Back pressure valve pressure measuring device with sealing structure

Abstract

The utility model discloses a back pressure valve pressure measuring device with sealing structure relates to back pressure valve pressure measuring device technical field, the utility model discloses a support frame, and the abutment plate is slidably fitted in the support frame, and the side plate of support frame is equipped with the first placement groove, and the both sides of abutment plate all are fixed with guide rod, two respectively slide and fit in the sliding rod of support frame both sides, and the sliding rod swing cooperation is in the guide rod, and the one end of a sliding rod extension to support frame outside is rotatory cooperation with the rotatory board between the one end of its adjacent guide rod extension to support frame outside. The utility model discloses through abutment plate through the linear sliding in the support frame, and abutment plate drives both sides guide rod synchronous movement, and abutment plate is the linkage of guide rod, rotatory board, sliding rod and arc shaped backplate and provides power source, and the first placement groove provides the space of initial placement and pressure measurement for back pressure valve body, and after arc shaped backplate removes the support, and it is convenient for back pressure valve body to fall naturally under the action of gravity.

Description

Technical Field

[0001] This utility model belongs to the field of back pressure valve pressure measuring device, specifically, it relates to a back pressure valve pressure measuring device with a sealing structure. Background Technology

[0002] The back pressure valve operates through the force of a built-in spring: when the system pressure is lower than the set pressure, the diaphragm blocks the pipeline under the spring force; when the system pressure is higher than the set pressure, the diaphragm compresses the spring, the pipeline is opened, and liquid flows through the back pressure valve. The opening pressure of the back pressure valve is generally adjustable.

[0003] Patent application CN210400845U discloses a pressure testing fixture for a back pressure valve. Paragraph 0033 of the specification discloses that during pressure testing, the outlet pipe of the pressure testing water pump is threaded to the abutment plate, the back pressure valve is embedded in the groove, and the flange is placed between the support frame and the abutment plate. The abutment plate is clamped between the abutment plates using a clamping member, and the pressure testing water pump is connected to the water channel. The pressure test of the back pressure valve can then be performed without having to repeatedly disassemble and reassemble the flange by tightening multiple bolts and nuts, which is beneficial to improving the pressure testing efficiency.

[0004] In actual use, the back pressure valve body to be tested is installed into the groove of the connecting plate for positioning. The output end of the pressure testing water pump is connected to the water inlet of the back pressure valve body through a pipeline, and the connection is ensured to be sealed. The pressure testing water pump is started to perform a pressure test. After the test is completed, the pipeline connection is disconnected, the tested back pressure valve body is taken out of the groove, and a new back pressure valve body is installed for the next test. Since the back pressure valve body needs to be taken out of the groove for each test, the removal operation consumes extra time, which reduces the overall efficiency of the pressure test of the back pressure valve body.

[0005] To address this issue, a back pressure valve pressure measuring device with a sealed structure is proposed to solve the aforementioned drawbacks. Utility Model Content

[0006] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a back pressure valve pressure measuring device with a sealing structure, thereby solving the problems mentioned in the background art.

[0007] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows:

[0008] A back pressure valve pressure measuring device with a sealing structure includes a support frame, an abutment plate that slides inside the support frame, a first placement groove on the side plate of the support frame, and guide rods fixed on both sides of the abutment plate.

[0009] Two sliding rods are respectively slidably fitted on both sides of the support frame. The sliding rods are movably fitted inside the guide rod. A rotating plate is rotatably fitted between the end of one sliding rod extending outside the support frame and the end of the adjacent guide rod extending outside the support frame. Arc-shaped support plates are fixed on the opposite sides of the two sliding rods.

[0010] Optionally, the radial cross-section of the arc-shaped support plate is a quarter-circle structure, and the two arc-shaped support plates are symmetrically arranged along the axis of symmetry of the support frame, with the arc-shaped concave surfaces of the two arc-shaped support plates facing each other.

[0011] Optionally, the abutment plate has a hole on the side facing the first placement groove, the hole extends along the thickness direction of the abutment plate, a water channel communicating with the hole is formed in the abutment plate, the water channel extends along the height direction of the abutment plate, a threaded hole is formed on the support frame, the axis of the threaded hole is parallel to the sliding direction of the abutment plate, a threaded rod is threaded in the threaded hole, and a rotating disk is fixed at the first end of the threaded rod extending to the outside of the support frame.

