A cock-type four-way reversing valve

Abstract

The utility model belongs to the technical field of reversing valve, disclose a kind of plug four-way reversing valve, including valve body and electric actuator, electric actuator is fixedly installed in the top center of valve body, and the left and right sides of upper portion on the front of valve body are respectively provided with second water outlet pipe and first water inlet pipe, and the left and right sides of upper portion on the back of valve body are respectively provided with second water inlet pipe and first water outlet pipe, and the inner wall of valve body is evenly distributed and is set with two long partition and two short partition along vertical direction, the utility model is sealed by the conical sealing cooperation of plug valve core and valve body, and is closely adhered in combination long partition, short partition and water baffle, significantly improve sealing reliability, effectively solve the problem of internal leakage.Electric actuator accurately drives valve core rotation 45 degrees to realize reversing, cooperate with the water passing hole design of water passing groove and water passing plate, ensure that water flow is stable and no impact, guarantee pipe brush smooth movement.

Description

Technical Field

[0001] This utility model belongs to the field of directional valve technology, specifically relating to a plug-type four-way directional valve. Background Technology

[0002] In fully automatic online cleaning systems for condenser tube brushes, existing reversing devices mostly employ reversing tube structures or gate-face sealing designs. While reversing tube structures rely on arc-shaped surface sealing, and gate-face sealing is used in some patents (such as CN205639711U), both types of structures suffer from insufficient sealing reliability, easily leading to internal leakage due to incomplete sealing. This not only causes unstable water flow direction switching, affecting the reciprocating motion of the tube brush within the heat exchange tubes and making it difficult to thoroughly remove scale and dirt, but also increases the load on the chiller unit, reduces heat exchange efficiency and equipment lifespan, and fails to meet the stable operation requirements of continuous online cleaning. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a plug-type four-way directional valve to solve the problems existing in the prior art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A plug-type four-way directional valve includes a valve body and an electric actuator. The electric actuator is fixedly installed at the top center of the valve body. A second water outlet pipe and a first water inlet pipe are respectively provided on the left and right sides of the upper part of the front of the valve body. A second water inlet pipe and a first water outlet pipe are respectively provided on the left and right sides of the upper part of the back of the valve body. Two water-proof chambers and two water-passing chambers are provided in the upper part of the internal perimeter of the valve body, and two transition chambers are provided in the lower part. The water-passing chambers are connected to the corresponding transition chambers and are respectively connected to the first water inlet pipe and the second water outlet pipe. The two water-proof chambers are respectively connected to the first water outlet pipe and the second water inlet pipe. A plug valve core is inserted into the middle of the valve body. The plug valve core has a frustum-shaped structure with a larger upper part and a smaller lower part. The plug valve core is conically sealed to each of the water-proof chambers, each of the water-passing chambers and each of the transition chambers. Two sets of water passage structures are arranged side by side on the left and right sides of the plug valve.

[0006] When the two ends of the water passage structure are respectively aligned with the water-blocking cavity and the water passage cavity, the first water inlet pipe is connected to the first water outlet pipe, and the second water inlet pipe is connected to the second water outlet pipe;

[0007] When the two ends of the water-passing structure are respectively aligned with the two water-proof cavities, the first water inlet pipe is connected to the second water inlet pipe, and the first water outlet pipe is connected to the second water outlet pipe.

[0008] In a preferred embodiment of this utility model, two long partitions and two short partitions are evenly and alternately arranged along the vertical direction around the inner wall of the valve body. The length of the long partitions is equal to the height of the valve body, and the length of the short partitions is less than the height of the valve body. The top of the short partitions is flush with the long partitions. A water-passing plate and a water-blocking plate are respectively arranged horizontally between the bottom of the short partitions, the middle of the two adjacent long partitions, and the inner wall of the valve body. The positions of the two water-passing plates correspond to the positions of the first water inlet pipe and the second water inlet pipe, respectively. There is a gap between the water-passing plates and the outer surface of the plug valve core.

[0009] The water-blocking plate, the upper part of the corresponding long partition, the short partition, and the upper part of the inner wall of the valve body form the water-blocking cavity;

[0010] The water-passing plate, the upper part of the corresponding long partition, the short partition, and the upper part of the inner wall of the valve body form the water-passing cavity;

[0011] The bottom of the two long partitions divides the lower part of the valve body into two transition chambers.

[0012] In a preferred embodiment of this utility model, the water passage structure includes a water passage hole and a water passage groove that are vertically opened from top to bottom on the stopcock valve core;

[0013] When a single water passage connects the water-proof cavity and the water-passing cavity, the two transition cavities are not connected.

[0014] When both water passages are connected to the two water-proof cavities, the two water passage grooves are connected to the two transition cavities.

