A valve assembly for chemical wastewater treatment

Abstract

The utility model discloses a valve assembly for chemical sewage treatment relates to chemical sewage treatment technical field. The utility model discloses a first valve body, second valve body and ball valve head. Ball valve head and two valve body sliding seal cooperation, and the spring washer is equipped with through fastening screw connection between the valve body, and the spring washer is equipped with, the outside sets up the seal sleeve and the seal buckle board and forms the outer covering seal layer, and the outside fastening screw's thread hole inserts the elastic column to realize self -tightening pre -pressing. The fluid is connected through the rotation of ball valve head and is realized, and the valve body is located to the joint of ball valve head symmetry plane and forms the inner layer seal, and the outside seal sleeve constitutes the outer layer seal, and forms double independent seal path.

Description

Technical Field

[0001] This utility model relates to the field of chemical wastewater treatment technology, specifically a valve assembly for chemical wastewater treatment. Background Technology

[0002] Currently, most chemical wastewater conveying systems use a single-seal structure, where fluid isolation is achieved through a single-layer sealing ring between the valve body and the ball valve head. This single-seal structure is highly susceptible to leakage due to low-temperature shrinkage of the sealing material or thermal expansion and contraction of the valve body caused by changes in ambient temperature. Furthermore, traditional ball valves typically employ a two-section butt-joint structure, but the joint between the two valve bodies lacks an effective self-tightening compensation design, leading to seal failure due to pressure differences during the flow of chemical wastewater. Existing connecting bolts between valve bodies are mostly rigid connections, unable to maintain stable preload under vibration or thermal cycling, resulting in external water leakage or valve body cracking during long-term operation. Summary of the Invention

[0003] To overcome the shortcomings of the prior art, this utility model provides the following technical solution: a valve assembly for chemical wastewater treatment, comprising a first valve body and a second valve body, wherein the first valve body and the second valve body seal and enclose a ball valve head, and the circumferential surface of the ball valve head slides and seals with the first valve body and the second valve body; a valve stem that is fixedly fitted to the ball valve head is rotatably inserted into the radial position of the first valve body; an outer sealing sleeve is sleeved on the outer side of the first valve body and the second valve body, the outer sealing sleeve being used to seal the joint position of the first valve body and the second valve body.

[0004] Preferably, the first valve body and the second valve body are fastened together by a plurality of internal fastening screws, and a spring washer is pressed and provided at the contact position between the head of the internal fastening screw and the side of the second valve body.

[0005] Preferably, an outer sealing buckle plate is provided on the outer side of the second valve body. The outer sealing buckle plate and the outer sealing sleeve are fastened together by multiple outer fastening screws. An elastic column is inserted into the threaded hole where the outer sealing sleeve and the outer fastening screw are threaded together. The elastic column is used to provide outward elastic force to the outer fastening screw, and the elastic column is pressed into the bottom of the threaded hole by the outer fastening screw.

[0006] Preferably, a first valve pipe and a second valve pipe are coaxially connected on the first valve body and the second valve body, respectively, and a flange is fixedly installed on both the second valve pipe and the first valve pipe.

[0007] Preferably, the outer sealing sleeve makes a sealing fit with the side of the first valve body, and the outer sealing sleeve slides and seals on the circumferential surface of the first valve tube; a gap is left between the side of the outer sealing buckle and the side end face of the second valve body, which is used to accommodate the head of the inner fastening screw. At the same time, this gap also ensures that when the outer fastening screw is connected to the outer sealing sleeve, the inner wall of the outer sealing buckle contacts the head of the inner fastening screw, ensuring that the outer sealing sleeve and the outer sealing buckle completely enclose the first and second valve bodies.

[0008] Compared with the prior art, the present invention has the following advantages: (1) This utility model adds an outer sealing sleeve and an outer sealing buckle to the outside of the joint between the first valve body and the second valve body, so that the ball valve forms a double sealing structure inside and outside. The inner sealing is achieved by the sliding fit between the ball valve head and the valve body, and the outer sealing is achieved by the sealing sleeve and buckle completely wrapping the joint area of ​​the valve body. Thus, even if the inner sealing leaks due to temperature difference or wear, the outer layer can still effectively block the leakage of chemical wastewater, greatly improving the safety and reliability of the system. (2) In this utility model, an elastic column is set in the threaded hole of the outer sealing sleeve and pressed in by the outer fastening screw to achieve elastic pre-tightening of the threaded connection and effectively prevent the problem of loose sealing. (3) A spring washer is provided between the head of the inner fastening screw and the second valve body of this utility model to buffer external vibration. Compared with the traditional rigid fastening method, it can significantly extend the service life of the threaded connection and reduce the maintenance frequency; (4) The valve body of this utility model is positioned at the symmetrical plane of the ball valve head to ensure symmetrical fluid pressure action and avoid local leakage or structural deformation caused by uneven force. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0010] Figure 2 This is an exploded view of the overall structure of this utility model.

[0011] Figure 3 This is an exploded view of the valve body structure of this utility model.

[0012] In the diagram: 101-First valve body; 102-Second valve body; 103-Second valve pipe; 104-First valve pipe; 105-Valve stem; 106-Ball valve head; 107-Inner fastening screw; 108-Spring washer; 109-Outer sealing plate; 110-Outer sealing sleeve; 111-Outer fastening screw; 112-Elastic column; 113-Flange. Detailed Implementation

[0013] The following is in conjunction with the appendix Figures 1-3 The technical solution of this utility model will be further illustrated through specific implementation methods.