[0012] Optionally, a limiting rod is fixed at the second end of the threaded rod. The limiting rod extends in a direction perpendicular to the axis of the threaded rod. A limiting groove is opened on the side of the abutment plate facing the threaded rod. The end of the limiting rod away from the threaded rod is rotatably engaged in the limiting groove. A second placement groove is opened on both sides of the first placement groove. A second guide groove is opened on both sides of the support frame and communicates with the second placement groove. The sliding rod is slidably engaged in the second guide groove and the second placement groove.

[0013] Optionally, the inner wall of the support frame is provided with two third guide grooves that communicate with the second guide groove. The two third guide grooves are symmetrically arranged along the axis of symmetry of the support frame. The guide rod is slidably engaged in the third guide groove. The opposite sides of the two guide rods are provided with first guide grooves, and the sliding rod is located in the first guide groove.

[0014] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art. Of course, any product implementing the present invention does not necessarily need to achieve all of the following advantages at the same time:

[0015] The support frame provides sliding space for the abutment plate and provides sliding guidance for the sliding rod. At the same time, the first placement slot in the support frame provides a placement area for the back pressure valve body. The abutment plate slides linearly within the support frame, and the abutment plate drives the guide rods on both sides to move synchronously. The abutment plate provides a power source for the linkage of the guide rod, rotating plate, sliding rod and arc-shaped support plate. The first placement slot provides space for the initial placement and pressure measurement of the back pressure valve body, and after the arc-shaped support plate is released from support, it is easy for the back pressure valve body to fall naturally under the action of gravity.

[0016] The guide rod is fixed to the abutment plate. The guide rod cooperates with the rotating plate and the sliding rod. The sliding rod slides in the support frame. The sliding rod drives the two arc-shaped support plates to approach or separate. The arc-shaped concave surface of the arc support plate is adapted to the back pressure valve body. When they are closed, they form a stable support and position the back pressure valve body during the pressure measurement process.

[0017] When the position of the threaded rod is adjusted by rotating the disc, the threaded rod rotates within the threaded hole of the support frame and moves along the axial direction. The limiting rod fixed at the second end of the threaded rod moves synchronously with the threaded rod, rotating within the limiting groove. The limiting rod, through the limiting groove, drives the abutment plate to move along the sliding direction within the support frame. The cooperation between the limiting rod and the limiting groove restricts the displacement of the abutment plate, ensuring that each step of the threaded rod movement drives a corresponding sliding amount of the abutment plate, further guaranteeing the adjustment of the support force of the arc-shaped support plate on the back pressure valve body.

[0018] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0019] The accompanying drawings described below are merely some embodiments. Those skilled in the art can obtain other drawings based on these drawings without any creative effort. In the drawings:

[0020] Figure 1 This is a schematic diagram of the three-dimensional structure;

[0021] Figure 2 This is a schematic diagram of the support frame structure;

[0022] Figure 3 Schematic diagram of cross-section structure Figure 1 ;

[0023] Figure 4 This is a schematic diagram of the abutment plate structure;

[0024] Figure 5 Schematic diagram of cross-section structure Figure 2 .

[0025] The attached diagram lists the components represented by each number as follows:

[0026] Support frame 1, first placement groove 2, threaded hole 3, threaded rod 4, rotating disk 5, abutment plate 6, water channel 7, hole 8, second placement groove 9, first guide groove 10, second guide groove 11, support leg 12, rubber pad 13, limiting groove 14, limiting rod 15, guide rod 16, third guide groove 17, sliding rod 18, arc-shaped support plate 19, rotating plate 20.

[0027] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings.

[0029] Please see Figure 1-5 As shown, this embodiment provides a back pressure valve pressure measuring device with a sealing structure, including a support frame 1, an abutment plate 6 that slides inside the support frame 1, a first placement groove 2 that is provided on the side plate of the support frame 1, and guide rods 16 that are fixed on both sides of the abutment plate 6.

[0030] Two sliding rods 18 are respectively slidably fitted on both sides of the support frame 1. The sliding rods 18 are movably fitted inside the guide rod 16. A rotating plate 20 is rotatably fitted between the end of one sliding rod 18 extending to the outside of the support frame 1 and the end of the adjacent guide rod 16 extending to the outside of the support frame 1. Arc-shaped support plates 19 are fixed on the opposite sides of the two sliding rods 18.