[0015] In a preferred embodiment of the present invention, the surface of the water-passing plate is provided with a plurality of water-passing holes evenly distributed along its length.

[0016] In a preferred embodiment of this utility model, valve core shafts are provided at the top and bottom center of the plug valve core along the vertical direction. The two valve core shafts are respectively connected to the upper flange cover and the lower flange cover bearings. The upper flange cover and the lower flange cover are respectively fastened to the top and bottom of the valve body by bolts. The electric actuator is fixedly installed on the top of the upper flange cover, and the valve core shaft above is fixedly installed to the rotating end of the electric actuator.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] This invention utilizes a conical seal between the stopcock valve core and the valve body (the stopcock valve core is a frustum-shaped cone, wider at the top and narrower at the bottom, fitting snugly with the internal structure of the valve body), combined with the tight fit of long partitions, short partitions, and a water-separating plate, to significantly improve sealing reliability and effectively solve the problem of internal leakage. An electric actuator precisely drives the valve core to rotate 45 degrees to achieve reversal. Combined with the design of the water passage groove and water-passing plate, it ensures stable water flow without impact, guaranteeing smooth movement of the tube brush. This valve has a simple structure and can perform online cleaning of the heat exchanger without shutting down the chiller unit. It thoroughly removes dirt to improve heat exchange efficiency, reduces unit load, and extends equipment life. It is a key component of a fully automatic tube brush cleaning system with broad application prospects. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the front sectional structure of this utility model;

[0020] Figure 2 A three-dimensional structural diagram of the valve body;

[0021] Figure 3 This is a schematic diagram of the forward flow direction half-section three-dimensional structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the forward flow top cross-section structure of this utility model;

[0023] Figure 5 This is a schematic diagram of the reverse flow semi-sectional three-dimensional structure of this utility model;

[0024] Figure 6 This is a schematic diagram of the reverse flow top cross-section structure of this utility model.

[0025] In the diagram: 1. Electric actuator; 2. Upper flange cover; 3. Valve body; 31. First inlet pipe; 32. First outlet pipe; 33. Second inlet pipe; 34. Second outlet pipe; 35. Water passage plate; 351. Water passage hole; 36. Long partition plate; 37. Water baffle plate; 38. Short partition plate; 4. Plug valve core; 41. Valve core shaft; 42. Water passage hole; 43. Water passage groove; 5. Lower flange cover. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0027] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0028] Please refer to Figure 1-6 As shown, an embodiment of this application provides a plug-type four-way reversing valve, including a valve body 3 and an electric actuator 1. The electric actuator 1 is fixedly installed at the top center of the valve body 3. The upper left and right sides of the front of the valve body 3 are respectively provided with a second water outlet pipe 34 and a first water inlet pipe 31. The upper left and right sides of the back of the valve body 3 are respectively provided with a second water inlet pipe 33 and a first water outlet pipe 32. The valve body 3 is characterized in that: the upper part of the inner periphery is provided with two water-proof chambers and two water passage chambers, and the lower part is provided with two transition chambers. The water passage chambers are connected to the corresponding transition chambers and are respectively connected to the first water inlet pipe 31 and the second water outlet pipe 34. The two water-proof chambers are respectively connected to the first water outlet pipe 32 and the second water inlet pipe 33. A plug valve core 4 is inserted into the middle of the valve body 3. The plug valve core 4 has a frustum-shaped structure with a larger upper part and a smaller lower part. The plug valve core 4 is conically sealed to each water-proof chamber, each water passage chamber and each transition chamber. Two sets of water passage structures are arranged side by side on the left and right sides of the plug valve.

[0029] When the two ends of the water passage structure are aligned with the water-proof cavity and the water passage cavity respectively, the first water inlet pipe 31 is connected to the first water outlet pipe 32, and the second water inlet pipe 33 is connected to the second water outlet pipe 34.

[0030] When the two ends of the water-passing structure are aligned with the two water-proof chambers respectively, the first water inlet pipe 31 is connected to the second water inlet pipe 33, and the first water outlet pipe 32 is connected to the second water outlet pipe 34.

[0031] In a preferred embodiment of this utility model, valve core 4 is further provided with valve core shaft 41 at the top and bottom center along the vertical direction. The two valve core shafts 41 are respectively connected to the upper flange cover 2 and the lower flange cover 5 bearings. The upper flange cover 2 and the lower flange cover 5 are respectively fastened to the top and bottom of the valve body 3 by bolts. The electric actuator 1 is fixedly installed on the top of the upper flange cover 2, and the valve core shaft 41 above is fixedly installed with the rotating end of the electric actuator 1.

