Buffer type pressure regulating device applied to gas piston type pressure gauge

Abstract

The utility model discloses a buffer type pressure regulating device applied to a gas piston type pressure gauge, which comprises a lead screw, a rotating shaft is sleeved on the outer wall of one end of the lead screw, a slotted drum is sleeved on the outer wall of the other end of the lead screw, and a deep groove ball bearing a and a deep groove ball bearing b are sleeved on the outer wall of one end of the rotating shaft close to the slotted drum. The end, close to the rotating shaft, of the grooving barrel is connected with a fixing ring in a clamped mode, the end, away from the rotating shaft, of the lead screw is fixedly connected with a pump piston, the outer wall of the pump piston is sleeved with a pump air cylinder, the grooving barrel is connected with the pump air cylinder through a connecting sleeve, and the end, away from the lead screw, of the pump air cylinder is provided with a rear cover which is connected with a pipeline. A lead screw step groove is vertically formed in the lead screw, a limiting sliding ring is arranged in the lead screw step groove, and a limiting blocking rod is arranged in the limiting sliding ring. The buffer type pressure regulating device applied to the gas piston type pressure gauge solves the problems that a compressible pressure storage cavity of an existing pressure regulating device is relatively small, and the pressure control precision is low.

Description

Technical Field

[0001] The utility model belongs to the technical field of pressure regulating devices, in particular to a buffer type pressure regulating device applied to a gas piston type pressure gauge. Background Art

[0002] Positive and negative pressure gas piston pressure gauges are measuring devices used to measure vacuum and micro pressures. The range is set to (-100 ~ +600) kPa. In order to quickly increase the pressure, the piston diameter of the conventional high-pressure regulating system is relatively small. The entire compressible pressure storage chamber is relatively small, and the pressure control accuracy is low. It usually takes 2-3 turns of the pressure regulator to transmit the pressure to the piston system. It takes 1-2 minutes to stabilize the pressure at one point, which seriously slows down work efficiency.

[0003] To address the above issues, the present invention provides a buffered pressure-regulating device with a simple design and easy maintenance. By enlarging the pressure storage chamber and adding a bearing at the front end to reduce friction, the device achieves rapid response and high-precision pressure control. During the pressure gauge's pressure regulation process, the rotation of the pressure regulator precisely controls minute changes in pressure, allowing pressure to be quickly and stably transmitted to the piston system. These improvements reduce the time it takes to stabilize a single pressure point to just a few seconds, significantly improving work efficiency and measurement accuracy. Utility Model Content

[0004] The purpose of the utility model is to provide a buffer type pressure regulating device applied to a gas piston pressure gauge, which solves the problem that the compressible pressure storage cavity of the existing pressure regulating equipment is relatively small and the pressure control accuracy is low.

[0005] The technical solution adopted by the utility model is a buffering pressure regulating device applied to a gas piston pressure gauge, comprising a screw, a rotating shaft is sleeved on the outer wall of one end of the screw, a slotted cylinder is sleeved on the outer wall of the other end of the screw, a deep groove ball bearing a and a deep groove ball bearing b are sleeved on the outer wall of the end of the rotating shaft close to the slotted cylinder, a fixing ring is clamped on the end of the slotted cylinder close to the rotating shaft, a pump piston is fixedly connected to the end of the screw away from the rotating shaft, a pump cylinder is sleeved on the outer wall of the pump piston, the slotted cylinder and the pump cylinder are connected by a connecting sleeve, a rear cover is provided on the end of the pump cylinder away from the screw, the rear cover is connected to a pipeline, a sliding groove is horizontally opened on the slotted cylinder along the axial direction, a screw step groove is vertically opened on the screw, a limit slip ring is provided in the screw step groove, and a limit lever is provided in the limit slip ring.

[0006] The utility model is also characterized in that:

[0007] The outer walls of the deep groove ball bearing a and the deep groove ball bearing b are in contact with the inner wall of one end of the slotted cylinder close to the rotating shaft.

[0008] A pressure ring is sleeved on the outer wall of the rotating shaft. The pressure ring is arranged between the fixing ring and the deep groove ball bearing a. The outer wall of the pressure ring contacts the slotted cylinder. The pressure ring is used to fix the deep groove ball bearing a.

