A check valve body

Abstract

The utility model discloses a check valve body, include: valve body, a pair of filter screen and check mechanism. The both ends of valve body are provided with water inlet end and water outlet end respectively. A pair of filter screen is installed in water inlet end and water outlet end respectively. Check mechanism is installed in valve body, and check mechanism includes: fixed ring and top flow cover, and the fixed ring is fixed on the inner wall of valve body, and the first mobile ring, second mobile ring and third mobile ring are sequentially arranged from outside to inside in the fixed ring, and the first mobile ring slides on the inner wall of fixed ring, and the second mobile ring slides on the inner wall of first mobile ring, and the third mobile ring slides on the inner wall of second mobile ring, and the first mobile ring, second mobile ring and third mobile ring all slide to the side of water outlet end, and the top flow cover is fixed on the one end of third mobile ring close to water outlet end, and the inner wall of one end of valve body close to water outlet end is fixed with the flow cover. The utility model discloses through the relevant structure design, has effectively improved the check effect of check valve.

Description

Technical Field

[0001] This utility model belongs to the field of check valve technology, specifically relating to a check valve body. Background Technology

[0002] A check valve is a type of valve whose opening and closing element is a circular valve disc. It relies on its own weight and the pressure of the medium to actuate and prevent backflow. It belongs to the category of automatic valves and is also known as a non-return valve, one-way valve, reflux valve, or isolation valve. Check valves have two types of disc movement: lift-type and swing-type. A lift-type check valve consists of a valve body and a valve disc. The valve disc slides within the valve body, and the inlet height of the valve body is lower than the outlet height. The medium flows in from the lower inlet and out from the higher outlet. When the inlet pressure is greater than the weight of the valve disc, the disc is pushed by the medium to slide and open the valve. Conversely, when the medium flows backward, the valve closes.

[0003] In the prior art, CN202221589452.4 discloses a check valve, including a valve body, with an inlet pipe and an outlet pipe respectively connected to both ends of the valve body. A sealing element is provided inside the valve body, and a fixing rod is fixedly provided inside the inlet pipe. An elastic element is provided on the fixing rod, and the end of the elastic element away from the fixing rod is fixedly connected to the sealing element and drives the sealing element to abut against the inlet pipe.

[0004] In actual use, the sealing component is connected only through the elastic element. If the valve body is placed horizontally, the sealing component will move downward due to its own weight, which will cause misalignment between the valve body and the inlet. In addition, the elastic element is prone to bending and deformation due to its own elastic compression, which will affect the check valve effect.

[0005] Therefore, in order to address the above-mentioned technical problems, it is necessary to provide a check valve body.

[0006] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0007] The purpose of this invention is to provide a check valve body that can solve the problem of poor check valve performance in existing check valves.

[0008] To achieve the above objectives, the technical solution provided by a specific embodiment of this utility model is as follows:

[0009] A check valve body includes: a valve body, a pair of filter screens, and a check mechanism.

[0010] The valve body has an inlet and an outlet at its two ends. A pair of filter screens are installed in the inlet and outlet ends respectively. The check mechanism is installed in the valve body and includes a fixed ring and a top flow shroud. The fixed ring is fixed to the inner wall of the valve body. Inside the fixed ring, a first moving ring, a second moving ring, and a third moving ring are arranged sequentially from the outside to the inside. The first moving ring slides on the inner wall of the fixed ring, the second moving ring slides on the inner wall of the first moving ring, and the third moving ring slides on the inner wall of the second moving ring. The first, second, and third moving rings all slide towards the outlet end. The top flow shroud is fixed to the end of the third moving ring near the outlet end. A flow guide shroud is fixed to the inner wall of the valve body near the outlet end, and the constricted end of the flow guide shroud is located inside the top flow shroud.

[0011] In one embodiment of this utility model, flange joints are fixed to the outer ends of both the inlet and outlet ends. The inlet and outlet ends are connected to the pipeline via flange joints.

[0012] In one embodiment of this invention, multiple positioning blocks are fixed on the inner walls of both the inlet and outlet ends, and multiple positioning grooves adapted to the positioning blocks are carved on the side walls of each pair of filter screens. The filter screen is positioned by being engaged with the multiple positioning blocks through the multiple positioning grooves.

[0013] In one embodiment of this utility model, multiple elastic plates are fixed to the outer edge of each pair of filter screens, and each of the multiple elastic plates is fixed with a locking block. Multiple slots adapted to the locking blocks are carved into the inner sidewalls of both the inlet and outlet ends. The filter screens are secured in the inlet and outlet ends by the multiple locking blocks respectively within the multiple slots.

[0014] In one embodiment of this utility model, a pressure plate is fixed to the outer end of each of the plurality of elastic plates. The pressure plate is used to press the elastic plate to cause elastic deformation, thereby causing the card block to move out of the card slot.