[0031] Initial adjustment: Position the abutment plate 6 within the support frame 1 away from the first placement slot 2. At this time, the guide rod 16 moves with the position of the abutment plate 6. The guide rod 16 drives the sliding rods 18 on both sides to gradually approach each other through the rotating plate 20. The two arc-shaped support plates 19 also approach each other. Place the back pressure valve body to be tested in the relevant area of ​​the first placement slot 2.

[0032] Support and fixation: Push the abutment plate 6 to slide in the support frame 1 towards the first placement groove 2. The guide rods 16 on both sides of the abutment plate 6 move synchronously. When the guide rods 16 move, the guide rods 16 drive the sliding rods 18 on both sides to slide closer to each other in the support frame 1 through the rotating plate 20. The two arc-shaped support plates 19 gradually close together as the sliding rods 18 move until the arc-shaped support plates 19 contact the back pressure valve body and form a stable support for the back pressure valve body.

[0033] Pressure testing: With the back pressure valve stably supported by the arc-shaped support plate 19, pressure testing of the back pressure valve body is carried out.

[0034] Remove the back pressure valve body: After the pressure test is completed, the staff pulls the abutment plate 6 to slide away from the first placement slot 2. The abutment plate 6 drives the guide rod 16 to move. The guide rod 16 drives the sliding rod 18 to move through the rotating plate 20. The two sliding rods 18 slide away from each other. The sliding rod 18 drives the arc-shaped support plate 19 to move and release the support on the back pressure valve body. The back pressure valve body falls from the first placement slot 2 under the action of gravity.

[0035] The support frame 1 provides sliding space for the abutment plate 6 and provides sliding guidance for the sliding rod 18. At the same time, the first placement groove 2 opened in the support frame 1 provides a placement area for the back pressure valve body. The abutment plate 6 slides linearly within the support frame 1, and the abutment plate 6 drives the guide rods 16 on both sides to move synchronously. The abutment plate 6 provides a power source for the linkage of the guide rod 16, the rotating plate 20, the sliding rod 18 and the arc-shaped support plate 19. The first placement groove 2 provides space for the initial placement and pressure measurement of the back pressure valve body, and after the arc-shaped support plate 19 is released from support, it facilitates the back pressure valve body to fall naturally under the action of gravity. The guide rod 16 is fixed on the abutment plate 6. The guide rod 16 cooperates with the rotating plate 20 and the sliding rod 18. The sliding rod 18 slides within the support frame 1 and drives the two arc-shaped support plates 19 to approach or separate. The arc-shaped concave surface of the arc-shaped support plate 19 is adapted to the back pressure valve body and forms a stable support when closed, positioning the back pressure valve body during the pressure measurement process.

[0036] In this embodiment, the radial cross-section of the arc-shaped support plate 19 is a quarter-circle structure. The two arc-shaped support plates 19 are symmetrically arranged along the axis of symmetry of the support frame 1, and the concave surfaces of the two arc-shaped support plates 19 face each other. The arc-shaped support plates 19 have a quarter-circle cross-section and the concave surfaces face each other. The arc-shaped support plates 19 can fit and conform to the outer periphery of the back pressure valve body. Combined with the symmetrical arrangement of the two arc-shaped support plates 19, the back pressure valve body is subjected to uniform force and is not easily deviated during pressure measurement.

[0037] In this embodiment, the abutment plate 6 has a hole 8 on the side facing the first placement groove 2. The hole 8 extends along the thickness direction of the abutment plate 6, and a water channel 7 connected to the hole 8 is formed inside the abutment plate 6, extending along the height direction of the abutment plate 6. During pressure testing, external pressure testing medium (such as water flow) is transported through the water channel 7 extending along the height direction inside the abutment plate 6. The medium flows through the hole 8, which is connected to the water channel 7 and extends along the thickness direction of the abutment plate 6, and is transmitted to the inside of the back pressure valve body, realizing the pressure test of the back pressure valve body. The hole 8 and the water channel 7 are connected to form a complete medium transmission path, so that the medium (such as water flow) can stably enter the back pressure valve body from the outside through the water channel 7 and the hole 8 during pressure testing, providing a reliable medium supply for the pressure test of the back pressure valve body. The hole 8 extends along the thickness direction of the abutment plate 6 and can be connected to the corresponding port of the back pressure valve body. The back pressure valve body, in conjunction with the abutment plate 6, reduces leakage of the pressure measuring medium and enhances the sealing effect. A sealing ring is installed on one side of the hole 8. The abutment plate 6 drives the sealing ring to move and abut against one side of the back pressure valve body to form a seal, thereby reducing the possibility of water leakage from the back pressure valve body during pressure testing.