[0014] This utility model provides a valve assembly for chemical wastewater treatment, including a first valve body 101 and a second valve body 102. The first valve body 101 and the second valve body 102 seal and enclose a ball valve head 106, and the circumferential surface of the ball valve head 106 slides and seals with the first valve body 101 and the second valve body 102. A valve stem 105, which is fixedly engaged with the ball valve head 106, is rotatably and sealingly inserted into the radial position of the first valve body 101. An outer sealing sleeve 110 is sleeved on the outer side of the first valve body 101 and the second valve body 102 to seal the joint between the first valve body 101 and the second valve body 102. The first valve body 101 and the second valve body 102 are fastened together by multiple inner fastening screws 107. A spring washer 108 is pressed and disposed at the contact position between the head of the inner fastening screw 107 and the side of the second valve body 102. An outer sealing plate 109 is fitted on the outer side of the second valve body 102. The outer sealing plate 109 and the outer sealing sleeve 110 are fastened together by multiple outer fastening screws 111. An elastic post 112 is inserted into the threaded hole where the outer sealing sleeve 110 and the outer fastening screw 111 are threaded together. The elastic post 112 provides outward elastic force to the outer fastening screw 111, and the outer fastening screw 111 presses the elastic post 112 into the bottom of the threaded hole. A first valve pipe 104 and a second valve pipe 103 are coaxially connected on the first valve body 101 and the second valve body 102, respectively. A flange 113 is fixedly installed on both the second valve pipe 103 and the first valve pipe 104. The outer sealing sleeve 110 is in sealing contact with the side of the first valve body 101, and the outer sealing sleeve 110 is slidably sealed on the circumferential surface of the first valve tube 104. A gap is left between the side of the outer sealing plate 109 and the side end face of the second valve body 102, which is used to accommodate the head of the inner fastening screw 107. At the same time, this gap also ensures that when the outer fastening screw 111 is connected to the outer sealing sleeve 110, the inner wall of the outer sealing plate 109 contacts the head of the inner fastening screw 107, ensuring that the outer sealing sleeve 110 and the outer sealing plate 109 completely enclose the first valve body 101 and the second valve body 102.

[0015] The working principle of the valve assembly for chemical wastewater treatment disclosed in this utility model is as follows: Rotating the valve stem 105 causes the ball valve head 106 to rotate synchronously. The rotation of the ball valve head 106 connects or disconnects the communication path between the first valve pipe 104 and the second valve pipe 103. To ensure the sealing between the first valve body 101 and the second valve body 102, the seam of the first valve body 101 and the second valve body 102 is positioned on the symmetrical plane of the ball valve head 106. This creates a primary seal through the sealing structure between the ball valve head 106 and the first valve body 101 and the second valve body 102. Simultaneously, an outer sealing sleeve 110 is fitted on the outer side of the seam of the first valve body 101 and the second valve body 102, forming a secondary seal. This, combined with the seal at the seam of the first valve body 101 and the second valve body 102 themselves, ensures the sealing stability between the first valve body 101, the second valve body 102, and the ball valve head 106.

Claims

1. A valve assembly for chemical wastewater treatment, characterized in that: It includes a first valve body (101) and a second valve body (102), the first valve body (101) and the second valve body (102) sealingly enclose the ball valve head (106), and the circumferential surface of the ball valve head (106) slides and seals with the first valve body (101) and the second valve body (102); The first valve body (101) has a valve stem (105) that is fixedly fitted to the ball valve head (106) in a radial position. An outer sealing sleeve (110) is provided on the outer side of the first valve body (101) and the second valve body (102). The outer sealing sleeve (110) is used to seal the joint position of the first valve body (101) and the second valve body (102).

2. The valve assembly for chemical wastewater treatment according to claim 1, characterized in that: The first valve body (101) and the second valve body (102) are connected by multiple inner fastening screws (107) threaded fastening. A spring washer (108) is pressed and provided at the contact position between the head of the inner fastening screw (107) and the side of the second valve body (102).

3. A valve assembly for chemical wastewater treatment according to claim 2, characterized in that: The outer side of the second valve body (102) is fitted with an outer sealing buckle plate (109). The outer sealing buckle plate (109) and the outer sealing sleeve (110) are fastened together by multiple outer fastening screws (111). An elastic column (112) is inserted into the threaded hole where the outer sealing sleeve (110) and the outer fastening screw (111) are threaded together. The elastic column (112) is used to provide outward elastic force to the outer fastening screw (111). The elastic column (112) is pressed into the bottom of the threaded hole by the outer fastening screw (111).

4. A valve assembly for chemical wastewater treatment according to claim 3, characterized in that: The first valve body (101) and the second valve body (102) are respectively coaxially connected with the first valve pipe (104) and the second valve pipe (103), and the second valve pipe (103) and the first valve pipe (104) are both fixedly installed with flanges (113).

5. A valve assembly for chemical wastewater treatment according to claim 4, characterized in that: The outer sealing sleeve (110) is in contact with the side of the first valve body (101) for sealing fit. The outer sealing sleeve (110) is slidably sealed on the circumferential surface of the first valve tube (104). A gap is left between the side of the outer sealing buckle plate (109) and the side end face of the second valve body (102), which is used to accommodate the head of the inner fastening screw (107).

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