A double-tower dryer for locomotives with a drainable air inlet and exhaust valve

Abstract

The utility model relates to a locomotive double -tower dryer with the exhaust of admission and exhaust valve in the technical field of locomotive dryer, contain valve body, valve cavity and first valve core, two first pneumatic control chambers are separated in the both ends of valve cavity, the valve body is equipped with air inlet and two exhaust ports, the middle hole chamber that is equipped with the middle hole chamber of intercommunication air inlet in the valve cavity, the both ends of middle hole chamber are equipped with the first valve control chamber of intercommunication corresponding exhaust port, first valve control chamber can be disconnected or intercommunication with middle hole chamber when the first pneumatic control chamber pressure increases or reduces in the vicinity, the second pneumatic control chamber and second valve control chamber that are respectively connected with corresponding first pneumatic control chamber and first valve control chamber are equipped with in the lower part of valve body, the lower part of valve body is equipped with the drain, the inner end of second valve control chamber is equipped with the transition hole chamber of intercommunication drain, second valve control chamber can be connected or disconnected with corresponding transition hole chamber through second valve core when the second pneumatic control chamber pressure increases or reduces in the vicinity, this admission and exhaust valve can effectively discharge the water in valve.

Description

Technical Field

[0001] This utility model relates to the field of locomotive dryer technology, and in particular to an intake and exhaust valve with drainage for a locomotive double-tower dryer. Background Technology

[0002] For example, Chinese patent CN107642632A discloses an intake valve for a locomotive dual-tower air dryer, which combines two valves used to control the switching of intake for gas drying between the two towers into one unit. The valve core is pneumatically controlled by two solenoid valves to achieve a three-way switching between one intake port and two exhaust ports. Although this existing structure is more intelligent and compact while achieving continuous drying between the two towers, it also has certain drawbacks. Typically, each dryer has two states: adsorption drying and gas regeneration. When the exhaust port of one dryer is connected to the inlet port for gas drying, the exhaust port and inlet port of the other dryer are closed. Because the gas to be treated is relatively humid, some water will accumulate in the valve cavity after a period of use and cannot be discharged. This will affect the service life of the valve and may also cause the desiccant to fail prematurely, block the control pipeline, and cause dryer failure. Utility Model Content

[0003] In order to overcome the shortcomings in the background technology and solve the existing technical problems, this utility model discloses an intake and exhaust valve with drainage for a locomotive double tower dryer, which can effectively drain the water accumulated in the valve.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A drain valve for a locomotive twin-tower dryer includes a valve body, a valve chamber, and a first valve core slidably disposed within the valve chamber. The valve chamber has two first pneumatically controlled chambers separated at both ends by the first valve core, each capable of reciprocating movement of the first valve core due to pressure changes. The valve body has an air inlet and two exhaust ports corresponding to the two ends of the first valve core. The valve chamber has a central cavity connected to the air inlet, and each end of the central cavity has a first valve-controlled chamber connected to the corresponding exhaust port. The first valve-controlled chambers can reciprocate through adjacent first exhaust ports. When the air pressure in the first air control chamber increases or decreases, it is disconnected from or connected to the middle hole chamber. The valve chamber is located in the upper part of the valve body. The lower part of the valve body, corresponding to the valve chamber, is provided with a second air control chamber and a second valve control chamber that are respectively connected to the corresponding first air control chamber and the first valve control chamber. The lower part of the valve body is provided with a drain port. The inner end of the second valve control chamber is provided with a transition chamber that is connected to the drain port. The second valve control chamber can be connected to or disconnected from the corresponding transition chamber through the second valve core when the air pressure in the adjacent second air control chamber increases or decreases.

[0005] Furthermore, the inner end of the second valve-controlled chamber is connected to the outer end of the transition chamber. The second valve core includes a partition that separates the second pneumatic control chamber and the second valve-controlled chamber. The partition has a sliding hole in the center corresponding to the transition chamber. A mandrel is slidably and sealingly inserted in the sliding hole. The head end of the mandrel can be sealed by contacting the outer port of the transition chamber. The tail end of the mandrel is enlarged to form a disc seat that slides and seals with the inner wall of the second pneumatic control chamber. The disc seat divides the inner and outer sides of the second pneumatic control chamber into an inner cavity segment that connects to the first pneumatic control chamber and an outer cavity segment that connects to the external environment. A compression spring is connected between the tail end face of the mandrel and the outer end face of the second pneumatic control chamber.

[0006] Furthermore, a top ring is coaxially and detachably fixed to the head end of the mandrel, and a sealing ring is provided on the inner ring surface of the top ring. The outer edge of the outer port of the transition chamber is provided with an annular protrusion that can correspond to and abut against the sealing ring.

