High-pressure gate valve shell sealing performance detection device

Abstract

The invention discloses a high-pressure gate valve shell sealing performance detection device, and relates to the technical field of gate valve shell sealing performance detection. The high-pressure gate valve shell sealing performance detection device comprises a support, a groove box fixedly connected to the upper portion of the support and a supporting plate fixedly connected to the upper end face of the groove box through a connecting frame, a bearing plate is jointly installed between the supporting plate and the groove box through a lifting part, and a plurality of bearing seats are fixedly connected to the bearing plate at equal intervals; the multi-stage plugging piece is used for performing multiple butt joint on the port of the gate valve shell so as to improve the plugging and sealing strength of the gate valve shell, the sealing detection mechanism is used for synchronously transmitting the plugging top pressure to the adjacent port of the gate valve shell in a concentrated mode, and a concentrated and stable plugging system is formed; and multiple sealing is realized from the inner cavity of the port of the shell and the outside in the multi-stage plugging piece, so that the plugging strength and the sealing tightness are improved, the misjudgment of air leakage caused by untight plugging is effectively avoided, and the accuracy and the reliability of a detection result are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of gate valve housing sealing detection, and specifically to a high-pressure gate valve housing sealing detection device. Background Art

[0002] The high-pressure gate valve housing is the most core component of a high-pressure gate valve, mainly serving to bear the internal high-pressure fluid, connect other components (such as valve covers, valve stems, and sealing components), and ensure the overall structural strength. The housing needs to have extremely high mechanical strength and good corrosion resistance, and is usually made of high-strength carbon steel, stainless steel, or alloy steel. To meet the working requirements under high-pressure conditions, the overall shape of the high-pressure gate valve housing is mostly designed as a T-shaped structure. This design not only facilitates the direct flow of fluid but also effectively enhances the uniform stress distribution of the housing, improving the overall compressive capacity.

[0003] Since the high-pressure gate valve housing directly bears the high pressure of the working medium, once there are casting defects, cracks, or other minor leakage points in the housing, it will directly affect the safe operation of the valve and even the entire pipeline system. Therefore, it is very necessary to conduct a sealing detection on the high-pressure gate valve housing. The main purpose of the sealing detection is to ensure that the housing itself has no leakage and no structural damage under the designed working pressure and even higher pressures, thereby ensuring good reliability and safety of the valve during use. At the same time, it is also one of the important links in factory quality control.

[0004] Currently, the common sealing detection method usually adopts a gas pressurization detection process. The operation process is roughly as follows: First, use special equipment to block both ends of the gate valve housing, and then introduce gas into the housing through a pressurization system. After maintaining a certain pressure, observe whether there is leakage by submerging it in a water tank or spraying soapy water, etc., to judge the sealing performance of the housing. When the existing detection equipment simultaneously conducts sealing detection on multiple high-pressure gate valve housings, it generally uses a cylinder to directly drive the plug to move to the gate valve port for simple top-touch plugging. The top-touch forces of each plug are independent of each other, resulting in the pressure applied by each plug being easily dispersed during the plugging process and unable to form a unified and uniform plugging force well.

[0005] In addition, the plug only simply touches the port of the gate valve housing and does not form an effective seal. The plugging method is relatively single. When introducing gas into the gate valve housing for sealing detection later, it is very easy to have air leakage due to the poor seal between the plug and the gate valve housing, thus affecting the accuracy of the detection data. This air leakage problem is often misjudged as a leakage in the housing itself, resulting in incorrect detection results and unable to accurately and effectively reflect the true sealing performance of the gate valve housing itself, reducing the reliability and effectiveness of the detection. Summary of the Invention

[0006] The present invention provides a sealing performance detection device for a high-pressure gate valve housing, which solves the technical problems that when the existing detection equipment simultaneously performs sealing detection on multiple high-pressure gate valve housings, a plugging head driven by a cylinder alone is usually used for simple top-touch plugging. The plugging heads are independently stressed and the pressure is dispersed, making it difficult to form an overall uniform sealing force. At the same time, the plugging method is single, only end top-touch, resulting in poor sealing effect. After the gas is introduced, it is easy to leak air at the plugging part, leading to inaccurate detection results and even misjudging the leakage of the housing, thus affecting the authenticity and effectiveness of the detection.