[0038] In this embodiment, a threaded hole 3 is provided on the support frame 1. The axis of the threaded hole 3 is parallel to the sliding direction of the abutment plate 6. A threaded rod 4 is threaded into the threaded hole 3. A rotating disk 5 is fixed to the first end of the threaded rod 4 extending outside the support frame 1. When adjusting the position of the abutment plate 6, the operator rotates the rotating disk 5 fixed to the first end of the threaded rod 4. The rotating disk 5 drives the threaded rod 4 to rotate and move along its axis within the threaded hole 3 of the support frame 1. The movement of the threaded rod 4 pushes the abutment plate 6 closer to or further away from the first placement groove 2 within the support frame 1 along the sliding direction, thereby adjusting the position of the abutment plate 6. The rotating disk 5 increases the area of ​​force application for the hand, making it easier for the operator to rotate and facilitates the quick movement of the threaded rod 4 and the abutment plate 6. The operator can control the movement distance of the threaded rod 4 by rotating the rotating disk 5, thereby adjusting the position of the abutment plate 6.

[0039] In this embodiment, a limiting rod 15 is fixed to the second end of the threaded rod 4. The limiting rod 15 extends in a direction perpendicular to the axis of the threaded rod 4. A limiting groove 14 is opened on the side of the abutment plate 6 facing the threaded rod 4. The end of the limiting rod 15 away from the threaded rod 4 is rotatably fitted in the limiting groove 14. Two openings are opened on the limiting groove 14. Two positioning rods are fixed to the outer wall of the end of the limiting rod 15 near the limiting groove 14. The positioning rods on the limiting rod 15 are placed in the limiting groove 14 through the openings. When the position of the threaded rod 4 is adjusted by the rotating disk 5, the threaded rod 4 rotates in the threaded hole 3 of the support frame 1 and moves along the axial direction. The limiting rod 15 fixed to the second end of the threaded rod 4 moves synchronously with the threaded rod 4. The limiting rod 15 rotates in the limiting groove 14. The limiting rod 15 drives the abutment plate 6 to move in the sliding direction within the support frame 1 through the limiting groove 14. The cooperation between the limiting rod 15 and the limiting groove 14 restricts the displacement of the abutment plate 6, so that each step of the threaded rod 4 can drive the corresponding sliding amount of the abutment plate 6, further ensuring the adjustment of the support force of the arc-shaped support plate 19 on the back pressure valve body.

[0040] In this embodiment, the first placement groove 2 has second placement grooves 9 on both sides, and the support frame 1 has second guide grooves 10 on both sides that communicate with the second placement grooves 9. The sliding rod 18 is slidably engaged in the second guide grooves 10 and the second placement grooves 9. The inner wall of the support frame 1 has two third guide grooves 11 that communicate with the second guide grooves 10. The two third guide grooves 11 are symmetrically arranged along the axis of symmetry of the support frame 1. The guide rod 16 is slidably engaged in the third guide grooves 11. Two first fixing blocks are fixed at one end of the sliding rod 18 that extends to the outside of the support frame 1. A first through hole is opened on the opposite side of the two first fixing blocks. A first fixing rod that rotatably engages with the first through hole is fixed at the first end of the rotating plate 20. Two second fixing blocks are fixed at one end of the guide rod 16 that extends to the outside of the support frame 1. A second through hole is opened on the opposite side of the two second fixing blocks. A second fixing rod that rotatably engages with the second through hole is fixed at the second end of the rotating plate 20. When adjusting the position of the abutment plate 6 to support or release the back pressure valve, the abutment plate 6 drives the guide rods 16 on both sides to slide smoothly in the third guide groove 11 on the inner wall of the support frame 1 along the sliding direction. At the same time, the second fixing block extending from the outside of the support frame 1 through the second through hole is rotatably engaged with the second fixing rod at the second end of the rotating plate 20. The guide rod 16 drives the rotating plate 20 to rotate, and the first fixing rod at the first end of the rotating plate 20 is rotatably engaged with the first fixing block extending from the outside of the sliding rod 18 through the first through hole. This drives the sliding rod 18 to slide (closer or farther away) in the second guide groove 10 on both sides of the support frame 1 and the second placement groove 9 on both sides of the first placement groove 2, ultimately realizing the support or release of the back pressure valve by the arc-shaped support plate 19. The second guide groove 10 and the third guide groove 11 provide sliding paths for the sliding rod 18 and the guide rod 16 respectively, limiting their offset and making the sliding rod 18 and the guide rod 16 move smoothly in the preset direction, reducing the impact of shaking on the stability of the arc-shaped support plate 19 in supporting the back pressure valve body. The third guide groove 11 is symmetrically arranged along the axis of symmetry of the support frame 1. The two sliding rods 18 slide in the two second guide grooves 10 respectively, so that the guide rod 16 and the sliding rod 18 move synchronously and are subjected to balanced forces, making the support of the arc-shaped support plate 19 for the back pressure valve more stable and reducing the displacement of the back pressure valve body caused by uneven force.