[0007] Furthermore, the core rod has a guide hole at the center of its tail end face for inserting the corresponding end of the compression spring, and the outer end wall of the second pneumatic control chamber has a pressure relief hole that connects to the external environment.

[0008] Furthermore, the outer end of the spacer kit is snapped and fixed to the inner side wall of the second pneumatic control chamber.

[0009] Furthermore, the drain outlet is located at the center of the lower surface of the valve body, and the transition chamber is axially horizontal with its inner end connected to the drain outlet.

[0010] Furthermore, two solenoid valves are installed on the front side of the outer surface of the valve body, which are used to control the air intake and depressurization of the two first pneumatic control chambers respectively.

[0011] Furthermore, the air inlet is located at the upper center of the front side of the valve body, and the two exhaust ports are located at both ends of the upper surface of the valve body.

[0012] By adopting the technical solution described above, this utility model has the following beneficial effects: This utility model discloses a locomotive dual-tower dryer with a drainage intake and exhaust valve. It cleverly utilizes the alternating working process of one tower for forward drying and the other for backflushing regeneration. When the intake port and the two exhaust ports of the intake and exhaust valves are switched and connected, the first valve core is moved to disconnect the air pressure in the first valve control chamber. At the same time, the corresponding second valve core below is controlled to open the downward drainage passage of the first valve control chamber. Then, the high pressure of the backflushing can quickly blow the water accumulated in the first and second valve control chambers out of the valve body, thereby quickly draining the water left by the humid gas during the previous forward drying, ensuring the normal and continuous use of the dryer and extending the service life of the valve. Attached Figure Description

[0013] Figure 1 This is a top view of the structure of this utility model; Figure 2 yes Figure 1 A schematic diagram of the cross-sectional structure; Figure 3 yes Figure 2 A magnified structural diagram of part A; Figure 4 This is a side view of the structure of this utility model.

[0014] In the diagram: 1. First valve core; 2. Valve body; 3. Central bore chamber; 4. Exhaust port; 5. First valve control chamber; 6. First pneumatic control chamber; 7. Second valve core; 701. Core rod; 702. Spacer assembly; 703. Compression spring; 704. Disc seat; 705. Top ring; 8. Second pneumatic control chamber; 801. Inner cavity section; 802. Outer cavity section; 9. Second valve control chamber; 10. Transition chamber; 11. Drain port; 12. Pressure relief hole; 13. Solenoid valve. Detailed Implementation

[0015] The technical solution of this utility model will be described below with reference to the accompanying drawings of the embodiments of this utility model. In the description, it should be understood that if there are terms such as "upper", "lower", "front", "rear", "left", "right" indicating the orientation or positional relationship, they are only corresponding to the drawings of this utility model for the convenience of describing this utility model, and do not indicate or imply that the device or element referred to must have a specific orientation.