[0009] One end of the slotted cylinder close to the rotating shaft is provided with a slotted cylinder clamping ring, and a fixing ring is clamped on the slotted cylinder clamping ring.

[0010] A plurality of O-type sealing rings e are sleeved in the pump piston sealing groove, and the plurality of O-type sealing rings e are arranged between the pump piston and the pump cylinder.

[0011] A plurality of O-type sealing rings f are sleeved in the sealing groove on the outer wall of the rear cover, and the plurality of O-type sealing rings f are arranged between the rear cover and the pump cylinder.

[0012] An O-ring g is provided between the slotted cylinder and the connecting sleeve.

[0013] A connecting groove is provided at one end of the lead screw close to the pump cylinder, a groove is provided on the pump piston, and the lead screw is fixedly connected to the pump piston through the connecting groove and the groove.

[0014] The beneficial effects of the utility model are:

[0015] The buffered pressure-regulating device for a gas piston pressure gauge provided by this utility model features a simple design and is easy to maintain. By enlarging the pressure storage chamber and adding a bearing at the front end to reduce friction, the device achieves rapid response and high-precision pressure control. During the pressure gauge's pressure regulation process, the rotation of the pressure regulator precisely controls minute changes in pressure, allowing pressure to be quickly and stably transmitted to the piston system. These improvements reduce the time required to stabilize a single pressure point to just a few seconds, significantly improving work efficiency and measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model is a structural schematic diagram of a buffer type pressure regulating device applied to a gas piston type pressure gauge.

[0017] In the figure, 1. rotating shaft, 2. screw, 3. fixing ring, 4. deep groove ball bearing a, 5. deep groove ball bearing b, 6. slotted cylinder, 7. limiting slip ring, 8. limiting lever, 9. connecting sleeve, 10. pump piston, 11. pump cylinder, 12. rear cover, 13. pressure ring, 14. O-ring e, 15. O-ring f, 16. O-ring g. DETAILED DESCRIPTION

[0018] The present invention will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0019] The utility model provides a buffer type pressure regulating device for a gas piston pressure gauge, such as Figure 1As shown, it includes a screw 2, the outer wall of one end of the screw 2 is sleeved with a rotating shaft 1, the outer wall of the other end of the screw 2 is sleeved with a slotted cylinder 6, the outer wall of the end of the rotating shaft 1 close to the slotted cylinder 6 is sleeved with a deep groove ball bearing a4 and a deep groove ball bearing b5, the end of the slotted cylinder 6 close to the rotating shaft 1 is clamped with a fixing ring 3, the end of the screw 2 away from the rotating shaft 1 is fixedly connected to a pump piston 10, the outer wall of the pump piston 10 is sleeved with a pump cylinder 11, the slotted cylinder 6 and the pump cylinder 11 are connected by a connecting sleeve 9, the end of the pump cylinder 11 away from the screw 2 is provided with a rear cover 12, the rear cover 12 is connected to a pipeline, a sliding groove is horizontally opened on the slotted cylinder 6 along the axial direction, a screw step groove is vertically opened on the screw 2, a limit slip ring 7 is provided in the screw step groove, and a limit lever 8 is provided in the limit slip ring 7;

[0020] The outer walls of the deep groove ball bearings a4 and b5 are in contact with the inner wall of the end of the slotted cylinder 6 close to the rotating shaft 1;

[0021] The outer wall of the rotating shaft 1 is provided with a pressure ring 13, which is arranged between the fixing ring 3 and the deep groove ball bearing a4. The outer wall of the pressure ring 13 contacts the slotted cylinder 6, and the pressure ring 13 is used to fix the deep groove ball bearing a4;

[0022] A slotted cylinder 6 is provided with a slotted cylinder clamping ring at one end close to the rotating shaft 1, and a fixing ring 3 is clamped on the slotted cylinder clamping ring; a plurality of O-type sealing rings e14 are sleeved in the sealing groove of the pump piston 10, and the plurality of O-type sealing rings e14 are provided between the pump piston 10 and the pump cylinder 11;

[0023] A plurality of O-rings f15 are sleeved in the sealing groove on the outer wall of the rear cover 12, and the plurality of O-rings f15 are arranged between the rear cover 12 and the pump cylinder 11;

[0024] An O-ring g16 is provided between the slotted cylinder 6 and the connecting sleeve 9; a connecting groove is provided at one end of the screw 2 close to the pump cylinder 11, and a groove is provided on the pump piston 10, and the screw 2 is fixedly connected to the pump piston 10 through the connecting groove and the groove.