[0007] A sealing performance detection device for a high-pressure gate valve housing provided by the present invention includes a bracket, a tank box fixedly connected to the upper part of the bracket, and a support plate fixedly connected to the upper end face of the tank box through a connecting frame. A bearing plate is jointly installed between the support plate and the tank box through a lifting part. A plurality of bearing seats are fixedly connected to the bearing plate at equal intervals. The upper end face of each bearing seat is fixedly connected with a placement seat with a T-shaped groove opened at the upper part for placing the gate valve housing. A sealing detection mechanism is jointly arranged on the bearing seats for simultaneously pressing against the ends of a plurality of equally spaced gate valve housings to plug them for sealing detection. The sealing detection mechanism includes a push plate slidably installed on the placement seat through a pushing member, a plurality of docking components respectively slidably arranged on the bearing seats and passing through the push plate for filling air into the gate valve housing, and a plurality of plugging components respectively installed between the push plate and the bearing seats for plugging the left and right ends of the gate valve housing. The plugging component includes two link rods symmetrically hinged to the front end face of the push plate on the left and right, and two multi-stage plugging members symmetrically slidably connected to the upper end face of the bearing seat through sliding members. The front end of the link rod is hinged to the corresponding multi-stage plugging member. The multi-stage plugging member is used for multiple butt joints of the port of the gate valve housing to improve the plugging and sealing strength of the gate valve housing.

[0008] In a possible implementation manner, the multi-stage plugging member includes a sliding cylinder installed on the sliding member and a plug head slidably connected in the sliding cylinder for inserting into the port of the gate valve housing. A first top spring is fixedly connected between the plug head and the sliding cylinder. The plug head is composed of a disc-shaped structure and a columnar structure fixedly connected to the center of the side of the disc-shaped end. An elastic sealing ring is fixedly connected to the inner wall of the sliding cylinder in an embedded manner.

[0009] In a possible implementation manner, an annular groove is opened on the outer wall of the columnar section of the plug head, and an annular airbag is fixedly sleeved outside the annular groove. A plurality of L-shaped push rods are circumferentially and equally spaced and slidably connected through the disc section of the plug head. The ends of the L-shaped push rods close to the annular airbag are fixedly connected with a push ring together, and the ends of the L-shaped push rods far from the push ring are fixedly connected to the inner wall of the sliding cylinder.

[0010] In a possible implementation, the sliding member includes two chute groups symmetrically arranged left and right on the upper end surface of the bearing seat. Slide blocks are slidably connected to the chute groups, and the sliding cylinder is fixedly connected to the upper part of the slide blocks.

[0011] In a possible implementation, the lifting part includes a cylinder I fixedly connected to the support plate by embedding and two slide bars symmetrically fixed left and right between the support plate and the bottom of the groove box cavity. And there are two rows of slide bars symmetrically arranged front and back. The bearing plate is sleeved and slidably connected to the outside of the four slide bars. A portal frame is fixedly connected to the upper end surface of the bearing plate, and the telescopic end of the cylinder I is fixedly connected to the upper end surface of the transverse section of the portal frame.

[0012] In a possible implementation, the docking assembly includes a communicating pipe slidably connected through the bearing seat. A pressure sensor is arranged at the end of the communicating pipe. A connecting ring is fixedly connected to the front part of the outer wall of the communicating pipe. A push plate is slidably sleeved on the outside of the communicating pipe, and a limiting spring is fixedly connected between the push plate and the connecting ring.

[0013] In a possible implementation, clamping parts for limiting the valve housing placed are arranged in the three branch sections of the T-shaped inner cavity of the placing seat. The clamping parts include two mounting grooves symmetrically arranged in the inner cavity of the placing seat. Slide plates are slidably connected in the mounting grooves. A second top spring is fixedly connected between the slide plates and the mounting grooves. Arc-shaped clamping plates are fixedly connected to the opposite sides of the two slide plates. An inclined surface for guiding is arranged on the upper part of the arc-shaped clamping plate.

[0014] In a possible implementation, the pushing member includes a connecting plate fixedly connected to the upper end surface of the push plate and a cylinder II fixedly connected to the upper end surface of the middle bearing seat through a fixing block. The telescopic end of the cylinder II is fixedly connected to the rear end surface of the connecting plate.

[0015] In a possible implementation, the rear ends of the communicating pipes are commonly communicated with a flexible manifold. A flexible input pipe is embedded in the rear wall plate of the groove box, and the lower end of the flexible input pipe is communicated with the flexible manifold.

