the installation base of related parts. The two ends of the valve body 100 in the length direction are the inlet channel 110 and the outlet channel 120 respectively. The outer wall in the middle of the length direction of the valve body 100 is provided with a cover mounting seat 130, and the cover mounting seat 130 is the position for discharging condensed water. The bottom of the cover mounting seat 130 is provided with an annular groove 131. The middle of the length direction of the valve body 100 is provided with a first connecting channel 140. The first connecting channel 140 conducts the inlet channel 110 and the cover mounting seat 130, and the fluid entering from the inlet channel 110 of the valve body 100 is conducted from the first connecting channel 140 to the cover mounting seat 130. A second connecting channel 150 is connected between the annular groove 131 and the outlet channel 120.

[0039] The valve cover 200 is connected to the cover mounting seat 130, thereby closing the cover mounting seat 130 to form a working space. The connection between the valve cover 200 and the cover mounting seat 130 is preferably, but not limited to, a threaded connection.

[0040] The valve seat 300 can be detachably mounted in the cover mounting seat 130. The fixing of the valve seat 300 can be achieved by pressing down the valve cover 200, but other forms can also be used in the corresponding embodiments. The function of the valve seat 300 is to guide the flow of steam and condensed water. The valve seat 300 is provided with a first hole 310 and a second hole 320 that penetrate the thickness direction. The first hole 310 is connected to the first connecting channel 140, and the second hole 320 is connected to the annular groove 131.

[0041] The valve core component 400 includes a valve core 410 and a connecting rod 420 connected to the valve core 410. The valve core 410 is arranged on the upper surface of the valve seat 300, and the connecting rod 420 passes through the valve cover 200. A drainage channel 411 is arranged on the valve core 410, which is connected from the bottom center to the bottom periphery. The drainage channel 411 is connected to the first hole 310 at the center position, and the drainage channel 411 corresponds to the second hole 320 in the circumferential direction at the peripheral position. When the drainage channel 411 is rotated to align with the second hole 320, the inlet channel 110 and the outlet channel 120 are connected. The specific flow direction is the inlet channel 110, the first connecting channel 140, the first hole 310, the drainage channel 411, the second connecting channel 150 and the outlet channel 120. The connecting rod 420 and the valve cover 200

[0042] The rotary drive 500 is connected to the free end of the connecting rod 420, and drives the valve core member 400 to rotate. Whether the inlet channel 110 and the outlet channel 120 are connected is achieved through the operation of the rotary drive 500. The rotary drive 500 actively controls whether the frequency-type automatic steam trap is connected. Compared with the control achieved by thermal power, the active control method has the advantage of stable execution. Sensors can be set at specific positions corresponding to the valve body 100 to identify the position of condensed water, thereby providing guidance for the operation of the rotary drive 500. The operating frequency of the rotary drive 500 can also be set according to the amount of condensed water generated. The rotary drive angle of the rotary drive 500 needs to be accurate so that precise control can be achieved, such as a servo control type.

[0043] In summary, the rotation of the valve core 400 can adjust the conduction state of the frequency-type automatic steam trap, and the working timing of the rotary drive 500 can be precisely controlled by timing. Compared with the control by thermal power, the active control method has the advantage of stable execution. Sensors are set at specific positions corresponding to the valve body 100 to identify the position of condensed water, thereby providing guidance for the operation of the rotary drive 500; regardless of any conditions, the switch is not more than 3 times per minute, and the opening time and closing time are strictly allocated and controlled according to the amount of condensed water generated by the system.

[0044] Reference Figures 5 to 6 In one embodiment, the connecting rod 420 includes a first rod 421 and a second rod 422, wherein the first rod 421 is connected to the valve chip 410, and the second rod 422 forms a circumferentially fixed detachable connection with the first rod 421, wherein a circumferentially acting elastic member 430 is arranged corresponding to the first rod 421 and / or the valve chip 410, and the drainage channel 411 and the second hooking channel 150 are staggered in a free state.