[0041] In this embodiment, each of the two guide rods 16 has a first guide groove 17 on its opposite side, and the sliding rod 18 is located in the first guide groove 17. When the abutment plate 6 drives the guide rod 16 to move along the sliding direction, the guide rod 16 drives the sliding rod 18 to slide (closer or farther away) in the second guide groove 10 and the second placement groove 9 of the support frame 1 through the rotating plate 20. At this time, the sliding rod 18 slides synchronously in the first guide groove 17 on the opposite side of the guide rod 16. The first guide groove 17 constrains the movement direction of the sliding rod 18, so that the sliding rod 18 moves smoothly along a preset trajectory, thereby driving the arc-shaped support plate 19 to complete the support or release action of the back pressure valve. The first guide groove 17 provides a sliding constraint for the sliding rod 18. The sliding rod 18 cooperates with the second guide groove 10 of the support frame 1 to double restrict the movement direction of the sliding rod 18, reduce the deviation or shaking of the sliding rod 18 during the movement, make the movement trajectory of the sliding rod 18 driving the arc-shaped support plate 19 more accurate, and improve the stability of the support for the back pressure valve body. The sliding rod 18 slides within the first guide groove 17, making the relative movement of the guide rod 16 and the sliding rod 18 smoother and reducing the jamming caused by misalignment between the two.

[0042] In this embodiment, the support frame 1 has multiple support legs 12 fixed to its bottom, and a rubber pad 13 is placed on the bottom of the support frame 1. When the support frame 1 is placed on the working plane, the multiple support legs 12 at the bottom of the support frame 1 support the entire device, maintaining a certain distance between the support frame 1 and the working plane, while the rubber pad 13 at the bottom of the support frame 1 contacts the working plane. The support legs 12 provide stable support for the support frame 1, raising the distance between the bottom of the support frame 1 and the working plane. This facilitates the natural fall and removal of the back pressure valve body after pressure measurement, and reduces wear caused by direct contact between the support frame 1 and the working plane. The rubber pad 13 reduces the risk of damage to the back pressure valve body during its fall.

[0043] Working principle:

[0044] Initial adjustment: The staff first rotates the rotating disk 5. The rotating disk 5 drives the threaded rod 4 to rotate in the threaded hole 3 and move outward from the support frame 1. The threaded rod 4 drives the limiting rod 15 to pull the abutment plate 6 to a position in the support frame 1 away from the first placement groove 2. At this time, the guide rod 16 moves with the abutment plate 6. The guide rod 16 drives the sliding rods 18 on both sides to move closer to each other through the rotating plate 20. The sliding rods 18 drive the arc-shaped support plate 19 to move. The two arc-shaped support plates 19 move closer to each other to form a placement space.

[0045] Placement and support fixation: Place the back pressure valve body to be tested into the first placement groove 2 area; rotate the rotating disk 5 in the opposite direction, so that the threaded rod 4 pushes the abutment plate 6 to slide towards the first placement groove 2, the guide rod 16 moves synchronously and drives the sliding rod 18 to move closer to each other through the rotating plate 20, and the arc-shaped support plate 19 gradually closes and fits against the back pressure valve body to form a stable support.