[0016] In a possible implementation, a return spring is fixedly connected between the connecting rod and the push plate. The two connecting rods in the plugging assembly are inclined to gradually approach each other in the direction from back to front.

[0017] From the above technical solutions, it can be seen that the present invention has the following advantages:

[0018] In the present invention, through the coordinated cooperation of the push plate and the link rods distributed in a V-shape in each plugging component, the top pressure of the push plate is transmitted to the multi-stage plugging members in the left-right direction, prompting each multi-stage plugging member to approach synchronously along the same horizontal line direction. Furthermore, when each multi-stage plugging member contacts the port of the gate valve housing, the applied top contact force is maintained on the same force line, and the top pressures can cooperate with each other and concentrate, thereby forming a whole uniform and stable plugging system, improving the plugging strength at the housing port.

[0019] In the present invention, through the mutual cooperation of the sliding cylinder, elastic sealing ring, annular airbag and push ring in the multi-stage plugging member, multiple pluggings are respectively carried out from the inner cavity and the outside of the port of the gate valve housing, significantly improving the sealing tightness of the gate valve housing, avoiding the problem of misjudging the housing leakage due to insufficient plugging in the traditional structure, and improving the accuracy and reliability of the detection result.

[0020] The air pressure change monitored by the pressure sensor is combined with whether bubbles appear in the water of the housing to judge the sealing performance of the housing. The two detection methods cooperate with each other to make the detection result more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0022] Figure 1 It is a schematic structural diagram of the high-pressure gate valve housing sealing detection device provided by the present invention.

[0023] Figure 2 It is a schematic cross-sectional structure diagram of the tank box provided by the present invention.

[0024] Figure 3 It is a schematic installation structure diagram of the sealing detection mechanism provided by the present invention.

[0025] Figure 4 Provided by the present invention Figure 3 The enlarged schematic diagram of the structure of part A in

[0026] Figure 5 It is a schematic rear-view perspective structure diagram of the sealing detection mechanism provided by the present invention.

[0027] Figure 6 It is a schematic cross-sectional structure diagram of the multi-stage plugging member provided by the present invention.

[0028] Figure 7 It is a schematic cross-sectional structure diagram of the side-view perspective of the placement seat provided by the present invention.

[0029] Figure 8 It is a shape diagram of the high-pressure gate valve housing for the operation object.

[0030] Among them, the above-mentioned drawings include the following reference numerals:

[0031] 1. Tank box; 2. Support plate; 3. Lifting part; 31. First cylinder; 32. Slide bar; 33. Gate-shaped frame; 4. Bearing plate; 5. Bearing seat; 6. Placing seat; 7. Sealing detection mechanism; 71. Pushing part; 711. Connecting plate; 712. Second cylinder; 72. Pushing plate; 73. Docking component; 731. Connecting pipe; 732. Connecting ring; 733. Limiting spring; 74. Connecting rod; 75. Sliding part; 751. Chute group; 752. Sliding block; 76. Multi-stage plugging part; 761. Slide cylinder; 762. Plug; 763. First top spring; 764. Elastic sealing ring; 765. Annular groove; 766. Annular airbag; 767. L-shaped push rod; 768. Pushing ring; 8. Installation groove; 9. Slide plate; 10. Arc-shaped clamping plate; 11. Flexible manifold; 12. Flexible input pipe. Detailed implementation manners

[0032] To make the above objects, features and advantages of the present invention more obvious and understandable, the following will describe the detailed implementation manners of the present invention with reference to the drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0033] Please refer to Figure 1 , Figure 2 and Figure 5 , the present invention provides a technical solution: a high-pressure gate valve housing sealing detection device, including a bracket, a tank box 1 fixedly connected to the upper part of the bracket, and a support plate 2 fixedly connected to the upper end surface of the tank box 1 through a connecting frame. A bearing plate 4 is jointly installed between the support plate 2 and the tank box 1 through a lifting part 3. A plurality of bearing seats 5 are fixedly connected at equal intervals on the bearing plate 4. The upper end surface of each bearing seat 5 is fixedly connected with a placing seat 6 with a T-shaped groove opened in the upper part for placing the gate valve housing. A sealing detection mechanism 7 is jointly arranged on the bearing seats 5 for simultaneously pressing against the ends of a plurality of equally spaced gate valve housings to block them so as to facilitate sealing detection. The lifting part 3 includes a first cylinder 31 fixedly connected to the support plate 2 by embedding and two slide bars 32 fixedly connected symmetrically left and right between the support plate 2 and the bottom of the tank box 1 cavity. And two rows of slide bars 32 are arranged symmetrically front and back. The bearing plate 4 is sleeved and slidably connected to the outside of the four slide bars 32. The upper end surface of the bearing plate 4 is fixedly connected with a gate-shaped frame 33. The telescopic end of the first cylinder 31 is fixedly connected to the upper end surface of the horizontal section of the gate-shaped frame 33.