[0025] The utility model provides a buffer-type pressure-regulating device for a gas piston pressure gauge, and its installation process is as follows: grease is applied to the surface of the lead screw 2 and the lead screw is screwed into the rotating shaft 1; the deep groove ball bearing b5 is installed in the slotted cylinder 6, the previous process is installed, the deep groove ball bearing a4 is sleeved on the rotating shaft 1, and the connection is locked with a pressure ring 13; the O-ring f15 is installed in the sealing groove of the rear cover 12, and lubricating oil is applied to the surface of the O-ring f15 and the pump cylinder 11 is installed; the O-ring e14 is installed in the sealing groove of the pump piston 10, and lubricating oil is applied to the surface of the O-ring e14; the connecting sleeve 9 passes through the slotted cylinder 6, the lead screw 2 connects the groove sleeve and the groove of the pump piston 10, and is pushed into the pump cylinder 11; the pump cylinder 11 is fastened with the connecting sleeve 9; the fixing ring 3 is fastened and the pressure regulating device is installed.

[0026] Example 1

[0027] The buffer type pressure regulating device applied to the gas piston pressure gauge proposed in this embodiment is as follows: Figure 1 As shown, it includes a screw 2, the outer wall of one end of the screw 2 is sleeved with a rotating shaft 1, the outer wall of the other end of the screw 2 is sleeved with a slotted cylinder 6, the outer wall of the end of the rotating shaft 1 close to the slotted cylinder 6 is sleeved with a deep groove ball bearing a4 and a deep groove ball bearing b5, the end of the slotted cylinder 6 close to the rotating shaft 1 is clamped with a fixing ring 3, the end of the screw 2 away from the rotating shaft 1 is fixedly connected to a pump piston 10, the outer wall of the pump piston 10 is sleeved with a pump cylinder 11, the slotted cylinder 6 and the pump cylinder 11 are connected by a connecting sleeve 9, the end of the pump cylinder 11 away from the screw 2 is provided with a rear cover 12, the rear cover 12 is connected to a pipeline, a sliding groove is horizontally opened on the slotted cylinder 6 along the axial direction, a screw step groove is vertically opened on the screw 2, a limit slip ring 7 is provided in the screw step groove, and a limit lever 8 is provided in the limit slip ring 7.

[0028] Example 2

[0029] The buffer type pressure regulating device applied to the gas piston pressure gauge proposed in this embodiment is as follows: Figure 1 As shown, it includes a screw 2, the outer wall of one end of the screw 2 is sleeved with a rotating shaft 1, the outer wall of the other end of the screw 2 is sleeved with a slotted cylinder 6, the outer wall of the end of the rotating shaft 1 close to the slotted cylinder 6 is sleeved with a deep groove ball bearing a4 and a deep groove ball bearing b5, the end of the slotted cylinder 6 close to the rotating shaft 1 is clamped with a fixing ring 3, the end of the screw 2 away from the rotating shaft 1 is fixedly connected to a pump piston 10, the outer wall of the pump piston 10 is sleeved with a pump cylinder 11, the slotted cylinder 6 and the pump cylinder 11 are connected by a connecting sleeve 9, the end of the pump cylinder 11 away from the screw 2 is provided with a rear cover 12, the rear cover 12 is connected to a pipeline, a sliding groove is horizontally opened on the slotted cylinder 6 along the axial direction, a screw step groove is vertically opened on the screw 2, a limit slip ring 7 is provided in the screw step groove, and a limit gear rod 8 is provided in the limit slip ring 7; the outer walls of the deep groove ball bearing a4 and the deep groove ball bearing b5 are in contact with the inner wall of the end of the slotted cylinder 6 close to the rotating shaft 1.