[0032] Specifically, such as Figure 1 As shown, in order to reduce the production and assembly progress of this reversing valve and to achieve adjustable and controllable sealing effect, the plug valve core 4 is set as a frustum structure with a larger upper part and a smaller lower part, and the shapes of the long partition 36 and the short partition 38 are matched with it. By adjusting the installation of the plug valve core 4 up and down, the plug valve core 4 is connected more tightly as it goes down, which facilitates the installation and adjustment of this reversing valve. When the valve core changes size due to wear, it can be adjusted down to restore the valve core to normal operation, thereby effectively extending the service life of this reversing valve.

[0033] In a preferred embodiment of this utility model, two long partitions 36 and two short partitions 38 are evenly and alternately arranged along the vertical direction around the inner wall of the valve body 3. The length of the long partitions 36 is equal to the inner height of the valve body 3, and the length of the short partitions 38 is less than the inner height of the valve body 3. The top of the short partitions 38 is flush with the long partitions 36. A water-passing plate 35 and a water-blocking plate 37 are respectively arranged in the horizontal direction between the bottom of the short partitions 38, the middle of the two adjacent long partitions 36, and the inner wall of the valve body 3. The positions of the two water-passing plates 35 correspond to the positions of the first water inlet pipe 31 and the second water inlet pipe 33, respectively. There is a gap between the water-passing plates 35 and the outer surface of the plug valve core 4.

[0034] The water-blocking plate 37, the upper part of the corresponding long partition plate 36, the short partition plate 38, and the upper part of the inner wall of the valve body 3 form a water-blocking cavity;

[0035] The water passage plate 35, the upper part of the corresponding long partition plate 36, the short partition plate 38, and the upper part of the inner wall of the valve body 3 form a water passage cavity;

[0036] The bottom of the two long partitions 36 divides the lower part of the valve body 3 into two transition chambers.

[0037] In a preferred embodiment of the present invention, the water passage structure further includes a water passage hole 42 and a water passage groove 43 vertically opened from top to bottom in the stopcock valve core 4.

[0038] When a single water passage hole 42 connects the water-proof cavity and the water passage cavity, the two transition cavities are not connected;

[0039] When both water passages 42 are connected to the two water-proof cavities, the two water passage grooves 43 are connected to the two transition cavities.

[0040] Specifically, such as Figure 1-2 As shown, this reversing valve consists of a valve body 3 and a plug valve core 4. The plug valve core 4 is driven to rotate 45 degrees by an electric actuator 1 to switch between normal operation mode and backwash cleaning mode.

[0041] When this directional valve is in normal operating mode, such as Figure 3-4 The valve body 3 is divided into two independent spaces by the two opposing long partitions 36 tightly sealing the outer wall of the plug valve core 4. At this time, the two water passages 42 serve as the connecting channels for the first water inlet pipe 31 and the first water outlet pipe 32, the second water inlet pipe 33 and the second water outlet pipe 34, respectively, so that the water flows in the normal direction from the first water inlet pipe 31 to the first water outlet pipe 32, and from the second water inlet pipe 33 to the second water outlet pipe 34.

[0042] When the reversing valve is rotated 45 degrees into cleaning operation mode, such as Figure 5-6The two water passages 42 are deflected and aligned with the independent sealed space formed by the long partition 36, the short partition 38, the water baffle 37 and the inner wall of the valve body 3. At this time, the water flow flows back from the second outlet pipe 34 and can only enter the opposite independent sealed space after passing through the independent sealed space and the two water passages 42, and then exit from the first outlet pipe 32. Then, it enters the valve body 3 through the pipeline via the second inlet pipe 33. Since this space inside the valve body 3 is adjacent to the independent sealed space and is also sealed and water-proofed by the long partition 36 and the short partition 38, after the water flow enters, it can only go down through the water passage plate 35 to enter the lower part of the valve body 3. The upper part of the valve body 3 is sealed by the cooperation of the plug valve core 4 and the water baffle 37, and the water flow cannot go up. It can only pass through the two water passage grooves to enter the opposite space with the same structure, and then go up through the other water passage plate 35 and exit through the first inlet pipe 31, realizing the reversal of the water flow and thus realizing the backwashing of the water flow.

[0043] This reversing valve has a simple structure and is easy to operate. It is an important component of the fully automatic online tube brush cleaning system for condensers. It can clean the heat exchanger online without shutting down the chiller unit, improving the unit's heat exchange efficiency. It has high reliability and avoids the impact phenomenon caused by unstable water flow, thus driving the tube brush to reciprocate within the condenser pipes to clean the pipes. It also improves the reliability of the seal and has good application prospects. The working principle of the fully automatic online tube brush cleaning system for condensers has been disclosed in CN202123159024.6, "An Automatic Tube Brush Cleaning Equipment", and therefore will not be described in detail here.