[0034] Please refer to Figure 4 and Figure 7 In this embodiment, clamping portions for limiting the gate valve housing placed therein are provided in all three branch segments of the T-shaped inner cavity on the placement seat 6. The clamping portion includes two mounting grooves 8 symmetrically opened in the inner cavity of the placement seat 6. Slide plates 9 are slidably connected in the mounting grooves 8. A second top spring is fixedly connected between the slide plates 9 and the mounting grooves 8. An arc-shaped clamping plate 10 is fixedly connected to the opposite sides of the two slide plates 9. An inclined surface for guiding is provided in the upper part of the arc-shaped clamping plate 10.

[0035] Please refer to Figure 2 、 Figure 3 and Figure 4 The seal detection mechanism 7 includes a push plate 72 slidably mounted on the placement seat 6 through a pusher 71, a plurality of docking components 73 respectively slidably arranged on the bearing seat 5 and passing through the push plate 72 for filling air into the gate valve housing, and a plurality of blocking components respectively installed between the push plate 72 and the bearing seat 5 for blocking the left and right ends of the gate valve housing. The blocking component includes two connecting rods 74 symmetrically hinged to the front end face of the push plate 72 on the left and right, and two multi-stage blocking members 76 symmetrically slidably connected to the upper end face of the bearing seat 5 through sliding members 75 on the left and right. The front end of the connecting rod 74 is hinged to the corresponding multi-stage blocking member 76. The multi-stage blocking member 76 is used for multiple docking of the port of the gate valve housing to improve the blocking and sealing strength of the gate valve housing. A return spring is fixedly connected between the connecting rod 74 and the push plate 72. The two connecting rods 74 in the blocking component are gradually inclined towards each other from the rear to the front.

[0036] Please refer to Figure 3 and Figure 5 The pusher 71 includes a connecting plate 711 fixedly connected to the upper end face of the push plate 72 and a second cylinder 712 fixedly connected to the upper end face of the middle bearing seat 5 through a fixing block. The telescopic end of the second cylinder 712 is fixedly connected to the rear end face of the connecting plate 711.

[0037] Please refer to Figure 3 、 Figure 4 、 Figure 5 and Figure 7 The docking component 73 includes a communicating pipe 731 slidably penetrating and connected to the bearing seat 5. A connecting ring 732 is fixedly connected to the front part of the outer wall of the communicating pipe 731. The push plate 72 is slidably sleeved outside the communicating pipe 731. A limiting spring 733 is fixedly connected between the push plate 72 and the connecting ring 732. The rear ends of the communicating pipes 731 are commonly connected to a flexible manifold 11. A flexible input pipe 12 is embedded in the rear wall plate of the tank box 1. The lower end of the flexible input pipe 12 is connected to the flexible manifold 11.

[0038] Please refer to Figure 4, the sliding member 75 includes two chute groups 751 symmetrically arranged on the upper end surface of the bearing seat 5, and sliding blocks 752 are slidably connected to the chute groups 751.

[0039] First, water is introduced into the tank 1 until the water level reaches an appropriate position. Then, the gate valve housing (hereinafter referred to as the housing) is manually placed on the placement seat 6 in sequence, so that the shape of the housing is consistent with the inner cavity position of the shape of the placement seat 6T. The supporting section of the placed housing abuts against the inclined surface on the upper part of the arc-shaped clamping plate 10. Manually press the housing downward rhythmically. The housing squeezes the corresponding two arc-shaped clamping plates 10 to move away from each other through the inclined surface on the upper part of the arc-shaped clamping plate 10 until the housing completely moves downward into the placement seat 6. At this time, the second top spring indirectly pushes the arc-shaped clamping plate 10 to abut against the outer wall of the housing through the sliding plate 9, so as to ensure that the housing is stably placed in the placement seat 6.