[0030] Example 3

[0031] The buffer type pressure regulating device applied to the gas piston pressure gauge proposed in this embodiment is as follows: Figure 1As shown, it includes a screw 2, the outer wall of one end of the screw 2 is sleeved with a rotating shaft 1, the outer wall of the other end of the screw 2 is sleeved with a slotted cylinder 6, the outer wall of the end of the rotating shaft 1 close to the slotted cylinder 6 is sleeved with a deep groove ball bearing a4 and a deep groove ball bearing b5, the end of the slotted cylinder 6 close to the rotating shaft 1 is clamped with a fixing ring 3, the end of the screw 2 away from the rotating shaft 1 is fixedly connected to a pump piston 10, the outer wall of the pump piston 10 is sleeved with a pump cylinder 11, the slotted cylinder 6 and the pump cylinder 11 are connected by a connecting sleeve 9, and the end of the pump cylinder 11 away from the screw 2 is provided with a rear cover 12, The cover 12 is connected to a pipeline, a slide groove is horizontally opened on the slotted cylinder 6 along the axial direction, a screw step groove is vertically opened on the screw 2, a limit slip ring 7 is provided in the screw step groove, and a limit lever 8 is provided in the limit slip ring 7; the outer walls of the deep groove ball bearing a4 and the deep groove ball bearing b5 are in contact with the inner wall of one end of the slotted cylinder 6 close to the rotating shaft 1; a pressure ring 13 is sleeved on the outer wall of the rotating shaft 1, and the pressure ring 13 is provided between the fixing ring 3 and the deep groove ball bearing a4. The outer wall of the pressure ring 13 is in contact with the slotted cylinder 6, and the pressure ring 13 is used to fix the deep groove ball bearing a4.

[0032] Example 4

[0033] The buffer type pressure regulating device applied to the gas piston pressure gauge proposed in this embodiment is as follows: Figure 1 As shown, it includes a screw 2, the outer wall of one end of the screw 2 is sleeved with a rotating shaft 1, the outer wall of the other end of the screw 2 is sleeved with a slotted cylinder 6, the outer wall of the end of the rotating shaft 1 close to the slotted cylinder 6 is sleeved with a deep groove ball bearing a4 and a deep groove ball bearing b5, the end of the slotted cylinder 6 close to the rotating shaft 1 is clamped with a fixing ring 3, the end of the screw 2 away from the rotating shaft 1 is fixedly connected to a pump piston 10, the outer wall of the pump piston 10 is sleeved with a pump cylinder 11, the slotted cylinder 6 and the pump cylinder 11 are connected by a connecting sleeve 9, the end of the pump cylinder 11 away from the screw 2 is provided with a rear cover 12, the rear cover 12 is connected to a pipeline, and the slotted cylinder 6 is axially A slide groove is provided horizontally, and a screw step groove is provided vertically on the screw 2. A limit slip ring 7 is provided in the screw step groove, and a limit lever 8 is provided in the limit slip ring 7; the outer walls of the deep groove ball bearing a4 and the deep groove ball bearing b5 are in contact with the inner wall of the end of the slotted cylinder 6 close to the rotating shaft 1; a pressure ring 13 is provided on the outer wall of the rotating shaft 1, and the pressure ring 13 is provided between the fixed ring 3 and the deep groove ball bearing a4, and the outer wall of the pressure ring 13 is in contact with the slotted cylinder 6, and the pressure ring 13 is used to fix the deep groove ball bearing a4; a slotted cylinder 6 is provided with a slotted cylinder clamping ring at one end close to the rotating shaft 1, and the fixed ring 3 is clamped on the slotted cylinder clamping ring.