[0045] In this embodiment, by setting the connecting rod 420 to be interruptible, the working mode of the valve core member 400 can be switched. When the connecting rod 420 is in a connected state, the active control in the aforementioned embodiment can be realized; when the connecting rod 420 is separated to form a disconnected first rod 421 and a second rod 422, under the action of the elastic member 430, the drainage channel 411 is misaligned with the second hooking channel 150. At this time, the first rod 421 and the valve chip 410 form a whole that can float. At this time, the structure of the frequency-type automatic steam trap is consistent with the working mode of the existing thermodynamic steam trap. The setting position of the elastic member 430 can be inside the valve body 100 or outside the valve body 100; the structural type of the elastic member 430 can also be various, such as a torsion spring type. The way to form a connection between the second rod 422 and the first rod 421 can be various, such as a snap-on magnetic connection or a buckle connection, etc., and the specific method is to form a circumferential fixation. Due to the existence of the elastic member 430, when the first rod 421 and the second rod 422 are combined, the angle is fixed, and the rotation drive 500 is accurate for the rotation drive of the connecting rod 420. When the relevant structure is damaged or the working conditions of the entire system change, the active control method can be selected to be adjusted to the thermal power method.

[0046] Reference Figures 1 to 4 In one embodiment, the number of the second holes 320 is multiple and they are evenly distributed in the axial direction of the valve seat 300 .

[0047] In this embodiment, by increasing the number of the second holes 320 , the valve core member 400 is subjected to a more uniform force in the thermodynamic working mode, thereby improving the smoothness of operation, reducing the degree of wear, and enhancing the sealing effect.

[0048] In one embodiment, a plurality of clamping heads are disposed on the end surface of the first rod 421 corresponding to the end surface of the second rod 422 , and a clamping groove is disposed on the second rod 422 corresponding to the clamping head on the first rod 421 .

[0049] In this embodiment, the first rod 421 and the second rod 422 are connected and separated by the connection and separation of the clamping head and the clamping groove, and since there are multiple rods, the two are fixed in the circumferential direction.

[0050] Reference Figures 5 to 6 In one embodiment, the rotation drive 500 drives the second rod 422 to be adjustable in the length direction of the first rod 421 .

[0051] In the above-mentioned embodiment, the method of separating the second rod 422 from the first rod 421 is not limited, and can be done manually. In this embodiment, the rotary drive 500 drives the second rod 422 to be adjustable in the length direction of the first rod 421, so that the connection between the second rod 422 and the first rod 421 can be disconnected by automatic control. The specific driving method can be various, such as the rotary drive 500 moves as a whole, or the rotary drive 500 drives the second rod 422 to extend and retract to achieve the connection and separation between the second rod 422 and the first rod 421.

[0052] Reference Figures 1 to 4 In one embodiment, a filter mounting seat 160 is further provided on the outer wall of the middle portion of the length direction of the valve body 100, and a filter cavity is provided in the filter mounting seat 160. The first connecting channel 140 is connected to the inlet channel 110 through the filter cavity, and the frequency-type automatic drain valve also includes a filter 161 installed in the filter cavity.

[0053] In this embodiment, the filter mounting seat 160 can filter impurities in the steam through the installation of the filter 161, thereby reducing the possibility of abnormality of the entire frequency-type automatic steam trap and reducing the working abnormality of related pipelines.

[0054] In one embodiment, a liquid level sensor extending into the filter cavity is disposed on the filter mounting seat 160 , and the frequency-type automatic steam trap further includes a controller, which receives data from the liquid level sensor and controls the operation of the rotary drive 500 .

[0055] In this embodiment, the controller continuously receives data from the liquid level sensor, thereby obtaining the liquid level in the filter mounting seat 160, and adjusting the operation of the rotary drive 500 according to the liquid level information, thereby achieving an intelligent control effect. The type of the controller may be PLC or microcomputer control, and the type of the liquid level sensor may be a pressure sensor, whichever is more suitable for obtaining the liquid level data.

[0056] In one embodiment, a flow sensor is disposed in the inlet channel 110 and / or the outlet channel 120 , and the flow sensor is electrically connected to the controller.

[0057] In this embodiment, the flow sensor can monitor the operation of the frequency-type automatic steam trap, thereby providing a basis for the operation of the controller. The structure type of the flow sensor can be mechanical or ultrasonic.

[0058] In one embodiment, a packing seal is provided at the position where the connecting rod 420 contacts the valve cover 200 .

[0059] In this embodiment, the sealing method of the packing seal can refer to various existing methods, which are not limited in detail, as long as a sealing effect can be formed and the rotation of the connecting rod 420 is not restricted.

[0060] In one embodiment, the valve core member 400 is made of polymer.

[0061] In this embodiment, the valve core member 400 is made of polymer, which has excellent circumferential sealing effect and low driving force required for floating.