[0046] Pressure testing: The external pressure testing medium (such as water flow) is connected to the water channel 7 of the abutment plate 6. The medium is transmitted to the back pressure valve body through the water channel 7 and the hole 8. The sealing is achieved by the fit between the hole 8 and the back pressure valve body port and the pressing action of the abutment plate 6, and the pressure test is carried out.

[0047] Remove the back pressure valve body: After the pressure test is completed, the operator rotates the rotating disk 5 to make the abutment plate 6 slide away from the first placement slot 2. The guide rod 16 drives the sliding rod 18 away from each other through the rotating plate 20. The arc-shaped support plate 19 is released from support. Under the action of gravity, the back pressure valve body falls from the first placement slot 2 onto the rubber pad 13, completing the removal of the part.

[0048] This utility model is not limited to the above-described embodiments. Anyone should know that structural changes made under the guidance of this utility model, and any technical solutions that are the same as or similar to this utility model, fall within the protection scope of this utility model. Technical aspects, shapes, and structures not described in detail in this utility model are all publicly known technologies.

Claims

1. A back pressure valve pressure measuring device having a seal structure, characterized by, include: Support frame (1), with a sliding fit of abutment plate (6) inside the support frame (1), and a first placement groove (2) is provided on the side plate of the support frame (1), and guide rods (16) are fixed on both sides of the abutment plate (6). Two sliding rods (18) are respectively slidably fitted on both sides of the support frame (1). The sliding rods (18) are movably fitted inside the guide rod (16). A rotating plate (20) is rotatably fitted between the end of one sliding rod (18) extending to the outside of the support frame (1) and the end of the adjacent guide rod (16) extending to the outside of the support frame (1). An arc-shaped support plate (19) is fixed on the opposite side of the two sliding rods (18).

2. The back pressure valve pressure measurement device with a sealing structure according to claim 1, characterized in that, The radial cross section of the arc-shaped support plate (19) is a quarter circle structure. The two arc-shaped support plates (19) are symmetrically arranged along the axis of symmetry of the support frame (1), and the arc-shaped concave surfaces of the two arc-shaped support plates (19) are opposite to each other.

3. The back pressure valve pressure measurement device with a sealing structure according to claim 1, characterized in that, The abutment plate (6) has a hole (8) on one side facing the first placement groove (2). The hole (8) extends along the thickness direction of the abutment plate (6). A water channel (7) connected to the hole (8) is provided in the abutment plate (6). The water channel (7) extends along the height direction of the abutment plate (6).

4. The back pressure valve pressure measuring device with a sealing structure according to claim 1, characterized in that, A threaded hole (3) is provided on the support frame (1). The axis of the threaded hole (3) is parallel to the sliding direction of the abutment plate (6). A threaded rod (4) is threaded inside the threaded hole (3). A rotating disk (5) is fixed at the first end of the threaded rod (4) extending to the outside of the support frame (1).

5. A back pressure valve pressure measuring device with a sealing structure according to claim 4, characterized in that, The second end of the threaded rod (4) is fixed with a limiting rod (15). The limiting rod (15) extends in a direction perpendicular to the axis of the threaded rod (4). The abutment plate (6) has a limiting groove (14) on the side facing the threaded rod (4). The end of the limiting rod (15) away from the threaded rod (4) is rotatably fitted in the limiting groove (14).

6. The back pressure valve pressure measuring device with a sealing structure according to claim 1, characterized in that, The first placement slot (2) has a second placement slot (9) on both sides, and the support frame (1) has a second guide slot (10) on both sides that is connected to the second placement slot (9). The sliding rod (18) slides in the second guide slot (10) and the second placement slot (9).

7. A back pressure valve pressure measuring device with a sealing structure according to claim 6, characterized in that, The inner wall of the support frame (1) is provided with two third guide grooves (11) that are connected to the second guide groove (10). The two third guide grooves (11) are symmetrically arranged along the axis of symmetry of the support frame (1), and the guide rod (16) is slidably fitted in the third guide groove (11).

8. A back pressure valve pressure measuring device with a sealing structure according to claim 1, characterized in that, The two guide rods (16) are provided with a first guide groove (17) on opposite sides, and the sliding rod (18) is located in the first guide groove (17).

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