[0034] Example 5

[0035] The buffer type pressure regulating device applied to the gas piston pressure gauge proposed in this embodiment is as follows: Figure 1As shown, it includes a screw 2, the outer wall of one end of the screw 2 is sleeved with a rotating shaft 1, the outer wall of the other end of the screw 2 is sleeved with a slotted cylinder 6, the outer wall of the end of the rotating shaft 1 close to the slotted cylinder 6 is sleeved with a deep groove ball bearing a4 and a deep groove ball bearing b5, the end of the slotted cylinder 6 close to the rotating shaft 1 is clamped with a fixing ring 3, the end of the screw 2 away from the rotating shaft 1 is fixedly connected to a pump piston 10, the outer wall of the pump piston 10 is sleeved with a pump cylinder 11, the slotted cylinder 6 and the pump cylinder 11 are connected through a connecting sleeve 9, the end of the pump cylinder 11 away from the screw 2 is provided with a rear cover 12, the rear cover 12 is connected to a pipeline, a slide groove is horizontally opened on the slotted cylinder 6 along the axial direction, a screw step groove is vertically opened on the screw 2, and the screw A limiting slip ring 7 is provided in the step groove, and a limiting gear lever 8 is provided in the limiting slip ring 7; the outer walls of the deep groove ball bearing a4 and the deep groove ball bearing b5 are in contact with the inner wall of the slotted cylinder 6 at one end close to the rotating shaft 1; a pressure ring 13 is sleeved on the outer wall of the rotating shaft 1, and the pressure ring 13 is arranged between the fixing ring 3 and the deep groove ball bearing a4, and the outer wall of the pressure ring 13 is in contact with the slotted cylinder 6, and the pressure ring 13 is used to fix the deep groove ball bearing a4; a slotted cylinder clamping ring is provided at one end of the slotted cylinder 6 close to the rotating shaft 1, and the fixing ring 3 is clamped on the slotted cylinder clamping ring; a number of O-rings e14 are sleeved in the sealing groove of the pump piston 10, and a number of O-rings e14 are arranged between the pump piston 10 and the pump cylinder 11.

[0036] Example 6

[0037] The buffer type pressure regulating device applied to the gas piston pressure gauge proposed in this embodiment is as follows: Figure 1As shown, it includes a screw 2, the outer wall of one end of the screw 2 is sleeved with a rotating shaft 1, the outer wall of the other end of the screw 2 is sleeved with a slotted cylinder 6, the outer wall of the end of the rotating shaft 1 close to the slotted cylinder 6 is sleeved with a deep groove ball bearing a4 and a deep groove ball bearing b5, the end of the slotted cylinder 6 close to the rotating shaft 1 is clamped with a fixing ring 3, the end of the screw 2 away from the rotating shaft 1 is fixedly connected to a pump piston 10, the outer wall of the pump piston 10 is sleeved with a pump cylinder 11, the slotted cylinder 6 and the pump cylinder 11 are connected through a connecting sleeve 9, the end of the pump cylinder 11 away from the screw 2 is provided with a rear cover 12, the rear cover 12 is connected to a pipeline, a sliding groove is horizontally opened on the slotted cylinder 6 along the axial direction, a screw step groove is vertically opened on the screw 2, a limit slip ring 7 is provided in the screw step groove, and a limit lever is provided in the limit slip ring 7 8; the outer walls of the deep groove ball bearing a4 and the deep groove ball bearing b5 are in contact with the inner wall of the end of the slotted cylinder 6 close to the rotating shaft 1; the outer wall of the rotating shaft 1 is provided with a pressure ring 13, which is arranged between the fixing ring 3 and the deep groove ball bearing a4, and the outer wall of the pressure ring 13 is in contact with the slotted cylinder 6, and the pressure ring 13 is used to fix the deep groove ball bearing a4; the end of the slotted cylinder 6 close to the rotating shaft 1 is provided with a slotted cylinder clamping ring, and the fixing ring 3 is clamped on the slotted cylinder clamping ring; a plurality of O-rings e14 are sleeved in the sealing groove of the pump piston 10, and a plurality of O-rings e14 are arranged between the pump piston 10 and the pump cylinder 11; a plurality of O-rings f15 are sleeved in the sealing groove of the outer wall of the rear cover 12, and a plurality of O-rings f15 are arranged between the rear cover 12 and the pump cylinder 11.