[0016] Combined with appendix Figure 1-4 The locomotive double-tower dryer uses an inlet and outlet valve with drainage, comprising a valve body 2, a valve cavity, and a first valve core 1 slidably disposed in the valve cavity, as shown in the attached figure. Figure 2 As shown, the first valve core 1 is horizontally positioned in the valve cavity. The valve cavity is divided at both ends by the first valve core 1 into two first pneumatically controlled chambers 6, which can slide axially back and forth due to changes in air pressure. Depending on the requirements, two solenoid valves 13 are installed on the front of the outer surface of the valve body 2 to control the intake and depressurization of the two first pneumatically controlled chambers 6, respectively. Typically, the control gas originates from a portion of the high-pressure gas that has been dried by a dryer. When the gas flows through the solenoid valves 13... Figure 2When air enters the first air-controlled chamber 6 on the left, the first valve core 1 moves to the right. At this time, the gas in the first air-controlled chamber 6 on the right will be automatically depressurized and discharged, and vice versa. The valve body 2 is provided with an air inlet and two exhaust ports 4 corresponding to the two ends of the first valve core 1. Specifically, the air inlet is located at the center of the upper front of the outer surface of the valve body 2 (not shown in the figure), and the two exhaust ports 4 are located at both ends of the upper surface of the valve body 2. The valve cavity has a central hole chamber 3 connected to the air inlet in the middle. Both ends of the central hole chamber 3 are provided with first valve-controlled chambers 5 connected to the corresponding exhaust ports 4. The first valve-controlled chambers 5 can... When the air pressure in the adjacent first pneumatic control chamber 6 increases or decreases, it can disconnect or connect with the central hole chamber 3. Specifically, the connection and disconnection are achieved by piston plugs that are detachably fixed at both ends of the first valve core 1. The outer diameter expansion part of the piston plug separates the first pneumatic control chamber 6 and the first valve control chamber 5. The inner end face of the piston plug achieves the disconnection and connection between the first valve control chamber 5 and the central hole chamber 3 by contacting or moving away from the outer edge of the corresponding port of the central hole chamber 3. The control principle of this part has been fully disclosed in the prior art introduced in the background art, and will not be elaborated further here. The valve chamber is located on the upper part of the valve body 2. At the lower end of the valve body 2, corresponding to the valve chamber, are provided second pneumatic control chambers 8 and 9, respectively connecting the corresponding first pneumatic control chamber 6 and first valve control chamber 5. This connection is unaffected by the movement of the first valve core 1, meaning that the air pressure changes are the same in the first pneumatic control chamber 6 and the second pneumatic control chamber 8, and the first valve control chamber 5 and the second valve control chamber 9 remain connected. A drain outlet 11 is provided at the lower part of the valve body 2, and a transition chamber 10 connecting the drain outlet 11 is provided at the inner end of the second valve control chamber 9. Specifically, the drain outlet 11 is designed with… At the center of the lower surface of valve body 2, the transition chamber 10 is axially horizontal and its inner end is connected to the drain port 11 to ensure smooth drainage. The second valve control chamber 9 can be connected or disconnected with the corresponding transition chamber 10 through the second valve core 7 when the air pressure of the adjacent second air control chamber 8 increases or decreases. Specifically, if the second air control chamber 8 increases the air pressure along with the first air control chamber 6, then the exhaust port 4, the first valve control chamber 5, the second valve control chamber 9, the transition chamber 10 and the drain port 11 on the corresponding side will form a passage to discharge the accumulated water using reverse pressure.

[0017] As needed, the inner end of the second valve-controlled chamber 9 is correspondingly connected to the outer end of the transition chamber 10. The second valve core 7 includes a partition 702 that separates the second pneumatic control chamber 8 and the second valve-controlled chamber 9, as shown in the attached figure. Figure 3As shown, the outer end face of the spacer 702 has a groove in the center. After being snapped and fixed to the inner side wall of the second pneumatic control chamber 8, the groove actually becomes the second pneumatic control chamber 8. The center of the spacer 702 has a sliding hole corresponding to the transition chamber 10. A mandrel 701 is slidably and sealingly inserted into the sliding hole. A sealing ring is provided between the sliding hole and the mandrel 701 to achieve a sliding seal. The head end of the mandrel 701 can correspondingly abut against the outer port of the transition chamber 10 for sealing. Specifically, a top ring 705 is coaxially and detachably fixed to the head end of the mandrel 701. The top ring 705 is fitted onto the step at the head end of the mandrel 701. A screw is then screwed into the center of the head end face of the mandrel 701 to tighten and fix the top ring 705. The inner ring surface of the top ring 705 has a sealing ring groove with a sealing ring. The outer edge of the outer port of the transition chamber 10 has an annular protrusion that can correspondingly abut against the sealing ring. The mandrel 701 has an enlarged tail end that forms a disc seat 704 that slides and seals with the inner wall of the second pneumatic control chamber 8. The outer wall of the disc seat 704 is also fitted with a sealing ring. The disc seat 704 divides the second pneumatic control chamber 8 into an inner cavity section 801 that connects to the first pneumatic control chamber 6 and an outer cavity section 802 that connects to the external environment. The connection between these sections is not affected by the movement of the mandrel 701. A compression spring 703 is connected between the tail end face of the mandrel 701 and the outer end face of the second pneumatic control chamber 8, which makes the mandrel 701 tend to move inward to abut the outer edge of the outer port of the transition chamber 10. Specifically, the center of the tail end face of the mandrel 701 is provided with a guide hole for the corresponding end of the compression spring 703 to be inserted. The outer end wall of the second pneumatic control chamber 8 is provided with a pressure relief hole 12 that connects to the external environment, so that the outer cavity section 802 is always connected to the outside.