[0015] In one embodiment of this utility model, the valve body includes a first valve body and a second valve body, which are connected by a flange. The fixing ring is fixed to the inner wall of the first valve body, and the top flow shroud is fixed to the second valve body. By configuring the valve body as a first valve body and a second valve body connected by a flange, it facilitates subsequent maintenance of the check valve mechanism within the valve body.

[0016] In one embodiment of this utility model, the outer walls of the first, second, and third moving rings, near the water outlet end, are all fixed with a misalignment strip. The inner walls of the fixed ring, the first moving ring, and the second moving ring, near the water outlet end, are all chiseled with misalignment grooves that fit the misalignment strips. The first, second, and third moving rings are engaged in the misalignment grooves by the misalignment strips, thereby improving the sealing performance between the fixed ring, the first moving ring, the second moving ring, and the third moving ring. Furthermore, by aligning the misalignment strips and misalignment grooves towards the water outlet end, the first, second, and third moving rings can only slide towards the side of the fixed ring near the water outlet end.

[0017] In one embodiment of this utility model, multiple sliding rods are fixed to one end of each of the multiple misaligned strips near the misaligned grooves, and multiple sliding grooves are carved into the inner walls of each of the multiple misaligned grooves. The multiple sliding rods slide within the multiple sliding grooves respectively. The first moving ring, the second moving ring, and the third moving ring slide within the multiple sliding grooves via the multiple sliding rods, thereby sliding relative to each other.

[0018] In one embodiment of this utility model, each of the multiple ends of the rings located outside the chute is fixed with a fixing head, and multiple limiting grooves corresponding to the fixing heads are carved on the fixing ring, the first moving ring, and the second moving ring. The first moving ring, the second moving ring, and the third moving ring are engaged in the multiple limiting grooves by the multiple fixing heads, thereby limiting the distance that the first moving ring, the second moving ring, and the third moving ring slide towards the water outlet.

[0019] In one embodiment of this utility model, a diverting ring is installed on the side wall of the first and second moving rings near the water inlet, and a diverting head is fixed on the side wall of the third moving ring near the water inlet. Both the diverting rings and the diverting head guide the water flow, allowing the water to flow out from the gaps between the fixed ring and the first moving ring, the first and second moving rings, and the second and third moving rings.

[0020] Compared with the prior art, the valve body of the check valve of this utility model is provided with multiple inner and outer fitted moving rings. When the flow is forward, the water flow pushes the multiple moving rings apart, allowing the water flow to pass through the gaps between the multiple moving rings. When the flow is reverse, the thrust of the water flow pushes the third moving ring, causing the multiple moving rings to close together, thereby achieving the effect of check valve. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a cross-sectional view of a check valve body according to an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the structure of the second valve body in one embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the filter screen in one embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of the check valve mechanism in one embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the check mechanism in another state according to one embodiment of the present invention;

[0027] Figure 6 This is a schematic diagram of the structure of the second moving ring in one embodiment of the present invention.

[0028] Explanation of key figure labels:

[0029] 1-Valve body, 101-First valve body, 102-Second valve body, 103-Inlet end, 104-Outlet end, 105-Filter screen, 106-Positioning block, 107-Positioning groove, 108-Elastic plate, 109-Clamping block, 110-Clamping groove, 111-Pressure plate, 2-Check mechanism, 201-Fixing ring, 202-First moving ring, 203-Second moving ring, 204-Third moving ring, 205-Top flow cover, 206-Flow guide cover, 207-Misalignment strip, 208-Misalignment groove, 209-Slide rod, 210-Fixing head, 211-Slide groove, 212-Limiting groove, 213-Diverting ring, 214-Diverting head. Detailed Implementation

[0030] To enable those skilled in the art to better understand the technical solutions in this disclosure, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this disclosure.

[0031] like Figures 1 to 6 As shown, a check valve body in one embodiment of the present invention includes: a valve body 1, a pair of filter screens 105 and a check mechanism 2.

[0032] like Figures 1 to 6 As shown, the valve body 1 has an inlet end 103 and an outlet end 104 at its two ends. A pair of filter screens 105 are installed in the inlet end 103 and the outlet end 104 respectively. Check mechanism 2 is installed inside valve body 1. Check mechanism 2 includes: fixed ring 201 and top flow cover 205. Fixed ring 201 is fixed to the inner wall of valve body 1. A first moving ring 202, a second moving ring 203 and a third moving ring 204 are arranged sequentially from the outside to the inside of fixed ring 201. The first moving ring 202 slides on the inner wall of fixed ring 201, the second moving ring 203 slides on the inner wall of the first moving ring 202, and the third moving ring 204 slides on the inner wall of the second moving ring 203. The first moving ring 202, the second moving ring 203 and the third moving ring 204 are all slidably arranged towards the water outlet 104. Top flow cover 205 is fixed to the end of the third moving ring 204 near the water outlet 104. A guide hood 206 is fixed on the inner wall of the end of valve body 1 near the water outlet 104, and the constricted end of the guide hood 206 is located inside the top flow cover 205.