[0038] Example 7

[0039] The buffer type pressure regulating device applied to the gas piston pressure gauge proposed in this embodiment is as follows: Figure 1As shown, it includes a screw 2, the outer wall of one end of the screw 2 is sleeved with a rotating shaft 1, the outer wall of the other end of the screw 2 is sleeved with a slotted cylinder 6, the outer wall of the end of the rotating shaft 1 close to the slotted cylinder 6 is sleeved with a deep groove ball bearing a4 and a deep groove ball bearing b5, the end of the slotted cylinder 6 close to the rotating shaft 1 is clamped with a fixing ring 3, the end of the screw 2 away from the rotating shaft 1 is fixedly connected to a pump piston 10, the outer wall of the pump piston 10 is sleeved with a pump cylinder 11, the slotted cylinder 6 and the pump cylinder 11 are connected through a connecting sleeve 9, the end of the pump cylinder 11 away from the screw 2 is provided with a rear cover 12, the rear cover 12 is connected to a pipeline, a sliding groove is horizontally opened on the slotted cylinder 6 along the axial direction, a screw step groove is vertically opened on the screw 2, a limiting slip ring 7 is provided in the screw step groove, and a limiting gear rod 8 is provided in the limiting slip ring 7; deep groove ball bearing a4 and deep The outer wall of the groove ball bearing b5 contacts the inner wall of the end of the slotted cylinder 6 close to the rotating shaft 1; the outer wall of the rotating shaft 1 is provided with a pressure ring 13, which is arranged between the fixing ring 3 and the deep groove ball bearing a4, and the outer wall of the pressure ring 13 contacts the slotted cylinder 6, and the pressure ring 13 is used to fix the deep groove ball bearing a4; the end of the slotted cylinder 6 close to the rotating shaft 1 is provided with a slotted cylinder clamping ring, and the fixing ring 3 is clamped on the slotted cylinder clamping ring; a plurality of O-rings e14 are sleeved in the sealing groove of the pump piston 10, and a plurality of O-rings e14 are arranged between the pump piston 10 and the pump cylinder 11; a plurality of O-rings f15 are sleeved in the sealing groove of the outer wall of the rear cover 12, and a plurality of O-rings f15 are arranged between the rear cover 12 and the pump cylinder 11; an O-ring g16 is provided between the slotted cylinder 6 and the connecting sleeve 9.

[0040] Example 8

[0041] The buffer type pressure regulating device applied to the gas piston pressure gauge proposed in this embodiment is as follows: Figure 1As shown, it includes a screw 2, the outer wall of one end of the screw 2 is sleeved with a rotating shaft 1, the outer wall of the other end of the screw 2 is sleeved with a slotted cylinder 6, the outer wall of the end of the rotating shaft 1 close to the slotted cylinder 6 is sleeved with a deep groove ball bearing a4 and a deep groove ball bearing b5, the end of the slotted cylinder 6 close to the rotating shaft 1 is clamped with a fixing ring 3, the end of the screw 2 away from the rotating shaft 1 is fixedly connected to a pump piston 10, the outer wall of the pump piston 10 is sleeved with a pump cylinder 11, the slotted cylinder 6 and the pump cylinder 11 are connected through a connecting sleeve 9, the end of the pump cylinder 11 away from the screw 2 is provided with a rear cover 12, the rear cover 12 is connected to a pipeline, a sliding groove is horizontally opened on the slotted cylinder 6 along the axial direction, a screw step groove is vertically opened on the screw 2, a limit slip ring 7 is provided in the screw step groove, and a limit gear rod 8 is provided in the limit slip ring 7; the outer walls of the deep groove ball bearings a4 and the deep groove ball bearings b5 are connected to the inner wall of the end of the slotted cylinder 6 close to the rotating shaft 1 contact; a pressure ring 13 is provided on the outer wall of the rotating shaft 1, and the pressure ring 13 is arranged between the fixed ring 3 and the deep groove ball bearing a4. The outer wall of the pressure ring 13 contacts the slotted cylinder 6, and the pressure ring 13 is used to fix the deep groove ball bearing a4; a slotted cylinder 6 is provided with a slotted cylinder clamping ring at one end close to the rotating shaft 1, and the fixed ring 3 is clamped on the slotted cylinder clamping ring; a plurality of O-rings e14 are provided in the sealing groove of the pump piston 10, and a plurality of O-rings e14 are arranged between the pump piston 10 and the pump cylinder 11; a plurality of O-rings f15 are provided in the sealing groove of the outer wall of the rear cover 12, and a plurality of O-rings f15 are arranged between the rear cover 12 and the pump cylinder 11; an O-ring g16 is provided between the slotted cylinder 6 and the connecting sleeve 9; a connecting groove is provided at one end of the screw 2 close to the pump cylinder 11, and a groove is provided on the pump piston 10. The screw 2 is fixedly connected to the pump piston 10 through the connecting groove and the groove.