[0062] In summary, the frequency-type automatic steam trap provided by the present invention can adjust the conduction state of the frequency-type automatic steam trap by the rotation of the valve core 400, and the working timing of the rotary drive 500 can be precisely controlled by timing. Compared with the control by thermal power, the active control method has the advantage of stable execution. A sensor is set at a specific position of the corresponding valve body 100 to identify the position of condensed water, thereby providing guidance for the operation of the rotary drive 500; regardless of any conditions, the switch is not more than 3 times per minute, and the opening time and closing time are strictly allocated and controlled according to the amount of condensed water generated by the system.

[0063] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A frequency type automatic steam trap, characterized in that: include: A valve body (100), wherein the two ends in the length direction are an inlet channel (110) and an outlet channel (120) respectively; a cover mounting seat (130) is provided on the outer wall of the middle part of the length direction of the valve body (100); an annular groove (131) is provided at the bottom of the cover mounting seat (130); a first connecting channel (140) is provided in the middle part of the length direction of the valve body (100); the first connecting channel (140) connects the inlet channel (110) and the cover mounting seat (130); a second connecting channel (150) is connected between the annular groove (131) and the outlet channel (120); A valve cover (200) connected to the cover mounting seat (130); A valve seat (300) is detachably mounted in the cover mounting seat (130), and the valve seat (300) is provided with a first hole (310) and a second hole (320) penetrating in the thickness direction, the first hole (310) is in communication with the first connecting channel (140), and the second hole (320) is in communication with the annular groove (131); A valve core member (400), comprising a valve core (410) and a connecting rod (420) connected to the valve core (410), wherein the valve core (410) is arranged on the upper surface of the valve seat (300), and the connecting rod (420) passes through the valve cover (200), and the valve core (410) is provided with a drainage channel (411) which is connected from the bottom center to the bottom periphery, and the drainage channel (411) is connected to the first hole (310) at the center position, and the drainage channel (411) corresponds to the second hole (320) in the circumferential direction at the peripheral position; The rotary drive (500) is connected to the free end of the connecting rod (420) to drive the valve core member (400) to rotate, wherein the driving angle of the rotary drive (500) is adjustable.

2. The frequency type automatic steam trap according to claim 1, characterized in that: The connecting rod (420) includes a first rod (421) and a second rod (422), wherein the first rod (421) is connected to the valve chip (410), and the second rod (422) forms a circumferentially fixed detachable connection with the first rod (421), wherein a circumferentially acting elastic member (430) is arranged corresponding to the first rod (421) and / or the valve chip (410), and the drainage channel (411) and the second hooking channel (150) are staggered in a free state.

3. The frequency type automatic steam trap according to claim 2, characterized in that: The number of the second holes (320) is plural and they are evenly distributed in the axial direction of the valve seat (300).

4. The frequency type automatic steam trap according to claim 3, characterized in that: A plurality of clamping heads are arranged on the end surface of the first rod (421) corresponding to the second rod (422), and a clamping groove is arranged on the second rod (422) corresponding to the clamping head on the first rod (421).

5. The frequency type automatic steam trap according to claim 3, characterized in that: The rotation drive (500) drives the second rod (422) to adjust the position in the length direction of the first rod (421).

6. The frequency type automatic steam trap according to claim 1, characterized in that: A filter mounting seat (160) is also provided on the outer wall of the middle part of the length direction of the valve body (100), and a filter cavity is provided in the filter mounting seat (160). The first connecting channel (140) is connected to the inlet channel (110) through the filter cavity, and the frequency-type automatic drain valve also includes a filter (161) installed in the filter cavity.

7. The frequency type automatic steam trap according to claim 6, characterized in that: The filter mounting seat (160) is provided with a liquid level sensor extending into the filter cavity. The frequency-type automatic drain valve also includes a controller, which receives data from the liquid level sensor and controls the operation of the rotary drive (500).

8. The frequency type automatic steam trap according to claim 7, characterized in that: A flow sensor is disposed in the inlet channel (110) and / or the outlet channel (120), and the flow sensor is electrically connected to the controller.

9. The frequency type automatic steam trap according to any one of claims 1 to 8, characterized in that: A packing seal is provided at a position where the connecting rod (420) contacts the valve cover (200).

10. The frequency type automatic steam trap according to any one of claims 1 to 8, characterized in that: The valve core component (400) is made of polymer.

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