[0033] The inlet end 103 and the outlet end 104 are used to connect the inlet pipe and the outlet pipe, respectively. A pair of filter screens 105 both serve to filter and prevent impurities from entering the valve body 1. In use, when water flows from the inlet end 103 to the outlet end 104, the thrust of the water flow pushes the first moving ring 202, the second moving ring 203, and the third moving ring 204 to slide towards the outlet end 104, causing the first moving ring 202, the second moving ring 203, and the third moving ring 204 to be misaligned with each other. Then, the water flows through the gap between the misaligned first moving ring 202, the second moving ring 203, and the third moving ring 204 to one end of the outlet end 104. When backflow occurs, the water flows from the outlet 104 into the guide shroud 206, and is guided by the guide shroud 206 to impact the top flow shroud 205, pushing the top flow shroud 205 towards the inlet 103. The top flow shroud 205 pushes the first moving ring 202, the second moving ring 203 and the third moving ring 204 to close on the fixed ring 201, thereby achieving the effect of preventing backflow.

[0034] like Figures 1 to 6As shown, flange joints are fixed to the outer ends of both the inlet end 103 and the outlet end 104. The inlet end 103 and the outlet end 104 are connected to the pipeline via flange joints. Multiple positioning blocks 106 are fixed to the inner walls of both the inlet end 103 and the outlet end 104. Multiple positioning grooves 107, which are adapted to the positioning blocks 106, are carved into the side walls of each pair of filter screens 105. The filter screens 105 are positioned by being engaged with the positioning blocks 106 via the multiple positioning grooves 107.

[0035] like Figures 1 to 6 As shown, multiple elastic plates 108 are fixed to the outer edge of each pair of filter screens 105, and each elastic plate 108 is fixed with a locking block 109. Multiple slots 110 adapted to the locking blocks 109 are carved into the inner sidewalls of the water inlet end 103 and the water outlet end 104. The filter screen 105 is respectively locked into the multiple slots 110 by the multiple locking blocks 109, thereby securing the filter screen 105 in the water inlet end 103 and the water outlet end 104. Pressure plates 111 are fixed to the outer ends of the multiple elastic plates 108. The pressure plates 111 press the elastic plates 108 to cause elastic deformation, thereby causing the locking blocks 109 to move out of the slots 110.

[0036] like Figures 1 to 6 As shown, valve body 1 includes a first valve body 101 and a second valve body 102, which are connected by a flange. A retaining ring 201 is fixed to the inner wall of the first valve body 101, and a top flow cover 205 is fixed inside the second valve body 102. By setting valve body 1 as a first valve body 101 and a second valve body 102 connected by a flange, it is convenient to perform subsequent maintenance on the check mechanism 2 inside valve body 1.

[0037] like Figures 1 to 6 As shown, the outer walls of the first moving ring 202, the second moving ring 203, and the third moving ring 204, near the outlet end 104, are all fixed with misalignment strips 207. The inner walls of the fixed ring 201, the first moving ring 202, and the second moving ring 203, near the outlet end 104, are all chiseled with misalignment grooves 208 that fit the misalignment strips 207. The first moving ring 202, the second moving ring 203, and the third moving ring 204 are engaged in the misalignment grooves 208 by the misalignment strips 207, thereby improving the sealing performance between the fixed ring 201, the first moving ring 202, the second moving ring 203, and the third moving ring 204. Furthermore, by aligning the misalignment strips 207 and the misalignment grooves 208 towards the outlet end 104, the first moving ring 202, the second moving ring 203, and the third moving ring 204 can only slide towards the side of the fixed ring 201 near the outlet end 104.

[0038] like Figures 1 to 6As shown, multiple sliding rods 209 are fixed to one end of each of the multiple misaligned strips 207 near the misaligned grooves 208. Multiple sliding grooves 211 are carved into the inner wall of each of the multiple misaligned grooves 208, and the multiple sliding rods 209 slide within the multiple sliding grooves 211 respectively. The first moving ring 202, the second moving ring 203, and the third moving ring 204 slide within the multiple sliding grooves 211 via the multiple sliding rods 209, thus sliding relative to each other.

[0039] like Figures 1 to 6 As shown, each of the multiple rings 219 located outside the slide groove 211 has a fixed head 210 at one end, and multiple limiting grooves 212 corresponding to the fixed heads 210 are carved on the fixed ring 201, the first moving ring 202, and the second moving ring 203. The first moving ring 202, the second moving ring 203, and the third moving ring 204 are engaged in the multiple limiting grooves 212 by the multiple fixed heads 210, thereby limiting the distance that the first moving ring 202, the second moving ring 203, and the third moving ring 204 slide towards the water outlet 104.