[0040] Then, control the operation of the second cylinder 712 to push the connecting plate 711 forward. The connecting plate 711 then drives the push plate 72 to move forward. The push plate 72 then pushes the communicating pipe 731 forward through the limiting spring 733 and the connecting ring 732 until the communicating pipe 731 moves forward and abuts against the rear port of the housing. The communicating pipe 731 is sleeved on the outer wall of the rear section of the housing, and the rear port of the housing abuts against the front end side of the inner cavity of the communicating pipe 731. At this time, the communicating pipe 731 stops moving forward. The second cylinder 712 pushes the push plate 72 to continue moving forward, so that the limiting spring 733 is gradually compressed. During the continuous forward movement of the push plate 72, the connecting rod 74 is further pushed to move. Since the two corresponding connecting rods 74 of the connecting rod 74 are inclined towards the side close to each other from back to front, the connecting rod 74 will push the multi-stage plugging member 76 to drive the sliding block 752 to move. The sliding block 752 then moves along the path of the chute group 751, so that the corresponding two multi-stage plugging members 76 move closer to each other until the multi-stage plugging member 76 abuts against the left and right ports of the housing, and the left and right ports of the housing can be blocked.

[0041] Through the coordinated cooperation of the laterally adjacent connecting rods 74, the corresponding two connecting rods 74 distributed in a figure-eight shape transmit the top pressure of the push plate 72 to the multi-stage plugging members 76 in the left and right directions, prompting each multi-stage plugging member 76 to synchronously approach along the same horizontal line direction. Furthermore, when each multi-stage plugging member 76 contacts the port of the gate valve housing, the applied abutting force is maintained on the same force line, and the top pressures can cooperate with each other and concentrate, thereby forming a whole uniform and stable plugging system and improving the plugging strength at the housing port.

[0042] Next, control the operation of cylinder 1 (31) to push the gantry frame (33) downward. The gantry frame (33) then drives the bearing plate (4) to move downward along the slide rod (32). The bearing plate (4) further drives the housing to move downward through the bearing seat (5) and the placement seat (6), so that the housing moves downward and is immersed in the water in the tank (1). Subsequently, connect the flexible input pipe (12) to an external air pump, and pump air into the flexible input pipe (12) through the external air pump. The air then sequentially enters the housing through the flexible manifold (11) and the connecting pipe (731). By continuously pumping air into the housing for a period of time, the air pressure in the housing increases. Then, observe whether there are bubbles in the water around the housing to detect the sealing performance of the housing.

[0043] It should be noted that the air pressure in the housing is monitored in real time by a pressure sensor (not shown in the figure) provided at one end of the connecting pipe (731) facing the housing. The pressure sensor converts the sensed air pressure into an electrical signal, amplifies and modulates the electrical signal, and finally converts the electrical signal into a digital signal. The numerical result is displayed on an external display screen. When there are bubbles in the water around the housing, in addition to accurately observing the position of the leakage point on the housing, the air leakage amount can also be obtained through the change in the value of the pressure sensor. When there are no visible bubbles in the water around the housing, it indicates that there is no leakage point on the housing or the leakage point is very small and the leakage amount is extremely small. At this time, the value of the pressure sensor can be used to determine whether there is air leakage from the housing and the amount of the leakage.

[0044] After the sealing performance detection is completed, control the telescopic end of cylinder 1 (31) to contract, and drive the bearing plate (4) to move upward through the gantry frame (33). The bearing plate (4) then drives the housing to move upward to the water surface through the bearing seat (5) and the placement seat (6). Then, control the operation of cylinder 2 (712) to drive the push plate (72) to move backward. The push plate (72) then drives the connecting rod (74) to move backward, and drives the connecting pipe (731) to move backward through the limit spring (733) and the connecting ring (732). When the connecting rod (74) moves backward, it drives the multi-stage sealing member (76) to separate from the left and right ports of the housing. When the connecting pipe (731) moves backward, it separates from the port at the rear of the housing. Finally, manually grasp the detected housing and pull it upward to take it out.