Claims

1. A buffered pressure regulating device for a gas piston pressure gauge, characterized in that: The invention comprises a screw (2), wherein the outer wall of one end of the screw (2) is provided with a rotating shaft (1), the outer wall of the other end of the screw (2) is provided with a slotted cylinder (6), the outer wall of the end of the rotating shaft (1) close to the slotted cylinder (6) is provided with a deep groove ball bearing a (4) and a deep groove ball bearing b (5), the end of the slotted cylinder (6) close to the rotating shaft (1) is clamped with a fixing ring (3), the end of the screw (2) away from the rotating shaft (1) is fixedly connected with a pump piston (10), and the pump piston ( 10) A pump cylinder (11) is provided on the outer wall sleeve, the slotted cylinder (6) is connected to the pump cylinder (11) through a connecting sleeve (9), a rear cover (12) is provided at the end of the pump cylinder (11) away from the lead screw (2), and the rear cover (12) is connected to a pipeline, a sliding groove is provided on the slotted cylinder (6) along the axial direction, a lead screw step groove is provided on the lead screw (2) in the vertical direction, a limit slip ring (7) is provided in the lead screw step groove, and a limit lever (8) is provided in the limit slip ring (7).

2. The buffer type pressure regulating device for a gas piston pressure gauge according to claim 1, characterized in that: The outer walls of the deep groove ball bearing a (4) and the deep groove ball bearing b (5) are in contact with the inner wall of one end of the slotted cylinder (6) close to the rotating shaft (1).

3. The buffer type pressure regulating device for a gas piston pressure gauge according to claim 1, characterized in that: The outer wall of the rotating shaft (1) is provided with a pressure ring (13), the pressure ring (13) is arranged between the fixing ring (3) and the deep groove ball bearing a (4), the outer wall of the pressure ring (13) is in contact with the slotted cylinder (6), and the pressure ring (13) is used to fix the deep groove ball bearing a (4).

4. The buffer type pressure regulating device for a gas piston pressure gauge according to claim 1, characterized in that: A slotted barrel clamping ring is provided at one end of the slotted barrel (6) close to the rotating shaft (1), and a fixing ring (3) is clamped on the slotted barrel clamping ring.

5. The buffer type pressure regulating device for a gas piston pressure gauge according to claim 1, characterized in that: A plurality of O-type sealing rings e (14) are sleeved in the sealing groove of the pump piston (10), and the plurality of O-type sealing rings e (14) are arranged between the pump piston (10) and the pump cylinder (11).

6. The buffer type pressure regulating device for a gas piston pressure gauge according to claim 1, characterized in that: A plurality of O-type sealing rings f (15) are sleeved in the sealing groove on the outer wall of the rear cover (12), and the plurality of O-type sealing rings f (15) are arranged between the rear cover (12) and the pump cylinder (11).

7. The buffer type pressure regulating device for a gas piston pressure gauge according to claim 1, characterized in that: An O-type sealing ring g (16) is provided between the slotted cylinder (6) and the connecting sleeve (9).

8. The buffer type pressure regulating device for a gas piston pressure gauge according to claim 1, characterized in that: A connecting groove is provided at one end of the lead screw (2) close to the pump cylinder (11), a groove is provided on the pump piston (10), and the lead screw (2) is fixedly connected to the pump piston (10) via the connecting groove and the groove.

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