A leakage-proof switching valve for RTO

Abstract

The application discloses a leakage-proof switching valve for RTO, which comprises a valve plate and an annular valve seat, an annular groove is formed in one side of the valve plate, an annular sealing ring is clamped in the annular groove, the annular sealing ring comprises an annular inner sealing strip and an annular outer sealing strip, an annular arc-shaped sealing strip is connected to the top of the annular inner sealing strip and the annular outer sealing strip, an elastic space is formed between the annular inner sealing strip and the annular outer sealing strip, a clamping step surface is formed in the middle of the side opposite to the annular inner sealing strip and the annular outer sealing strip, the clamping step surface is clamped into an annular rectangular cavity at the bottom of the annular sealing ring, and the valve plate extrudes the annular arc-shaped sealing strip during use. The utility model designs a sealing ring structure between the valve plate and the valve seat, and the sealing ring ensures anti-falling and effective sealing.

Description

Technical Field

[0001] This application relates to valve bodies, and more particularly to a leak-proof switching valve for RTO. Background Technology

[0002] RTO (Reactive Thermal Oxidizer) is a highly efficient organic waste gas treatment device characterized by high thermal efficiency, low operating costs, and the ability to handle large volumes of low-concentration waste gas. It is widely used in industries such as coatings, printing, inks, adhesives, chemical and plastics processing, food and beverage industries, and chemical industrial waste treatment plants to treat volatile organic compounds (VOCs) waste gas. As a core component of the RTO's automatic waste gas shut-off mechanism, the RTO switching valve faces challenges during operation. These challenges include ineffective sealing between the valve plate and seat, corrosion from high-temperature VOCs-containing waste gas, and untimely maintenance. These issues can lead to problems such as air leakage, wear, and even excessive emissions during switching, severely impacting the continuous and stable operation of the RTO and increasing the company's operating and maintenance costs. Utility Model Content

[0003] The purpose of this invention is to provide a leak-proof switching valve for RTO, which designs a sealing ring structure between the valve plate and the valve seat, ensuring that the sealing ring is not detached and provides an effective seal.

[0004] To achieve the above objectives, the present invention provides the following technical solution.

[0005] This application discloses a leak-proof switching valve for RTO, including a valve plate and an annular valve seat. The annular valve seat has an annular groove recessed on one side of the valve plate. An annular sealing ring is fitted inside the annular groove. The annular sealing ring includes an inner annular seal and an outer annular seal. A circumferential arc-shaped sealing strip is connected to the top of the inner annular seal and the outer annular seal. An elastic space is formed between the inner annular seal and the outer annular seal. A snap-fit ​​step surface is formed in the middle of the opposite side of the inner annular seal and the outer annular seal. The snap-fit ​​step surface is engaged with the annular rectangular cavity at the bottom of the annular sealing ring. In use, the valve plate compresses the circumferential arc-shaped sealing strip.

[0006] Preferably, in the above-mentioned leak-proof switching valve for RTO, the annular sealing ring is integrally formed.

[0007] Preferably, in the above-mentioned leak-proof switching valve for RTO, the inner and outer sides of the circumferential arc-shaped sealing strip protrude inward and outward, respectively.

[0008] Preferably, in the above-mentioned leak-proof switching valve for RTO, the annular sealing ring forms an annular Y-shaped cavity above the annular rectangular cavity, and the bottom width of the annular Y-shaped cavity is smaller than the top width of the annular rectangular cavity.

[0009] Preferably, the above-mentioned leak-proof switching valve for RTO further includes a valve shaft, which is mounted on the axis of the valve plate.

[0010] Preferably, in the above-mentioned leak-proof switching valve for RTO, one end of the valve shaft is fixed to the cylinder by a connector, and a locking screw perpendicular to the valve shaft axis is provided between the connector and the cylinder.

[0011] Preferably, in the above-mentioned leak-proof switching valve for RTO, the valve shaft passes through the valve body plate, and a first bushing and a second bushing are sequentially fitted on the valve shaft outside the valve body plate. A first ring, a second ring, and a third ring are sequentially fitted on the valve shaft inside the first bushing. The inner wall and outer wall of the second ring are respectively formed with an arc-shaped inner groove and an arc-shaped outer groove. Multiple connecting holes are arranged between the arc-shaped inner groove and the arc-shaped outer groove. A compressed air interface communicating with the arc-shaped outer groove is formed on one side of the first bushing.

[0012] Preferably, in the above-mentioned leak-proof switching valve for RTO, a stabilizing mechanism is provided at the middle and tail of the valve shaft, respectively. The stabilizing mechanism includes a limiting roller fitted to the bottom of the valve shaft and a deep groove ball bearing fitted to the upper sides of the valve shaft.