[0044] In a preferred embodiment of this utility model, the lower part of the plug valve core 4 is provided with water grooves 43 in the same direction at each water passage hole 42. When both water passage holes 42 are connected to the first water outlet pipe 32 and the second water outlet pipe 34, the water flows into the valve body 3 through the second water inlet pipe 33, and flows through the water passage plate 35 and the water grooves 43 in sequence before flowing into the first water inlet pipe 31. In order to increase the water flow during the reversal, a plurality of water passage holes 351 are evenly provided on the surface of the water passage plate 35 along its length direction. By setting a large gap between the water passage plate 35 and the plug valve core 4, and further opening a plurality of water passage holes 351 on the surface of the water passage plate 35 to reduce the resistance of water flow impact, the stable operation of the valve body 3 is ensured during the reversal.

[0045] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A plug-type four-way directional valve, comprising a valve body (3) and an electric actuator (1), wherein the electric actuator (1) is fixedly installed at the top center of the valve body (3), a second outlet pipe (34) and a first inlet pipe (31) are respectively provided on the left and right sides of the upper front of the valve body (3), and a second inlet pipe (33) and a first outlet pipe (32) are respectively provided on the left and right sides of the upper back of the valve body (3), characterized in that: The valve body (3) has two water-proof chambers and two water-passing chambers on its upper part around its interior, and two transition chambers on its lower part. The water-passing chambers are connected to the corresponding transition chambers and are connected to the first water inlet pipe (31) and the second water outlet pipe (34) respectively. The two water-proof chambers are connected to the first water outlet pipe (32) and the second water inlet pipe (33) respectively. A stopcock valve core (4) is inserted into the middle of the valve body (3). The stopcock valve core (4) has a frustum-shaped structure that is larger at the top and smaller at the bottom. The stopcock valve core (4) is conically sealed to each of the water-proof chambers, each of the water-passing chambers and each of the transition chambers. Two sets of water passage structures are arranged side by side on the left and right sides of the stopcock valve. When the two ends of the water passage structure are aligned with the water-blocking cavity and the water passage cavity respectively, the first water inlet pipe (31) is connected to the first water outlet pipe (32), and the second water inlet pipe (33) is connected to the second water outlet pipe (34). When the two ends of the water passage structure are aligned with the two water-proof cavities respectively, the first water inlet pipe (31) is connected to the second water inlet pipe (33), and the first water outlet pipe (32) is connected to the second water outlet pipe (34).

2. The plug four-way reversing valve according to claim 1, characterized in that: Two long partitions (36) and two short partitions (38) are evenly and alternately arranged along the vertical direction around the inner wall of the valve body (3). The length of the long partition (36) is equal to the height inside the valve body (3), and the length of the short partition (38) is less than the height inside the valve body (3). Its top is flush with the long partition (36). A water-passing plate (35) and a water-blocking plate (37) are respectively arranged along the horizontal direction between the bottom of the short partition (38) and the middle of the two adjacent long partitions (36) and the inner wall of the valve body (3). The positions of the two water-passing plates (35) correspond to the positions of the first water inlet pipe (31) and the second water inlet pipe (33). There is a gap between the water-passing plate (35) and the outer surface of the plug valve core (4). The water-blocking plate (37), the upper part of the corresponding long partition plate (36), the short partition plate (38) and the upper part of the inner wall of the valve body (3) form the water-blocking cavity; The water passage plate (35), the upper part of the corresponding long partition plate (36), the short partition plate (38) and the upper part of the inner wall of the valve body (3) form the water passage cavity; The bottom of the two long partitions (36) divides the lower part of the valve body (3) into two transition chambers.

3. The spool-type four-way selector valve according to claim 2, characterized by: The water passage structure includes a water passage hole (42) and a water passage groove (43) that are vertically opened from top to bottom on the stopcock valve core (4). When a single water passage (42) connects the water-proof cavity and the water-passing cavity, the two transition cavities are not connected; When both water passages (42) are connected to the two water-proof cavities, the two water passages (43) are connected to the two transition cavities.

4. The plug-type four-way selector valve according to claim 3, characterized in that: The surface of the water-passing plate (35) is provided with a plurality of water-passing holes (351) evenly distributed along its length.

5. The plug four-way directional valve according to claim 1, characterized in that: The top and bottom center of the plug valve core (4) are provided with valve core shafts (41) in the vertical direction. The two valve core shafts (41) are respectively connected to the upper flange cover (2) and the lower flange cover (5) bearings. The upper flange cover (2) and the lower flange cover (5) are respectively fastened to the top and bottom of the valve body (3) by bolts. The electric actuator (1) is fixedly installed on the top of the upper flange cover (2). The valve core shaft (41) above is fixedly installed with the rotating end of the electric actuator (1).

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