[0045] Please refer to Figure 4 and Figure 6, in this embodiment, the multi-stage plugging member 76 includes a sliding cylinder 761 fixedly connected to the upper part of the sliding block 752 and a plug 762 slidably connected in the sliding cylinder 761 and used to be inserted into the port of the gate valve housing. A first top spring 763 is fixedly connected between the plug 762 and the sliding cylinder 761. The plug 762 is composed of a disc-shaped structure and a columnar structure fixedly connected to the center of the disc-shaped end side. An elastic sealing ring 764 is fixedly connected by inlaying on the inner wall of the sliding cylinder 761. An annular groove 765 is formed on the outer wall of the columnar section of the plug 762, and an annular airbag 766 is fixedly connected by sleeving outside the annular groove 765. A plurality of L-shaped push rods 767 are circumferentially and equidistantly penetrated and slidably connected on the disc section of the plug 762. One end of the L-shaped push rod 767 close to the annular airbag 766 is fixedly connected with a push ring 768, and the other end of the L-shaped push rod 767 far from the push ring 768 is fixedly connected to the inner wall of the sliding cylinder 761.

[0046] During the process of the push plate 72 pushing the connecting rod 74 to move forward, the connecting rod 74 further pushes the sliding cylinder 761 to move, so that the sliding cylinder 761 drives the sliding block 752 to move along the chute group 751. Then the sliding cylinder 761 drives the plug 762 to move synchronously through the first top spring 763. After the plug 762 moves a certain distance, its columnar section is inserted into the housing port until the disc section of the plug 762 abuts against the housing port, and the plug 762 stops moving. The sliding cylinder 761 continues to move, compressing the first top spring 763 to contract. The sliding cylinder 761 starts to move relative to the plug 762. The sliding cylinder 761 drives the push ring 768 to move closer to the annular airbag 766 through the L-shaped push rod 767. Then the push ring 768 presses against the annular airbag 766, and the annular airbag 766 is pressed to expand and bulge, and then tightly fits against the inner wall of the housing branch section to perform the first plugging on the housing port.

[0047] When the sliding cylinder 761 moves relative to the plug 762, it also drives the elastic sealing ring 764 to move synchronously. When the annular airbag 766 is pressed to expand, the elastic sealing ring 764 is driven to slide and sleeved outside the housing branch section, and the elastic sealing ring 764 tightly fits against the outer wall of the housing branch section by its own elasticity, so as to plug the housing again, greatly enhancing the sealing strength when plugging the housing.

[0048] During operation, first introduce water into the tank 1 to raise the water level to an appropriate position. Then place the gate valve housing on the placing seat 6 in sequence. Next, control the sealing detection mechanism 7 to operate to plug the port of the gate valve housing first, and then control the lifting part 3 to operate to drive the bearing plate 4 to move downward. The bearing plate 4 indirectly drives the gate valve housing to be immersed in water. Subsequently, introduce gas into the gate valve housing through the sealing detection mechanism 7. Whether there are bubbles in the water can be observed to detect the sealing performance of the gate valve housing. After the detection is completed, use the lifting part 3 to drive the bearing plate 4 to move upward. The bearing plate 4 indirectly drives the gate valve housing to be removed from the water. Then control the sealing detection mechanism 7 to separate from the gate valve housing. Finally, the detected gate valve housing can be manually taken out.

[0049] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation on the present invention.

[0050] In addition, the terms "first", "second", "No. 1", "No. 2" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", "No. 1", "No. 2" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0051] In the present invention, unless otherwise clearly specified and limited, the terms such as "mounted", "connected", "connected to", "fixed" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] The embodiments of the specific implementation manners are all preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A high-pressure gate valve housing sealing detection device, comprising a bracket, a tank box fixedly connected to the upper part of the bracket, and a support plate fixedly connected to the upper end face of the tank box through a connecting frame, characterized in that: A bearing plate is jointly installed between the support plate and the groove box through a lifting part. A number of bearing seats are fixedly connected to the bearing plate at equal intervals. The upper end surface of each bearing seat is fixedly connected with a placing seat with a T-shaped groove opened at the upper part for placing the gate valve housing. A sealing and detecting mechanism is jointly arranged on the bearing seats for simultaneously pressing against the ends of a plurality of equally spaced gate valve housings to block them so as to facilitate sealing detection; The sealing and detecting mechanism includes a push plate slidably installed on the placing seat through a pushing member, a number of docking components respectively slidably arranged on the bearing seats and penetrating through the push plate for filling air into the gate valve housing, and a number of blocking components respectively installed between the push plate and the bearing seats for blocking the left and right ends of the gate valve housing; The blocking component includes two link rods symmetrically hinged to the front end surface of the push plate on the left and right, and two multi-stage blocking members symmetrically slidably connected to the upper end surface of the bearing seat through sliding members on the left and right. The front end of the link rod is hinged to the corresponding multi-stage blocking member, and the multi-stage blocking member is used for multiple docking of the port of the gate valve housing to improve the blocking and sealing strength of the gate valve housing; 2. The hermeticity detection device for a high-pressure gate valve housing according to claim 1, characterized in that: The multi-stage blocking member includes a sliding cylinder installed on the sliding member and a plug head slidably connected in the sliding cylinder for inserting into the port of the gate valve housing. A first top spring is fixedly connected between the plug head and the sliding cylinder. The plug head is composed of a disc-shaped structure and a columnar structure fixedly connected to the center of the side of the disc-shaped end. An elastic sealing ring is fixedly connected to the inner wall of the sliding cylinder in an embedded manner.