[0013] Preferably, in the above-mentioned leak-proof switching valve for RTO, the stabilizing mechanism is installed on the inner side of the valve body plate and inside the RTO.

[0014] Preferably, in the above-mentioned leak-proof switching valve for RTO, one end of the second bushing is inserted into the interior of the first bushing and fits against the third ring body, and a plurality of fixing bolts are provided between the outer flanges of the first bushing and the second bushing.

[0015] Compared with the existing technology, the advantage of this technical solution is that the sealing ring is inserted into the annular groove. Due to the elastic space between the inner and outer seals, the elastic space will be reduced after insertion, so that the inner and outer seals tend to expand outward. In addition, the annular stepped surface is set so that the sealing ring is stably inserted into the annular groove and will not fall off. The top forms an arc-shaped tip. When in use, the compression of the valve plate will make the sealing ring and the valve plate fit effectively, ensuring a seal. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1The diagram shown is a schematic of the leak-proof switching valve for RTO in an embodiment of this utility model;

[0018] Figure 2 The figure shown is a schematic cross-sectional view of the annular valve seat and the annular sealing ring in an embodiment of this utility model;

[0019] Figure 3 The diagram shown is a schematic diagram of the valve body plate in an embodiment of this utility model;

[0020] Figure 4 As shown Figure 3 Enlarged view of point A in the middle;

[0021] Figure 5 The diagram shown is a schematic of the stabilizing mechanism at the valve body plate in an embodiment of this utility model.

[0022] Figure 6 The image shown is a front view of the stabilizing mechanism at the valve body plate in an embodiment of this utility model.

[0023] Figure 7 The image shown is a front view of the stabilizing mechanism inside the RTO in an embodiment of this utility model. Detailed Implementation

[0024] The technical solutions of the present utility model will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0025] Combination Figure 1-7 As shown, the RTO leak-proof switching valve 100 includes a valve plate 101 and an annular valve seat 102. The annular valve seat 102 has an annular groove 103 recessed on one side of the valve plate 101. An annular sealing ring 104 is fitted inside the annular groove 103. The annular sealing ring 104 includes an inner annular seal 105 and an outer annular seal 106. A circumferential arc-shaped sealing strip 107 is connected to the top of the inner annular seal 105 and the outer annular seal 106. An elastic space 108 is formed between the inner annular seal 105 and the outer annular seal 106. A snap-fit ​​step surface 109 is formed in the middle of the opposite side of the inner annular seal 105 and the outer annular seal 106. The snap-fit ​​step surface 109 is engaged with the annular rectangular cavity 110 at the bottom of the annular sealing ring 104. In use, the valve plate 101 compresses the circumferential arc-shaped sealing strip 107.

[0026] In this embodiment, the structure is the internal mechanism of the valve body, omitting the external shell. The valve plate is used to block the flow in the middle of the annular valve seat. The sealing ring is inserted into the annular groove. Due to the elastic space between the inner and outer seals, the elastic space will be reduced after insertion, causing the inner and outer seals to tend to expand outward. An annular stepped surface is provided so that the sealing ring is stably inserted in the annular groove and will not fall off. The top forms an arc-shaped tip. When in use, the compression of the valve plate will make the sealing ring and the valve plate fit effectively, ensuring a seal.

[0027] Furthermore, the annular sealing ring 104 is integrally formed.

[0028] In this embodiment, the structural stability of the annular sealing ring is ensured, and the structure will not be lost under compression.

[0029] Furthermore, the inner and outer sides of the circumferential arc-shaped sealing strip 107 protrude inward and outward, respectively.

[0030] In this embodiment, this ensures that the inner and outer sides of the sealing ring are supported on the annular valve seat during compression, preventing the annular sealing ring from losing its structure and falling off after compression.

[0031] Furthermore, an annular sealing ring 104 forms an annular Y-shaped cavity 111 above the annular rectangular cavity 110, and the bottom width of the annular Y-shaped cavity 111 is smaller than the top width of the annular rectangular cavity 110.

[0032] In this embodiment, the stepped surface of the sealing ring is engaged, ensuring that the sealing ring will not fall off after compression.

[0033] Furthermore, it also includes a valve shaft 112, which is mounted on the axis of the valve plate 101.

[0034] Furthermore, one end of the valve shaft 112 is fixed to the cylinder 114 via a connector 113, and a locking screw (not shown in the figure) is provided between the connector 113 and the cylinder 114 along the axis perpendicular to the valve shaft 112.

[0035] In this embodiment, the cylinder shaft and valve shaft are ensured to always operate linearly and horizontally without any misalignment.