[0040] like Figures 1 to 6 As shown, a diverting ring 213 is installed on the side wall of the first moving ring 202 and the second moving ring 203 near the water inlet 103, and a diverting head 214 is fixed on the side wall of the third moving ring 204 near the water inlet 103. Both the diverting ring 213 and the diverting head 214 guide the water flow, allowing the water to flow out from the gaps between the fixed ring 201 and the first moving ring 202, the first moving ring 202 and the second moving ring 203, and the second moving ring 203 and the third moving ring 204.

[0041] Working principle: When in use, as water flows from the inlet end 103 to the outlet end 104, the thrust of the water flow pushes the first moving ring 202, the second moving ring 203, and the third moving ring 204 to slide towards the outlet end 104, causing the first moving ring 202, the second moving ring 203, and the third moving ring 204 to be misaligned with each other. Subsequently, the water flow is diverted by the diversion ring 213 and the diversion head 214 on the first moving ring 202, the second moving ring 203, and the third moving ring 204, causing the water flow to flow to one end of the outlet end 104 through the gap between the misaligned first moving ring 202, the second moving ring 203, and the third moving ring 204.

[0042] When backflow occurs, the water flows from the outlet 104 into the guide shroud 206, and is guided by the guide shroud 206 to impact the top shroud 205, pushing the top shroud 205 towards the inlet 103. The top shroud 205 pushes the first moving ring 202, the second moving ring 203 and the third moving ring 204 to close on the fixed ring 201, thereby achieving the backflow prevention effect.

[0043] It will be apparent to those skilled in the art that this disclosure is not limited to the details of the exemplary embodiments described above, and that this disclosure can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of this disclosure is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this disclosure. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0044] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A check valve body, characterized in that, include: The valve body has an inlet end and an outlet end respectively at both ends; A pair of filter screens are installed in the water inlet and water outlet respectively; and A check mechanism is installed inside the valve body. The check mechanism includes a fixed ring and a top flow shroud. The fixed ring is fixed to the inner wall of the valve body. A first moving ring, a second moving ring, and a third moving ring are arranged sequentially from the outside to the inside of the fixed ring. The first moving ring slides on the inner wall of the fixed ring, the second moving ring slides on the inner wall of the first moving ring, and the third moving ring slides on the inner wall of the second moving ring. The first, second, and third moving rings are all slidably arranged towards the water outlet end. The top flow shroud is fixed to the end of the third moving ring near the water outlet end. A flow guide shroud is fixed to the inner wall of the valve body near the water outlet end, and the constricted end of the flow guide shroud is located inside the top flow shroud.

2. The check valve body according to claim 1, characterized in that, Both the inlet and outlet ends are fixed with flange joints.

3. The check valve body according to claim 1, characterized in that, Multiple positioning blocks are fixed on the inner walls of both the inlet and outlet ends, and multiple positioning grooves adapted to the positioning blocks are carved on the side walls of each pair of filter screens.

4. The check valve body according to claim 3, characterized in that, Multiple elastic plates are fixed to the outer edge of each pair of filter screens, and each of the multiple elastic plates is fixed with a locking block. Multiple slots that match the locking blocks are carved on the inner sidewalls of the water inlet and water outlet.

5. The check valve body according to claim 4, characterized in that, Each of the elastic plates has a pressure plate fixed to its outer end.

6. The check valve body according to claim 1, characterized in that, The valve body includes a first valve body and a second valve body, which are connected by a flange. The fixing ring is fixed to the inner wall of the first valve body, and the top flow cover is fixed to the second valve body.

7. The check valve body according to claim 1, characterized in that, The first, second, and third moving rings each have a misalignment strip fixed to their outer walls near the water outlet end. The fixed ring, the first moving ring, and the second moving ring each have a misalignment groove cut into their inner walls near the water outlet end to match the misalignment strip.

8. A check valve body according to claim 7, characterized in that, Each of the multiple misaligned strips has a plurality of sliding rods fixed to one end near the misaligned groove, and each of the multiple misaligned grooves has a plurality of sliding grooves carved on its inner wall, and the plurality of sliding rods slide in the plurality of sliding grooves respectively.

9. A check valve body according to claim 8, characterized in that, Each of the multiple ends of the slide groove is fixed with a fixing head, and the fixing ring, the first moving ring and the second moving ring are each chiseled with multiple limiting grooves corresponding to the fixing heads.

10. A check valve body according to claim 1, characterized in that, A diverter ring is installed on the side wall of the first and second moving rings near the water inlet, and a diverter head is fixed on the side wall of the third moving ring near the water inlet.

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