3. The hermeticity detection device for a high-pressure gate valve housing according to claim 2, characterized in that: An annular groove is opened on the outer wall of the columnar section of the plug head, and an annular airbag is sleeved and fixedly connected outside the annular groove. A number of L-shaped push rods are circumferentially and equally spaced and slidably connected through the disc section of the plug head. A pushing ring is fixedly connected to the ends of the L-shaped push rods close to the annular airbag, and the ends of the L-shaped push rods far from the pushing ring are fixedly connected to the inner wall of the sliding cylinder.

4. The hermeticity detection device for a high-pressure gate valve housing according to claim 2, characterized in that: The sliding member includes two symmetrically arranged chute groups opened on the upper end surface of the bearing seat. A sliding block is slidably connected to each chute group, and the sliding cylinder is fixedly connected to the upper part of the sliding block.

5. The hermeticity detection device for a high-pressure gate valve housing according to claim 1, wherein: The lifting part includes a first cylinder fixedly connected to the support plate in an embedded manner and two sliding rods symmetrically fixedly connected between the support plate and the bottom of the groove box cavity. And two rows of the sliding rods are symmetrically arranged in the front and back. The bearing plate is sleeved and slidably connected outside the four sliding rods. A portal frame is fixedly connected to the upper end surface of the bearing plate, and the telescopic end of the first cylinder is fixedly connected to the upper end surface of the transverse section of the portal frame.

6. The hermeticity detection device for a high-pressure gate valve housing according to claim 1, characterized in that: The docking component includes a communicating pipe penetrating and slidably connected to the bearing seat. A connecting ring is fixedly connected to the front part of the outer wall of the communicating pipe. The push plate is slidably sleeved outside the communicating pipe, and a limiting spring is fixedly connected between the push plate and the connecting ring.

7. A high-pressure gate valve housing sealing performance detection device according to claim 1, characterized in that: Clamping parts for limiting the placed gate valve housing are arranged in all three branch sections of the T-shaped inner cavity of the placing seat. The clamping part includes two installation grooves symmetrically opened in the inner cavity of the placing seat. A sliding plate is slidably connected in each installation groove. A second top spring is fixedly connected between the sliding plate and the installation groove. An arc-shaped clamping plate is fixedly connected to the opposite sides of the two sliding plates. An inclined surface for guiding is opened on the upper part of the arc-shaped clamping plate.

8. A high-pressure gate valve housing sealing performance detection device according to claim 1, characterized in that: The pushing member includes a connecting plate fixedly connected to the upper end surface of the pushing plate and a second cylinder fixedly connected to the upper end surface of the bearing seat located in the middle through a fixing block, and the telescopic end of the second cylinder is fixedly connected to the rear end surface of the connecting plate.

9. The sealing performance detection device for a high-pressure gate valve housing according to claim 6, wherein: The rear ends of the communicating pipes are commonly communicated with a flexible manifold, and a flexible input pipe is embedded in the rear wall plate of the tank box, and the lower end of the flexible input pipe is communicated with the flexible manifold.

10. A high-pressure gate valve housing sealing performance detection device according to claim 1, characterized in that: A return spring is fixedly connected between the connecting rod and the pushing plate, and the two connecting rods in the plugging assembly are inclined to gradually approach each other in the direction from the rear to the front.

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