[0036] Furthermore, the valve shaft 112 passes through the valve body plate 116. A first bushing 117 and a second bushing 118 are sequentially fitted on the valve shaft 112 outside the valve body plate 116. A first ring body 119, a second ring body 120, and a third ring body 121 are sequentially fitted on the valve shaft 112 inside the first bushing 117. The inner and outer walls of the second ring body 120 are respectively formed with an arc-shaped inner groove 122 and an arc-shaped outer groove 123. Multiple connecting holes 124 are arranged between the arc-shaped inner groove 122 and the arc-shaped outer groove 123. A compressed air interface 125 communicating with the arc-shaped outer groove 123 is formed on one side of the first bushing 117.

[0037] In this embodiment, during use, to prevent gas leakage from the left side of the valve body plate through the connection, when compressed gas is injected, due to the low pressure on the left side of the valve body plate, the compressed gas will fill the inner and outer sides of the three rings, effectively preventing gas leakage. The connecting hole ensures that there is compressed gas between the inner and outer grooves, and then the compression will diffuse on the inner and outer walls of the three rings, preventing gas from the left side of the valve body plate from leaking to the right.

[0038] Furthermore, stabilizing mechanisms 126 are respectively provided at the middle and tail of the valve shaft 112. The stabilizing mechanism 126 includes a limiting roller 127 fitted to the bottom of the valve shaft 112 and a deep groove ball bearing 128 fitted to the upper sides of the valve shaft 112. The stabilizing mechanism 126 is installed on the inner side of the valve body plate 116 and inside the RTO.

[0039] In this embodiment, the valve shaft needs to move multiple times, which ensures the stability of the valve shaft position and its flexible operation.

[0040] Furthermore, one end of the second bushing 118 is inserted into the interior of the first bushing 117 and fits against the third ring body 121. Multiple fixing bolts 129 are provided between the outer flanges of the first bushing 117 and the second bushing 118.

[0041] In this embodiment, structural stability is ensured.

[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0043] The above description is only a specific embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A leak-proof switching valve for RTO, characterized in that, The device includes a valve plate and an annular valve seat. The annular valve seat has an annular groove recessed on one side of the valve plate. An annular sealing ring is fitted inside the annular groove. The annular sealing ring includes an inner annular seal and an outer annular seal. A circumferential arc-shaped sealing strip is connected to the top of the inner and outer annular seals. An elastic space is formed between the inner and outer annular seals. A snap-fit ​​step surface is formed in the middle of the opposite side of the inner and outer annular seals. The snap-fit ​​step surface is engaged with the annular rectangular cavity at the bottom of the annular sealing ring. In use, the valve plate compresses the circumferential arc-shaped sealing strip.

2. The leak-proof switching valve for RTO according to claim 1, characterized in that, The annular sealing ring is integrally formed.

3. The leak-proof switching valve for RTO according to claim 1, characterized in that, The inner and outer sides of the circumferential arc-shaped sealing strip protrude inward and outward, respectively.

4. The leak-proof switching valve for RTO according to claim 1, characterized in that, The annular sealing ring forms an annular Y-shaped cavity above the annular rectangular cavity, and the bottom width of the annular Y-shaped cavity is smaller than the top width of the annular rectangular cavity.

5. The leak-proof switching valve for RTO according to claim 1, characterized in that, It also includes a valve shaft, which is mounted on the axis of the valve plate.

6. The leak-proof switching valve for RTO according to claim 5, characterized in that, One end of the valve shaft is fixed to the cylinder by a connector, and a locking screw perpendicular to the valve shaft axis is provided between the connector and the cylinder.

7. The leak-proof switching valve for RTO according to claim 5, characterized in that, The valve shaft passes through the valve body plate. A first bushing and a second bushing are sequentially fitted on the valve shaft outside the valve body plate. A first ring, a second ring, and a third ring are sequentially fitted on the valve shaft inside the first bushing. The inner and outer walls of the second ring are respectively formed with an arc-shaped inner groove and an arc-shaped outer groove. Multiple connecting holes are arranged between the arc-shaped inner groove and the arc-shaped outer groove. A compressed air interface connecting the arc-shaped outer groove is formed on one side of the first bushing.

8. The leak-proof switching valve for RTO according to claim 5, characterized in that, The valve shaft is provided with stabilizing mechanisms at its middle and tail sections. The stabilizing mechanisms include limiting rollers fitted to the bottom of the valve shaft and deep groove ball bearings fitted to the upper sides of the valve shaft.

9. The leak-proof switching valve for RTO according to claim 8, characterized in that, The stabilizing mechanism is installed on the inside of the valve body plate and inside the RTO.

10. The leak-proof switching valve for RTO according to claim 7, characterized in that, One end of the second bushing is inserted into the interior of the first bushing and fits against the third ring body. Multiple fixing bolts are provided between the outer flanges of the first bushing and the second bushing.

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