[0018] To implement the locomotive double-tower dryer described in this utility model, the two bottom pipes of the double-tower dryer are generally connected to the two exhaust ports 4 of the intake and exhaust valve. This allows the moisture to be dried coming out of the exhaust ports 4 to enter the dryer for drying. During backflushing regeneration of the dryer, high-pressure gas can also enter the exhaust ports 4 in the reverse direction. In specific use, with the left tower regenerating and the right tower drying, the left solenoid valve 13 is controlled to pressurize the first air control chamber 6 and the second air control chamber 8 on the left. The first valve core 1 moves to the right, cutting off the moisture entry passage between the left exhaust port 4 and the air inlet. Simultaneously... When the lower second valve core 7 moves to the left, it opens the drainage passage connecting the left exhaust port 4, the first valve control chamber 5, the second valve control chamber 9, the transition chamber 10, and the drain port 11. Even in some depressions, water can be blown out by instantaneous high pressure. The left first air control chamber 6 and the second air control chamber 8 are both in a depressurized state. The moisture entry passage between the left exhaust port 4 and the air inlet is opened. The lower second valve core 7 moves to the left under the action of the spring, closing the drainage passage between the left second valve control chamber 9 and the transition chamber 10. If the left tower is dry and the right tower is regenerated, the action is reversed.

[0019] The parts of this utility model not described in detail are prior art. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that this utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the above embodiments should be regarded as exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended to include all changes that fall within the meaning and scope of the equivalents of the claims in this utility model, and no reference numerals in the claims should be regarded as limiting the content of the claims.

Claims

1. A drain valve for a locomotive double-tower dryer, comprising a valve body, a valve cavity, and a first valve core slidably disposed in the valve cavity. The valve cavity is divided at both ends by the first valve core into two first pneumatically controlled chambers capable of reciprocating sliding by pressure changes. The valve body has an air inlet and two exhaust ports corresponding to the two ends of the first valve core. The valve cavity has a central cavity communicating with the air inlet. Each end of the central cavity has a first valve-controlled chamber communicating with the corresponding exhaust port. The first valve-controlled chamber can disconnect from or communicate with the central cavity when the air pressure in the adjacent first pneumatically controlled chamber increases or decreases. The valve body is characterized by: The valve chamber is located at the upper part of the valve body. The lower part of the valve body, corresponding to the valve chamber, is provided with a second pneumatic control chamber and a second valve control chamber that are respectively connected to the corresponding first pneumatic control chamber and the first valve control chamber. The lower part of the valve body is provided with a drain port. The inner end of the second valve control chamber is provided with a transition chamber that is connected to the drain port. The second valve control chamber can be connected or disconnected with the corresponding transition chamber through the second valve core when the air pressure in the adjacent second pneumatic control chamber increases or decreases.

2. The inlet and outlet valve with drainage for the locomotive double-tower dryer according to claim 1, characterized in that: The inner end of the second valve control chamber is connected to the outer end of the transition chamber. The second valve core includes a partition that separates the second pneumatic control chamber and the second valve control chamber. The partition has a sliding hole in the center corresponding to the transition chamber. A mandrel is slidably and sealingly inserted in the sliding hole. The head end of the mandrel can be sealed against the outer port of the transition chamber. The tail end of the mandrel is enlarged to form a disc seat that slides and seals with the inner wall of the second pneumatic control chamber. The disc seat divides the inner and outer sides of the second pneumatic control chamber into an inner cavity segment that connects to the first pneumatic control chamber and an outer cavity segment that connects to the external environment. A compression spring is connected between the tail end face of the mandrel and the outer end face of the second pneumatic control chamber.

3. The inlet and outlet valve with drainage for the locomotive double-tower dryer according to claim 2, characterized in that: The head end of the mandrel is coaxially and detachably fixed with a top ring. The inner ring surface of the top ring is provided with a sealing ring, and the outer edge of the outer port of the transition chamber is provided with an annular protrusion that can correspond to and abut against the sealing ring.

4. The inlet and outlet valve with drainage for the locomotive double-tower dryer according to claim 2, characterized in that: The core rod has a guide hole at the center of its tail end face to accommodate the insertion of the corresponding end of the compression spring, and the outer end wall of the second pneumatic control chamber has a pressure relief hole that connects to the external environment.

5. The inlet and outlet valve with drainage for the locomotive double-tower dryer according to claim 2, characterized in that: The outer end of the spacer kit is snapped and fixed to the inner side wall of the second air control chamber.

6. The inlet and outlet valve with drainage for the locomotive double-tower dryer according to claim 1, characterized in that: The drain outlet is located at the center of the lower surface of the valve body, and the transition chamber is axially horizontal with its inner end connected to the drain outlet.

7. The inlet and outlet valve with drainage for a locomotive double-tower dryer according to claim 1, characterized in that: Two solenoid valves are installed on the front side of the outer surface of the valve body, which are used to control the air intake and depressurization of the two first pneumatic control chambers respectively.

8. The inlet and outlet valve with drainage for the locomotive double-tower dryer according to claim 1, characterized in that: The air inlet is located at the center of the upper front side of the valve body, and the two exhaust ports are located at both ends of the upper surface of the valve body.

Images